13. The Peripheral Nervous System

Spinal nerves are called mixed nerves because they (a) contain sensory and motor fibers, (b) exit at intervertebral foramina, (c) are associated with a pair of spinal ganglia, (d) are associated with posterior and anterior roots.

Match the names of the cranial nerves in column B to the appropriate description in column A. Column A_______(1) causes pupillary constriction_______(2) the major sensory nerve of the face_______(3) serves the sternocleido-mastoid and trapezius muscles_______(4) purely sensory (two nerves)_______(5) serves the tongue muscles_______(6) allows you to chew your food_______(7) impaired in Bell's palsy_______(8) helps regulate heart activity_______(9) helps you hear and maintain your balance_______(10) contain parasympathetic motor fibers (four nerves) Column Ba. abducensb. accessoryc. faciald. glossopharyngeale. hypoglossalf. oculomotorg. olfactoryh. optici. trigeminalj. trochleark. vagusl. vestibulocochlear

The connective tissue sheath that surrounds a fascicle of nerve fibers is thea. epineurium,b. endoneurium,c. perineurium,d. epimysium.

A sensory region monitored by the posterior rami of a single spinal segment is (a) a ganglion, (b) a fascicle, (c) a dermatome, (d) a ramus.

Multiple ChoiceMore than one choice may apply.Which contains only motor fibers?a. b. c. d.

The major nerve of the cervical plexus that innervates the diaphragm is the (a) median nerve, (b) axillary nerve, (c) phrenic nerve, (d) common fibular nerve.

Multiple ChoiceMore than one choice may apply.Cranial nerves that have some function in vision include thea. trochlear.b. trigeminal.c. abducens.d. facial.

The genitofemoral, femoral, and lateral femoral cutaneous nerves are major nerves of the (a) lumbar plexus, (b) sacral plexus, (c) brachial plexus, (d) cervical plexus.

Multiple ChoiceMore than one choice may apply.Motor functions of the extensor muscles of the arm, forearm, and fingers would be affected by damage to which one of these nerves?a. Radialb. Axillaryc. Ulnard. Median

List the names of the 12 pairs of cranial nerves. (Hint: use the mnemonic device 'Oh, Once One Takes The Anatomy Final, Very Good Vacations Are Heavenly.' )

Damage to the posterior spinocerebellar tract on the left side of the spinal cord at the L1 level would interfere with the coordinated movement of which limb(s)?

How many pairs of cranial nerves are there? Which are purely sensory? Which activates the chewing muscles? Which helps regulate heart rate and activity of the digestive tract?

What region of the body is served by the dorsal rami of the spinal nerves? By the ventral rami?

The only cranial nerves that are attached to the cerebrum are the____ nerves. (a) optic, (b) oculomotor, (c) trochlear, (d) olfactory, (e) abducens.

Why do cervical nerves outnumber cervical vertebrae?