MED SURG CHAPTER 65

Cranial nerve IX is also known as which of the following?

Glossopharyngeal Explanation: Cranial nerve IX is the glossopharyngeal nerve. The vagus nerve is cranial nerve X. Cranial nerve XII is the hypoglossal nerve. The spinal accessory is the cranial nerve XI.

A patient has been diagnosed with damage to Broca's area of the left frontal lobe. To document the extent of damage, the nurse would assess the patient's:

Speech. Explanation: The motor strip, which lies in the frontal lobe, anterior to the central sulcus, is responsible for muscle movement. It also contains Broca's area (left frontal lobe region in most people), critical for motor control of speech.

The provider orders the Romberg test for a patient. The nurse tells the patient that the provider wants to evaluate his equilibrium by assessing which cranial nerve?

VIII Explanation: Cranial nerve VIII (acoustic) can be checked to assess equilibrium status.

The nurse is caring for a client in the emergency department with a diagnosis of head trauma secondary to a motorcycle accident. The nurse aide is assigned to clean the client's face and torso. The nurse would provide further instruction after seeing that the nurse aide:

moved the client's head to clean behind the ears. Explanation: Further instruction would be provided to the nurse aide when the nurse aide attempted to move the client's head to clean behind the ears. There should be no movement of the client's head when there is a history of head trauma. Cleaning the client's face with soapy water, cleaning the eye area, and cleaning the neck and upper chest are all appropriate actions completed by the nurse aide.

Which of the following neurotransmitters are deficient in myasthenia gravis?

Acetylcholine Explanation: A decrease in the amount of acetylcholine causes myasthenia gravis. A decrease of serotonin leads to depression. Parkinson's disease is caused by a depletion of dopamine. Decreased levels of GABA may cause seizures.

Which term refers to the inability to coordinate muscle movements, resulting difficulty walking?

Ataxia Explanation: Ataxia is the inability to coordinate voluntary muscle action; tremors (rhythmic, involuntary movements) noted at rest or during movement suggest a problem in the anatomic areas responsible for balance and coordination. Agnosia is the loss of ability to recognize objects through a particular sensory system. Spasticity is the sustained increase in tension of a muscle when it is passively lengthened or stretched.

Lesions in the temporal lobe may result in which type of agnosia?

Auditory Explanation: Lesions in the temporal lobe (lateral and superior portions) may result in auditory agnosia. Lesions in the occipital lobe may result in visual agnosia. Lesions in the parietal lobe may result in tactile agnosia. Lesions in the parietal lobe (posteroinferior regions) may result in relationship and body part agnosia.

A client is scheduled for an EEG. The client inquires about any diet-related prerequisites before the EEG. Which diet-related advice should the nurse provide to the client?

Avoid taking sedative drugs or drinks that contain caffeine for at least 8 hours before the test Explanation: The client is advised to refrain from taking sedative drugs or consuming food or drinks that contain caffeine for at least 8 hours before the test, because these may interfere with the EEG result. The client is not advised to increase or decrease the intake of minerals in the diet.

Which of the following areas of the brain are responsible for temperature regulation?

Hypothalamus Explanation: The hypothalamus also controls and regulates the autonomic nervous system and maintains temperature by promoting vasoconstriction or vasodilation. The thalamus acts primarily as a relay station for all sensation except smell. The medulla and pons are essential for respiratory function

A nurse is completing a neurological assessment and determines that the client has significant visual deficits. A brain tumor is considered. Considering the functions of the lobes of the brain, which area will most likely contain the neurologic deficit?

Occipital Explanation: The vision center is located in the occipital lobe. There is little other functioning that may interfere with the visual process in the other lobes of the brain.

Which term refers to the inability to recognize objects through a particular sensory system?

Agnosia Explanation: Agnosia may be visual, auditory, or tactile. Dementia refers to organic loss of intellectual function. Ataxia refers to the inability to coordinate muscle movements. Aphasia refers to loss of the ability to express oneself or to understand language.

If a client has a lower motor neuron lesion, the nurse would expect to observe which manifestation upon physical assessment?

Decreased muscle tone Explanation: A client with a lower motor neuron lesion would be expected to have decreased muscle tone. Those with upper motor neuron lesion would have hyperactive reflexes, no muscle atrophy, and muscle spasticity.

The brain stem holds the medulla oblongata. What is the function of the medulla oblongata?

Transmits motor impulses from the brain to the spinal cord Explanation: The medulla oblongata lies below the pons and transmits motor impulses from the brain to the spinal cord and sensory impulses from peripheral sensory neurons to the brain. The medulla contains vital centers concerned with respiration, heartbeat, and vasomotor activity (the control of smooth muscle activity in blood vessel walls).

A client has undergone a lumbar puncture as part of a neurological assessment. The client is put under the care of a nurse after the procedure. Which important postprocedure nursing intervention should be performed to ensure the client's maximum comfort?

Encourage the client to drink liberal amounts of fluids Explanation: The nurse should encourage the client to take liberal fluids and should inspect the injection site for swelling or hematoma. These measures help restore the volume of cerebrospinal fluid extracted. The client is administered antihistamines before a test only if he or she is allergic to contrast dye and contrast dye will be used. The room of the client who has undergone a lumbar puncture should be kept dark and quiet. The client should be encouraged to rest, because sensory stimulation tends to magnify discomfort.

A nurse and nursing student are caring for a client recovering from a lumbar puncture yesterday. The client reports a headache despite being on bedrest overnight. The physician plans an epidural blood patch this morning. The student asks how this will help the headache. The correct reply from the nurse is which of the following?

"The blood will seal the hole in the dura and prevent further loss of cerebral spinal fluid." Explanation: Loss of CSF causes the headache. Occasionally, if the headache persists, the epidural blood patch technique may be used. Blood is withdrawn from the antecubital vein and injected into the site of the previous puncture. The rationale is that the blood will act as a plug to seal the hole in the dura and preven further loss of CSF. The blood is not put into the subarachnoid space. The needle is inserted below the level of the spinal cord, which prevents damage to the cord. It is not a lack of moisture that prevents healing; it is more related to the size of the needle used for the puncture.

The nurse is performing a neurologic assessment on a client diagnosed with a stroke and cannot elicit a gag reflex. This deficit is related to which of the following cranial nerves?

X Explanation: CN X is the vagus nerve and has to do with the gag reflex, laryngeal hoarseness, swallowing ability, and the symmetrical rise of the uvula and soft palate. CN VII is the facial nerve and has to do with symmetry of facial movements and the ability to discriminate between the tastes of sugar and salt. The inability to close one eyelid indicates impairment of this nerve. CN VIII is the acoustic nerve. It has to do with hearing, air and bone conduction, and balance. CN III is the oculomotor nerve and has to do with pupillary response, conjugate movements, and nystagmus.

Which neurotransmitter demonstrates inhibitory action, helps control mood and sleep, and inhibits pain pathways?

Serotonin Explanation: The brain stem, hypothalamus, and dorsal horn of the spinal cord are sources of serotonin. Enkephalin is excitatory and associated with pleasurable sensations. Norepinephrine is usually excitatory and affects mood and overall activity. Acetylcholine is usually excitatory, but the parasympathetic effects are sometimes inhibitory.

During recovery from a stroke, a client is given nothing by mouth to help prevent aspiration. To determine when the client is ready for a liquid diet, the nurse assesses the client's swallowing ability once per shift. This assessment evaluates:

cranial nerves IX and X. Explanation: Swallowing is a motor function of cranial nerves IX and X. Cranial nerves I, II, and VIII don't possess motor functions. The motor functions of cranial nerve III include extraocular eye movement, eyelid elevation, and pupil constriction. The motor function of cranial nerve V is chewing. Cranial nerve VI controls lateral eye movement.

The nurse is instructing a community class when a student asks, "How does someone get super strength in an emergency?" The nurse should respond by describing the action of the:

sympathetic nervous system. Explanation: The division of the autonomic nervous system called the sympathetic nervous system regulates the expenditure of energy. The neurotransmitters of the sympathetic nervous system are called catecholamines. During an emergency situation or an intensely stressful event, the body adjusts to deliver blood flow and oxygen to the brain, muscles, and lungs that need to react in the situation. The musculoskeletal system benefits from the sympathetic nervous system as the fight-or-flight effects pump blood to the muscles. The parasympathetic nervous system works to conserve body energy not expend it during an emergency. The endocrine system regulates metabolic processes.

A patient recently noted difficulty maintaining his balance and controlling fine movements. The nurse explains that the provider will order diagnostic studies for the part of his brain known as the:

Cerebellum. Explanation: The cerebellum is largely responsible for coordination of all movement. It also controls fine movement, balance, position (postural) sense or proprioception (awareness of where each part of the body is), and integration of sensory input.

Lower motor neuron lesions cause

flaccid muscles. Explanation: Lower motor neuron lesions cause flaccidity, muscle atrophy, decreased muscle tone, and loss of voluntary control. Upper motor neuron lesions cause increased muscle tone. Upper motor neuron lesions cause no muscle atrophy. Upper motor neuron lesions cause hyperactive and abnormal reflexes.

The nurse is assessing the client's mental status . Which question will the nurse include in the assessment?

"Who is the president of the United States?" Explanation: Assessing orientation to time, place, and person assists in evaluating mental status. Does the client know what day it is, what year it is, and the name of the president of the United States? Is the client aware of where he or she is? Is the client aware of who the examiner is and why he or she is in the room? "Can you write your name on this piece of paper?" will assess language ability. "Can you count backward from 100?" assesses the client's intellectual function. "Are you having hallucinations?" assesses the client's thought content.

A client is ordered to undergo CT of the brain with IV contrast. Before the test, the nurse should complete which action first?

Assess the client for medication allergies. Explanation: If a contrast agent is used, the client must be assessed before the CT scan for an iodine/shellfish allergy, because the contrast agent used may be iodine based. If the client has no allergies to shellfish, then kidney function must also be evaluated, as the contrast material is cleared through the kidneys. A suitable IV line for contrast injection and a period of fasting (usually 4 hours) are required before the study. Clients who receive an IV contrast agent are monitored during and after the procedure for allergic reactions and changes in kidney function.

Which occurs when reflexes are hyperactive when the foot is abruptly dorsiflexed?

Clonus Explanation: Clonus occurs when the foot is abruptly dorsiflexed. It continues to "beat" two or three times before it settles into a position of rest. Sustained clonus always indicates the present of central nervous system disease and requires further evaluation. Ataxia is incoordination of voluntary muscle action. Rigidity is an increase in muscle tone at rest characterized by increased resistance to passive movement. Flaccid posturing is usually the result of lower brain stem dysfunction; the client has no motor function, is limp, and lacks motor tone.

A patient has a deficiency of the neurotransmitter serotonin. The nurse is aware that this deficiency can lead to:

Depression. Explanation: Serotonin helps control mood and sleep. A deficiency leads to depression.

What safety actions does the nurse need to take for a client receiving oxygen therapy who is undergoing magnetic resonance imaging (MRI)?

Ensure that no client care equipment containing metal enters the room where the MRI is located. Explanation: For client safety the nurse must make sure no client care equipment that contains metal or metal parts (e.g., portable oxygen tanks) enters the room where the MRI is located. The magnetic field generated by the unit is so strong that any metal-containing items will be strongly attracted and can literally be pulled away with such great force that they can fly like projectiles toward the magnet.

A nurse is caring for a client with deteriorating neurologic status. The nurse is performing an assessment at the beginning of the shift that reveals a falling blood pressure and heart rate, and the client makes no motor response to stimuli. Which documentation of neuromuscular status is most appropriate?

Flaccidity Explanation: The nurse would document flaccidity when the client makes no motor response to stimuli. Abnormal posturing and weak motor tone would be documented specifically as the nurse would assess. Decorticate posturing is when a client is stiff with bent arms and clenched fists with legs straight out.

A patient sustained a head injury during a fall and has changes in personality and affect. What part of the brain does the nurse recognize has been affected in this injury?

Frontal lobe Explanation: The frontal lobe, the largest lobe, located in the front of the brain. The major functions of this lobe are concentration, abstract thought, information storage or memory, and motor function. It contains Broca's area, which is located in the left hemisphere and is critical for motor control of speech. The frontal lobe is also responsible in large part for a person's affect, judgment, personality, and inhibitions

A nurse is assisting during a lumbar puncture. How should the nurse position the client for this procedure?

Lateral recumbent, with chin resting on flexed knees Explanation: To maximize the space between the vertebrae, the client is placed in a lateral recumbent position with knees flexed toward the chin. The needle is inserted between L4 and L5. The other positions wouldn't allow as much space between L4 and L5.

The pre-nursing class is learning about the nervous system in their anatomy class. What part of the nervous system would the students learn is responsible for digesting food and eliminating body waste?

Parasympathetic Explanation: The parasympathetic division of the autonomic nervous system works to conserve body energy and is partly responsible for slowing heart rate, digesting food, and eliminating body wastes.

A nurse conducts the Romberg test by asking the client to stand with the feet close together and the eyes closed. As a result of this posture, the client suddenly sways to one side and is about to fall when the nurse intervenes and prevents the client from being injured. In which way should the nurse interpret the client's result?

Positive Romberg test, indicating a problem with equilibrium Explanation: If the client sways and starts to fall during the Romberg test, it indicates a positive result. This means the client has a problem with equilibrium. The examiner or the nurse stands fairly close to the client during the test to prevent the client from falling. The Romberg test is used to assess the client's motor function, including muscle movement, size, tone, strength, and coordination. However, the Romberg test is not used to assess the client's level of consciousness, body mass, or vision.

The nurse is caring for a client who is to have a lumbar puncture. What are the lowest vertebrae that contain the spinal cord?

Second lumbar vertebrae Explanation: The spinal cord ends between the first and second lumbar vertebrae.

Which cerebral lobe contains the auditory receptive areas?

Temporal Explanation: The temporal lobe plays the most dominant role of any area of the cortex in cerebration. The frontal lobe, the largest lobe, controls concentration, abstract thought, information storage or memory, and motor function. The parietal lobe contains the primary sensory cortex, which analyzes sensory information and relays interpretation to the thalamus and other cortical areas. The occipital lobe is responsible for visual interpretation.

The nurse who is employed in a neurologist's office is performing a history and assessment on a client experiencing hearing difficulty. The nurse is most correct to gather equipment to assess the function of cranial nerve:

VIII Explanation: There are 12 pairs of cranial nerves. Cranial nerve VIII is the vestibulocochlear or auditory nerve responsible for hearing and balance. Cranial nerve II is the optic nerve. Cranial nerve VI is the abducens nerve responsible for eye movement. Cranial nerve XI is the accessory nerve and is involved with head and shoulder movement.

A client is scheduled for standard EEG testing to evaluate a possible seizure disorder. Which nursing intervention should the nurse perform before the procedure?

Withhold anticonvulsant medications for 24 to 48 hours before the exam Explanation: Anticonvulsant agents, tranquilizers, stimulants, and depressants should be withheld 24 to 48 hours before an EEG because these medications can alter EEG wave patterns or mask the abnormal wave patterns of seizure disorders. To increase the chances of recording seizure activity, it is sometimes recommended that the client be deprived of sleep on the night before the EEG. Coffee, tea, chocolate, and cola drinks are omitted in the meal before the test because of their stimulating effect. However, meals are not omitted, because an altered blood glucose concentration can cause changes in brain wave patterns. The client is informed that a standard EEG takes 45 to 60 minutes; a sleep EEG requires 12 hours.

A nurse is caring for a client with an injury to the central nervous system. When caring for a client with a spinal cord insult slowing transmission of the motor neurons, the nurse would anticipate a delayed reaction in:

response due to interrupted impulses from the central nervous system Explanation: The central nervous system is composed of the brain and the spinal cord. Motor neurons transmit impulses from the central nervous system. Slowing transmission in this area would slow the response of transmission leading to a delay in reaction. Sensory neurons transmit impulses from the environment to the central nervous system, allowing identification of a stimulus. Cognitive centers of the brain interpret the information.

A client preparing to undergo a lumbar puncture states he doesn't think he will be able to get comfortable with his knees drawn up to his abdomen and his chin touching his chest. He asks if he can lie on his left side. Which statement is the best response by the nurse?

"Although the required position may not be comfortable, it will make the procedure safer and easier to perform." Explanation: The nurse should explain that the knee-chest position is necessary to make the procedure safer and easier to perform. Lying on his left side won't make the procedure easy or safe to perform. The nurse shouldn't simply tell the client there is no other option because the client is entitled to understand the rationale for the required position. Reporting the client's concerns to the physician won't meet the client's needs in this situation.

To evaluate a client's cerebellar function, a nurse should ask:

"Do you have any problems with balance?" Explanation: To evaluate cerebellar function, the nurse should ask the client about problems with balance and coordination. The nurse asks about difficulty speaking or swallowing to assess the functions of cranial nerves IX, X, and XII. Questions about muscle strength help her evaluate the client's motor system.

A patient arrives to have an MRI done in the outpatient department. What information provided by the patient warrants further assessment to prevent complications related to the MRI?

"I am trying to quit smoking and have a patch on." Explanation: Before the patient enters the room where the MRI is to be performed, all metal objects and credit cards (the magnetic field can erase them) must be removed. This includes medication patches that have a metal backing and metallic lead wires; these can cause burns if not removed

A nurse is preparing a client for lumbar puncture. The client has heard about post-lumbar puncture headaches and asks how to avoid having one. The nurse tells the client that these headches can be avoided by doing which of the following after the procedure?

"Remain prone for 2 to 3 hours." Explanation: The headache is caused by cerebral spinal fluid (CSF) leakage at the puncture site. The supply of CSF in the cranium is depleted so that there is not enough to cushion and stabilize the brain. When the client assumes an upright position, tension and stretching of the venous sinuses and pain-sensitive structures occur. The headache may be avoided if the client remains prone for 2 to 3 hours after the procedure. Drinking plenty of fluids will help in replacing the CSF. Hydration is important for replacement of the CSF lost so remaining NPO is not an option unless it is for other reasons, then IV fluid replacement will be important. Ambulating right away will make the possibility of a headache more likely. It is not necessary to remain on bedrest for more than a few hours, unless a headache has occurred; then bedest for overnight is usually sufficient.

The nurse is caring for a client who is undergoing single-photon emission computed tomography (SPECT). What is a potential side effect that this client may suffer?

Allergic reaction to the imaging material Explanation: SPECT obtains images of the brain after the client intravenously receives radiopharmaceuticals and radioisotopes approximately 1 hour before the test begins. A potential risk of SPECT is the client's allergic reaction to the imaging material. Headache is an aftereffect of a cisternal puncture, and claustrophobia is experienced by clients during a magnetic resonance imaging scan.

Which safety action will the nurse implement for a client receiving oxygen therapy who is undergoing magnetic resonance imaging (MRI)?

Ensure that no client care equipment containing metal enters the room where the MRI table is located. Explanation: For client safety the nurse must make sure that no client care equipment that contains metal or metal parts (eg, portable oxygen tanks) enters the room where the MRI is located. The client must be assessed for the presence of medication patches with foil backing (e.g., nicotine patch) that may cause a burn. The magnetic field generated by the unit is so strong that any metal-containing items will be strongly attracted and can literally be pulled away with such great force that they can fly like projectiles toward the magnet.

Which cerebral lobes is the largest and controls abstract thought?

Frontal Explanation: The frontal lobe also controls information storage or memory and motor function. The temporal lobe contains the auditory receptive area. The parietal lobe contains the primary sensory cortex, which analyzes sensory information and relays interpretation to the thalamus and other cortical areas. The occipital lobe is responsible for visual interpretation

The nurse is performing the physical examination of a client with a suspected neurologic disorder. In addition to assessing other parts of the body, the nurse should assess for neck rigidity. Which method should help the nurse assess for neck rigidity correctly?

Moving the head and chin toward the chest Explanation: The neck is examined for stiffness or abnormal position. The presence of rigidity is assessed by moving the head and chin toward the chest. The nurse should not maneuver the neck if a head or neck injury is suspected or known. The neck should also not be maneuvered if trauma to any part of the body is evident. Moving the head toward the sides or pressing the bones on the neck will not help assess for neck rigidity correctly. While assessing for neck rigidity, sensation at the neck area is not to be assessed.

The nurse is performing a neurologic assessment and requests that the patient stand with eyes open and then closed for 20 seconds to assess balance. What type of test is the nurse performing?

Romberg test Explanation: The Romberg test is a neurologic assessment of the patient's balance in which the patient is instructed to stand with eyes open and then closed for 20 seconds. The Weber (including the watch-tick) and Rinne tests assess hearing.

A client who has sustained a head injury to the parietal lobe cannot identify a familiar object by touch. The nurse knows that this deficit is which of the following?

Tactile agnosia Explanation: Tactile agnosia is the inability to identify a familiar object by touch. Visual agnosia is the loss of ability to recognize objects through sight. The Romberg test has to do with balance. Ataxia is defined as incoordination of voluntary muscle action.

The nurse is performing a neurological assessment of a client who has sustained damage to the frontal cortex. Which of the following deficits will the nurse look for during assessment?

The inability to tell how a mouse and a cat are alike Explanation: The client with damage to the fronal cortex will display a deficit in intellectual functioning. Questions designed to assess this capacity might include the ability to recognize similarities: for example, how are a mouse and dog or pen and pencil alike? The Romberg test assesses balance, which has to do with the cerebellar and basal ganglia influence on the motor system. Absence of movement below the waist suggests a deficit with the spinal cord. Intentional tremors have to do with deficits of the motor system.

The spinal cord is composed of 31 pairs of spinal nerves. How many pairs of thoracic nerves are contained within the spinal column?

Twelve Explanation: There are twelve pairs of thoracic nerves, five lumbar and sacral nerves, eight cervical, and one coccygeal.

A client experienced a stroke that damaged the hypothalamus. The nurse should anticipate that the client will have problems with:

body temperature control. Explanation: The body's thermostat is located in the hypothalamus; therefore, injury to that area can cause problems with body temperature control. Balance and equilibrium problems are related to cerebellar damage. Visual acuity problems would occur following occipital or optic nerve injury. Thinking and reasoning problems are the result of injury to the cerebrum.

The nurse has completed evaluating the client's cranial nerves. The nurse documents impairment of the right cervical nerves (CN IX and CN X). Based on these findings, the nurse should instruct the client to

refrain from eating or drinking for now. Explanation: Significant findings of CN IX (glossopharyngeal) include difficulty swallowing (dysphagia) and impaired taste, and significant findings of CN X (vagus) include weak or absent gag reflex, difficulty swallowing, aspiration, hoarseness, and slurred speech (dysarthria). Based on these findings, the nurse should instruct the client to refrain from eating and drinking and should contact the health care provider. The other instructions are associated with abnormalities of CN II (optic) and CN VIII (acoustic).

The nurse is completing a neurologic assessment and uses the whisper test to assess which cranial nerve?

Acoustic Explanation: Clinical examination of the acoustic nerve can be done by the whisper test. Having the client say "ah" tests the vagus nerve. Observing for symmetry when the client performs facial movements tests the facial nerve. The olfactory nerve is tested by having the client identify specific odors.

The physician's office nurse is caring for a client who has a history of a cerebral aneurysm. Which diagnostic test does the nurse anticipate to monitor the status of the aneurysm?

Cerebral angiography Explanation: The nurse would anticipate a cerebral angiography, which detects distortion of the cerebral arteries and veins . A myelogram detects abnormalities of the spinal canal. An electroencephalogram records electrical impulses of the brain. An echoencephalography is an ultrasound of the structures of the brain.

Which lobe of the brain is responsible for concentration and abstract thought?

Frontal Explanation: The major functions of the frontal lobe are concentration, abstract thought, information storage or memory, and motor function. The parietal lobe analyzes sensory information such as pressure, vibration, pain, and temperature. The occipital lobe is the primary visual cortex. The temporal lobe contains the auditory receptive areas located around the temples.

A 53-year-old man presents to the emergency department with a chief complaint of inability to form words, and numbness and weakness of the right arm and leg. Where would you locate the site of injury?

Left frontoparietal region Explanation: The patient is exhibiting signs of expressive aphasia with numbness/tingling and weakness of the right arm and leg. This indicates injury to the expressive speech center (Broca's area), which is located in the inferior portion of the frontal lobe. The motor strip is located in the posterior portion of the frontal lobe. The sensory strip is located in the anterior parietal lobe.

A nurse is working in a neurologist's office. The physician orders a Romberg test. The nurse should have the client:

close his or her eyes and stand erect. Explanation: In the Romberg test, the client stands erect with the feet close together and eyes closed. If the client sways as if to fall, it is considered a positive Romberg test. All of the other options include components of neurologic tests, indicating neurologic deficits and balance.