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Chapter 12: Peripheral Nervous System

Total questions: 18

Worksheet time: 9mins

Name
Class
Date
1.

Match the axons with their classifications: axons to extrafusal muscle fibers

a)

Ia

b)

AB or C

c)

Aa

d)

Ay

2.

Match the axons with their classifications: axons to intrafusal muscle fibers

a)

Ia

b)

AB or C

c)

Aa

d)

Ay

3.

Match the axons with their classifications: axons that convey sensory information perceived as pain and temperature

a)

Ia

b)

AB or C

c)

Aa

d)

Ay

4.

Match the axons with their classifications: axons that convey sensory information perceived as touch and pressure

a)

Ia

b)

AB or C

c)

Aa

d)

Ay

5.

What is the most functionally important branch of the cervical plexus

a)

branch to the sternocleidomastoid muscle

b)

branch to the biceps brachii

c)

branch to the triceps

d)

phrenic nerve

e)

musculocutaneous nerve

6.

Which one of the plexuses innervates the posterior thigh and most of the leg and foot

a)

cervical

b)

brachial

c)

lumbar

d)

sacral

7.

Miniature endplate potentials are essential for which of the following:

a)

inhibiting the action of lower motor neurons

b)

initiating contraction of muscles

c)

preventing atrophy of muscle fibers

d)

all of the above

8.

Trophic changes after denervation include which of the following:

a)

muscle atrophy

b)

shiny skin

c)

brittleness of fingernails and toenails

d)

all of the above

9.

match each specific lesion with its classification: rupture of the ulnar nerve, secondary to the fracture of the humerus

a)

traumatic myelinopathy

b)

traumatic axonopathy

c)

traumatic severance

d)

multiple mononeuropathy

e)

polyneuropathy

10.

match each specific lesion with its classification: decreased sensation in a stocking/glove distribution

a)

traumatic myelinopathy

b)

traumatic axonopathy

c)

traumatic severance

d)

multiple mononeuropathy

e)

polyneuropathy

11.

match each specific lesion with its classification: loss of sensory, autonomic, and motor function of the right musculocutaneous and femoral nerves and the left sciatic nerve

a)

traumatic myelinopathy

b)

traumatic axonopathy

c)

traumatic severance

d)

multiple mononeuropathy

e)

polyneuropathy

12.

match each specific lesion with its classification: chronic compression of the median nerve resulting in mild demyelination

a)

traumatic myelinopathy

b)

traumatic axonopathy

c)

traumatic severance

d)

multiple mononeuropathy

e)

polyneuropathy

13.

match each specific lesion with its classification: crushing injury of the peroneal nerve

a)

traumatic myelinopathy

b)

traumatic axonopathy

c)

traumatic severance

d)

multiple mononeuropathy

e)

polyneuropathy

14.

In a recording from a nerve conduction velocity (NCV) study, decreased amplitude of recorded potentials, combined with slowing of NCV, indicates which of the following:

a)

Myelinopathy

b)

Myopathy

c)

Myasthenia Gravis

d)

Upper Motor Neuron Lesion

e)

Axonopathy

15.

If NCV studies show that conduction is slowed at a single site in one nerve, yet the NCV is normal throughout the remainder of the nerve and in other nerves, the disorder is which of the following:

a)

Traumatic myelinopathy

b)

Axonopathy

c)

Severance Injury

d)

Myopathy

e)

Polyneuropathy

16.

If the NCV is normal along the length of the peripheral nerve, yet the amplitude of the electromyogram (EMG) potential is decreased, the disorder is:

a)

Myelinopathy

b)

Myopathy

c)

Lower motor neuron lesion

d)

Upper motor neuron lesion

e)

Axonopathy

17.

Myasthenia Gravis is an autoimmune disease affecting the:

a)

myelin of peripheral nerves

b)

ACh receptors at the neuromuscular junction

c)

Release of ACh from the presynaptic terminal

d)

Storage of calcium in the sarcoplasmic reticulum

e)

alpha motor neurons in the ventral horn of the spinal cord

18.

Guillian-Barre syndrome is an autoimmune disease that causes:

a)

necrosis of the alpha motor neuron

b)

degeneration of the motor endplate

c)

spasticity

d)

peripheral demyelination

e)

degeneration of the C-fiber axons