A&PII Ch. 13
The obturator and femoral nerves branch from this plexus
lumbar plexus
Which nerve is compressed in carpal tunnel syndrome?
median
Facial
motor and sensory
Glossopharyngeal
motor and sensory
Trigeminal
motor and sensory
Vagus
motor and sensory
Hypoglossal
motor only
Improper administration of an injection to the buttocks may injure a nerve of this plexus
sacral plexus
Olfactory
sensory only
Prevents muscle overstretching and maintains muscle tone
stretch
Has major sensory nerves of the face
Trigeminal
Controls movement of superior oblique muscle
Trochlear
Helps to regulate blood pressure and digestion.
Vagus
Serves the senses of audition and equilibrium
Vestibulocochlear
Which of the following cranial nerves has its neuron cell body located in a site other than the cranial sensory ganglia?
cranial nerve II
The back is innervated by the
dorsal rami of spinal nerves
Which of the following is (are) mixed nerves?
dorsal ramus
In a crossed-extensor reflex, if the right arm was grabbed it would flex and the left arm would ________.
extend
Pressure, pain, and temperature receptors in the skin are ________.
exteroceptors
Allows you to smile
facial
Tests both upper and lower motor pathways by stimulating the sole of the foot with a dull instrument extension
plantar
What level controls intermediate relay for incoming and outgoing neurons?
projection level
Produces a rapid withdrawal of the body part from a painful stimulus; ipsilateral
flexor
Inborn or intrinsic reflexes are ________.
involuntary, yet may be modified by learned behavior
Receptors located in epithelium of the nasal cavity
Olfactory
Forms a cross pattern called a chiasma
Optic
Which of the following cranial nerves is purely sensory?
Optic
Formed by the union of a cranial and a spinal root
Accessory
Examine the cross section through the lumbar section of the spinal cord and the two patellar reflex pathways shown. What identifies these synapses?
Afferent impulses synapse with motor neurons and interneurons Pathways will activate one muscle and simultaneously inhibit its antagonist muscle
Examine and characterize the two motor pathways in the stretch patellar reflex
Alpha motor neurons send efferent messages to the quadriceps, while parallel efferent messages to the hamstrings are reduced
Which of the following is a sensory receptor that is stimulated by light touch?
Meissner's corpuscles
Which of the following receptors is considered a free dendritic ending?
Merkel's discs
Feeling a gentle caress on your arm would likely involve all of the following except ________
Pacinian corpuscles
Which sensory receptor only senses the initial stimulus of deep pressure?
Pacinian corpuscles
Causes lens shape changes during visual accommodation
Oculomotor
Which is the true statement about the synapses in the spinal cord in the stretch reflex?
Interneurons make inhibitory synapses with neurons that prevent contraction of the antagonist muscle.
A fracture of the ethmoid bone could result in damage to which cranial nerve?
Olfactory
Which of the following branches of a spinal nerve contain autonomic motor nerve fibers and is only found in the thoracic region?
Rami communicantes
After axonal injury, regeneration in peripheral nerves is guided by ________.
Schwann Cells
All processing at the circuit level going up to the perceptual level must synapse in the ________.
Thalamus
A patient sustains a ventral horn injury to the lumbar region of the spine. This injury has damaged the cell bodies of several afferent nerves within the region. Predict how the patient's patellar reflex might be affected
The patient's patellar reflex would be absent or weak
The phrenic nerve branches from this plexus.
cervical plexus
Select the true statements (more than one) about the characteristics of sensory neurons in the stretch reflex
When a stretch activates the muscle spindle, these sensory neurons transmit impulses at a higher frequency These sensory neurons transmit afferent impulses toward the spinal cord (CNS)
If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?
a complete loss of voluntary movement
Checks the integrity of the spinal cord and dorsal rami at the level of T8 to T12
abdominal
Turns the eyeball laterally
abducens
Striking the funny bone may cause injury to a nerve of this plexus
brachial plexus
Trauma to a nerve of this plexus may cause wristdrop
brachial plexus
Striking the "funny bone" is actually stimulation of (or injury) to. the ________.
ulnar nerve
Problems in balance may follow trauma to which nerve?
vestibulocochlear