How can we help?

You can also find more resources in our Help Center.

66 terms

Chapter 13

STUDY
PLAY
true
The meningeal branch of a spinal 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.
false
There are 41 pairs of spinal nerves.
false
The glossopharyngeal nerve is the only cranial nerve that contains sensory fibers.
true
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 partial crossover of neural fibers.
true
The only cranial nerves to extend beyond the head and neck region are the vagus nerves.
false
The dorsal ramus consists only of motor fibers bringing information to the spinal cord.
true
Dermatomes are skin segments that relate to sensory innervation regions of the spinal nerves.
true
Spinal roots and rami are similar in that they both contain sensory and motor fibers.
true
Irritation of the phrenic nerve may cause diaphragm spasms called hiccups.
false
The obturator nerve branches from the sacral plexus.
false
Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron in the same area is inhibited and cannot respond.
true
External strabismus and ptosis could be caused by damage to the oculomotor nerve.
true
In order to regulate motor activity, to start and stop movements, and to coordinate postural movements, the cerebellum and basal nuclei are involved.
stretch reflex
The ʺknee jerkʺ reflex is an example of a(n) ________.
cervical
The ________ nerve is not a branch of the trigeminal nerve.
phrenic
Which of the following nerves does not arise from the brachial plexus?
CPG
Which of the following is at the lowest level of the CNS?
effector level
The three primary levels of neural integration in a sensory system include all of the following except the ________.
tibial
The posterior side of the thigh, leg, and foot is served by the ________ nerve.
rami, trunks, divisions, and cords (RTDC)
Starting at the spinal cord, the subdivisions of the brachial plexus are, in order ________.
accessory
The cranial nerve with a dual origin (brain and spinal cord) is the ________.
thoracic
Which of the following is not a nerve plexus?
femoral
A major nerve of the lumbar plexus is the ________.
sacral plexus
Spinal nerves exiting the cord from the level of L4 to S4 form the ________.
supplies innervation to the lateral rectus muscle of the eye
The abducens nerve ________.
may be modified by learned behavior
Basic reflexes ________.
There are always multiple synapses with chains of interneurons.
Which of the following is not true about the integration center of a reflex arc?
ulnar nerve
Striking the ʺfunny boneʺ is actually stimulation of the ________.
twelve thoracic
Which of the following numbers of pairs of spinal nerves is correct?
Only ventral rami form plexuses
Select the statement about plexuses that is most correct ________.
Golgi tendon reflex
A reflex that causes muscle relaxation and lengthening in response to muscle contraction is called a ________.
exteroceptors
Pressure, pain, and temperature receptors are ________.
nociceptors
Potentially damaging stimuli that result in pain are selectively detected by ________.
are mechanoreceptors
Meissnerʹs corpuscles ________.
nociceptors
Which receptors adapt most slowly?
lateral rectus muscle
The abducens nerve conveys proprioceptor impulses from the ________ to the brain.
afferent nerves
Nerves that carry impulses toward the CNS only are ________.
Schwann cells
After axonal injury, regeneration in peripheral nerves is guided by ________.
is complicated by secondary demyelination
Regeneration within the CNS ________.
extend
In a crossed extensor reflex, if the right arm were grabbed it would flex and the left arm would ________.
Pattern recognition allows us to see a familiar face.
Select the correct definition.
thalamus
All processing at the circuit level going up to the perceptual level must synapse in the ________.
common fibular and tibial
The sciatic nerve is a combination of which two nerves?
sacral plexus
The largest and longest nerve of the body is found in the ________.
cervical plexus
Irritation of a major nerve of this plexus may cause hiccups.
is characterized by paralysis of facial muscles
Bellʹs palsy ________.
when the great toe dorsiflexes and the other toes fan laterally
Babinskiʹs sign is ________.
receptor, afferent neuron, integration center, efferent neuron, effector
A simple spinal reflex goes along which of the following reflex arcs?
vestibulocochlear
Mixed cranial nerves containing both motor and sensory fibers include all except which of the following?
stimulus information to nerve impulses
Transduction refers to conversion of ________.
Touch
________ always takes a nonspecific ascending pathway.
musculocutaneous
The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?
trochlear
The cranial nerves that have neural connections with the tongue include all except the ________.
vestibulocochlear
Problems in balance may follow trauma to which nerve?
olfactory
A fracture of the ethmoid bone would result in damage to which cranial nerve?
Afferent nerve fibers contain cell bodies of sensory neurons.
Select the statement that is most correct.
sciatica
An improperly delivered gluteal injection could result in ________.
trigeminal
Which nerve does not use the jugular foramen as a route of exit from the skull?
sensory receptors
The peripheral nervous system includes ________.
Pacinian corpuscles
Feeling a gentle caress on your arm would likely involve all of the following except ________.
facial
A patient who received a blow to the side of the 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?
cerebral cortex
The circuit level of the somatosensory system involves CNS centers in all of the following except the ________.
basal nuclei
The projection level of the brain does not include the ________.
a complete loss of voluntary movement
If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?