Chapter 13 The Peripheral Nervous System

The meningeal branch of a spine nerve actually reenters the vertebral canal to innervate the meninges and blood vessels

True

In the somatosensory system there are no third- order neurons in the cerebellum

True

Pacinian corpuscle can be exterceptors, interoceptors, or proprioceptor

True

The glossopharyngeal nerve is the only cranial nerve that contains sensory fibers

False

The musculocutaneous nerve is a major nerve of the brachial plexus

True

The second cranial nerve forms a chiasma at the base of the brain for the partial crossover of neural fibers

True

The only cranial nerves to extend beyond the head and neck region are the vagus nerves

True

The dorsal ramus consists only of motor fibers bringing information to the spinal cord.

False

Dermatomes are skin segments that relate to sensory innervation regions of the spinal nerves

True

Irritation of the phrenic nerve may cause diaphragm spasms called hiccups

True

The obturator nerve branches from the sacral plexus

False

Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron for synergistic muscles in the same area is inhibited and cannot respond.

False

External strabismus and ptosis could be caused by damage to the oculomotor nerve.

True

The patellar "knee jerk" reflex is an example of a

Stretch reflex

Which nerve is not a branch of the trigeminal nerve?

cervical

Which of the following nerves does not arise from the brachial plexus?

phrenic

Which of the following is not a way that sensory receptors are classified?

Sensitivity to a stimulus

Which of the following is not a main level of neural integration in the somatosensory system?

Segmental

The posterior side of the thigh, leg, and foot is served by which nerve?

Tibial nerve

Starting at the spinal cord, the subdivisions of the brachial plexus are

roots, trunks, divisons, and cords

The cranial nerve with a cervical origin (spinal cord) is the

accessory

Which of the following is an incorrect statement regarding the occurrence of a sensation?

The stimulus energy must be converted into the energy of a graded potential called a transduction potential

A major nerve of the lumbar plexus is the

femoral

Spinal nerves exiting the cord from the level of L4 to S4 form the

sacral plexus

Inborn or intrinsic reflexes are

involuntary, yet may be modified by learned behavior

Which of the following is not an aspect of sensory perception?

visceral identification

Striking the "funny bone" is actually stimulation of ( or injury to) the

ulnar nerve

A reflex that causes muscle relaxation and lengthening in response to muscle tension is called a

tendon reflex

Pressure , pain, and temperature receptors in the skin are

exteroceptors

Potentially damaging stimuli that result in pain are selectively detected by

nociceptors

Which receptors adapt most slowly

pressure receptors

Nerves that carry impulses toward CNS only are

afferent nerves

After axonal injury, regeneration in peripheral nerves is guided by

Schwann cells

Regeneration within the CNS

is prevented due to growth-inhibiting proteins of oligodendrocytes

In a crossed-extensor reflex, if the right arm was grabbed it would flex and the left arm would

extend

What does pattern recognition do?

Allow us to recognize a familiar face

All processing at the circuit level going up to the perceptual level must synapse in the

thalamus

The sciatic nerve is a combination of which two nerves?

common fibular and tibial

Which nerve is compressed in carpal tunnel syndrome?

median

Bell’s palsy is

characterized by paralysis of facial muscles?

Which of the following is correct simple spinal reflex arc?

receptor, afferent neuron, integration center, efferent neuron, effector

Mixed cranial nerves containing both motor and sensory fibers include all except which of the following?

olfactory

Transduction refers to conversion of

stimulus energy into energy of a graded potential

The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?

musculocutaneous

The cranial nerves that have neural connections with the tongue include all except the

trochlear

Problem in balance may follow trauma in which nerve?

vestibulocochlear

A fracture of the ethmoid bone could result in damage to which cranial nerve?

olfactory

Ganglia is associated with the afferent nerve fibers

contain cell bodies of sensory neurons

A fall or an improperly delivered gluteal injection could result in

sciatica

Feeling a gentle caress on your arm would likely involve all of he following except

Pacinian corpuscles

A patient who received a blow the side of he skull exhibits the following signs and symptoms on that side of the face: he is unable to close his eye, and the corner of his mouth droops. Which cranial nerve has been damaged?

facial

If the ventral root of a spinal nerve were cut, what would be the result in the tissue of region that nerve supplies?

a complete loss of sensation

The highest level of motor control involves the basal nuclei and the

cerebellum

Body movement receptors are called

proprioceptors

The perineurium defines the boundary of a

fascicle

Which nerve is the largest of the cranial nerves

trigeminal

The primary receptor for he pain stimuli is the

nociceptor

The facial nerve is a cranial nerves numbers

VII

Tingling sensation when blood has been cut off from an area, as when blood has been cut off from an area, as when the foot "goes to sleep"

parathesia

Partial or total of smell is known as

anosmia

The thickest and the longest nerve in the body is the

sciatic nerve

Information regarding skeletal muscle tension is provided by tendon organs

and muscle length by muscle spindles