Chapter 13 The Peripheral Nervous System

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


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


Pacinian corpuscle can be exterceptors, interoceptors, or proprioceptor


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


The musculocutaneous nerve is a major nerve of the brachial plexus


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


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


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


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


Irritation of the phrenic nerve may cause diaphragm spasms called hiccups


The obturator nerve branches from the sacral plexus


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.


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


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

Stretch reflex

Which nerve is not a branch of the trigeminal nerve?


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


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?


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


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


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


Potentially damaging stimuli that result in pain are selectively detected by


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


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


The sciatic nerve is a combination of which two nerves?

common fibular and tibial

Which nerve is compressed in carpal tunnel syndrome?


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?


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?


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


Problem in balance may follow trauma in which nerve?


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


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


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?


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


Body movement receptors are called


The perineurium defines the boundary of a


Which nerve is the largest of the cranial nerves


The primary receptor for he pain stimuli is the


The facial nerve is a cranial nerves numbers


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"


Partial or total of smell is known as


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

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