CHPT 12

. What space, found between the vertebral wall and the dura mater, is the area for injecting anesthesia for childbirth? A. subarachnoid space B. subdural space C. epidural space D. epipial space

C

Adduction of the thigh involves the ____________. A. peroneal nerve. B. femoral nerve. C. obturator nerve. D. pudendal nerve. E. tibial nerve

C

Dermatomal maps are important clinically because they A. can be used to check for motor function. B. locate the position of cranial nerves. C. can be used to help locate nerve damage. D. indicate what muscles are innervated by each spinal nerve. E. can be used to detect cranial nerve damage.

C

Spinal nerves exiting the cord from the level of L4 to S4 form the A. lumbar plexus. B. femoral plexus. C. sacral plexus. D. pelvic plexus. E. brachial plexus

C

The brachial plexus supplies nerves that function to contract which of the following? A. the diaphragm B. intercostal muscles C. muscles of the arm and forearm D. muscles of the lower limb E. abdominal muscles

C

Which of the following nerves is part of the brachial plexus? A. peroneal B. ansa cervicalis C. ischiadic (sciatic) D. musculocutaneous E. femoral

D

If a person fell down the steps and then developed pain down his anterior thigh into the knee, which of the following spinal nerves was probably damaged? A. obturator B. femoral C. tibial D. common fibular (peroneal) E. pudendal

B

Muscle spindles A. are innervated by gamma motor neurons. B. originate in the spinal cord. C. are specialized nerve cells. D. are found encapsulated in nerve endings. E. are innervated by alpha motor neurons.

A

When someone taps you on your shoulder, they stimulate the ____ nerve. A. axillary B. brachial C. radial D. musculocutaneous E. ulnar

A

Which nerve is involved when a dancer points his/her toes? A. tibial B. femoral C. obturator D. pudendal E. common fibular (peroneal)

A

Which of the following events in a stretch reflex occurs last? A. alpha motor neurons transmit action potentials to muscle causing contraction B. muscle spindle detects stretch of muscle C. afferent neurons conduct action potentials to the spinal cord D. afferent neurons synapse with alpha motor neurons E. muscle is stretched

A

. Intercostal nerves are formed from the A. thoracic plexus. B. ventral rami of thoracic spinal nerves. C. dorsal rami of thoracic spinal nerves. D. rami communicans of the thoracic spinal nerves. E. cervical plexus.

B

A man was in an accident and severed his spinal cord between C6 and C7. Which of the following would NOT occur? A. loss of sensation in the trunk below the shoulders, the lower limbs and portions of the arms B. loss of use of the phrenic nerves and paralysis of the diaphragm C. loss of movement in the lower limbs D. loss of the use of the intercostals nerves, and breathing would be affected because the intercostals muscles would be paralyzed E. loss of sensation and movement in the jaw

B

Improper use of crutches could cause compression of the _____ nerve. A. axillary B. radial C. musculocutaneous D. ulnar E. median

B

In the Golgi tendon reflex, A. muscle spindles detect tension in a tendon. B. alpha motor neurons are inhibited causing muscle relaxation. C. gamma motor neurons cause muscle contraction. D. there is reciprocal innervation to facilitate the reflex. E. alpha motor neurons are stimulated causing muscle contraction.

B

Nerve fibers in the phrenic nerves that innervated the diaphragm arise primarily from which plexus? A. brachial B. cervical C. lumbar D. sacral E. cranial

B

The conus medullaris A. anchors the spinal cord to the coccyx. B. is a tapered, cone like region immediately inferior to the lumbar enlargement. C. marks the exit of nerves to the upper extremity. D. is located adjacent to the foramen magnum. E. is inferior to the cauda equina.

B

The endoneurium A. surrounds nerve cell bodies. B. surrounds individual axons and their Schwann cells. C. bundles axons into fascicles. D. bundles fascicles into nerves. E. surrounds nerve tracts in the spinal cord

B

The sciatic nerve is composed of the A. femoral nerve and the tibial nerve. B. tibial nerve and the common fibular nerve. C. femoral nerve and the obturator nerve. D. common fibular nerve and the pudendal nerve. E. superior gluteal and inferior gluteal.

B

When a person sits on a hard surface for a period of time, his foot or leg may "go to sleep." This sensation is the result of compressing the _____ nerve. A. femoral B. sciatic C. obturator D. pudendal E. ulnar

B

. Branches of the ____ nerve are anesthetized before a doctor performs an episiotomy for childbirth. A. genitofemoral B. gluteal C. cutaneous femoral D. pudendal E. common fibular (peroneal)

D

Ventral rami of some spinal nerves join with each other to form a A. ganglion. B. dermatome. C. cord. D. plexus. E. nerve.

D

When a person hits their "funny bone," they cause temporary damage to the _____ nerve. A. axillary B. radial C. musculocutaneous D. ulnar E. median

D

. An injury to the wrist that results in edema in the carpal tunnel would compress the A. axillary nerve. B. radial nerve. C. musculocutaneous nerve. D. ulnar nerve. E. median nerve

E

A reflex that protects limbs by removing them from painful stimuli is the A. stretch reflex. B. crossed extensor reflex. C. Golgi tendon reflex. D. alternating reflex. E. withdrawal reflex

E