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chpt 13
chpt 13 study guide
75
Anatomy
Undergraduate 1
02/27/2010

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Term
Formed by the union of cranial and a spinal root.
Definition
Accessory
Term
Receptors located in epithelium of the nasal cavity.
Definition
Olfactory
Term
Serves the senses of hearing and equilibrium.
Definition
Vestibulocochlear
Term
Helps to regulate blood pressure and digestion.
Definition
Vagus
Term
Turns the eyeball laterally.
Definition
Abducens
Term
Tests both upper and lower motor pathways. The sole of the foot is stimulated with a dull instrument
Definition
Plantar
Term
Checks the integrity of the spinal cord and dorsal rami at the level of T8 to T 12.
Definition
Abdominal
Term
Produces a rapid withdrawl of the body part from a painful stimulus; ipsilateral.
Definition
Flexor
Term
Prevents muscle overstretching and maintains muscle tone.
Definition
Stretch
Term
The obturator and femoral nerves branch from this plexus.
Definition
Lumbar plexus
Term
Striking the funny bone may cause injury to a nerve of this plexus.
Definition
Brachial plexus
Term
Trauma to a nerve of this plexus may cause wrist drop.
Definition
Brachial plexus
Term
Improper administration of an injection to the buttocks may injure a nerve of this plexus.
Definition
Sacral plexus
Term
The phrenic nerve branches from this plexus.
Definition
Cervical plexus
Term
Regulates motor activity.
Definition
Precommand level
Term
Central pattern generators
Definition
Segmental level
Term
Intermediate relay for incoming and outgoing neurons.
Definition
Projection level
Term
Projection level
Definition
Precommand level
Term
Includes cortical and brain stem motor areas.
Definition
Projection level
Term
The neural machinery of the spinal cord.
Definition
Segmental level
Term
The meningeal branch of a spinal nerve actually reenters the vertebral canal to innervate the meninges and blood vessels.
Definition
T
Term
In the somatosensory system there are no third-order neurons in the cerebellum.
Definition
T
Term
There are 41 pairs of spinal nerves.
Definition
F
Term
The ʺknee jerkʺ reflex is an example of a(n) ________.
Definition
stretch reflex
Term
The ________ nerve is not a branch of the trigeminal nerve.
Definition
cervical
Term
Which of the following nerves does not arise from the brachial plexus?
Definition
phrenic
Term
Which of the following is at the lowest level of the CNS?
Definition
CPG
Term
The three primary levels of neural integration in a sensory system include all of the following except the ________.
Definition
effector level
Term
The posterior side of the thigh, leg, and foot is served by the ________ nerve.
Definition
tibial
Term
Starting at the spinal cord, the subdivisions of the brachial plexus are, in order ________.
Definition
rami, trunks, divisions, and cords
Term
The cranial nerve with a dual origin (brain and spinal cord) is the ________.
Definition
accessory
Term
Which of the following is not a nerve plexus?
Definition
thoracic
Term
A major nerve of the lumbar plexus is the ________.
Definition
femoral
Term
Spinal nerves exiting the cord from the level of L4 to S4 form the ________.
Definition
sacral plexus
Term
The abducens nerve ________.
Definition
supplies innervation to the lateral rectus muscle of the eye
Term
Basic reflexes ________.
Definition
may be modified by learned behavior
Term
Which of the following is not true about the integration center of a reflex arc?
Definition
There are always multiple synapses with chains of interneurons.
Term
Striking the ʺfunny boneʺ is actually stimulation of the ________.
Definition
ulnar nerve
Term
Which of the following numbers of pairs of spinal nerves is correct?
Definition
twelve thoracic
Term
Select the statement about plexuses that is most correct ________.
Definition
Only ventral rami form plexuses
Term
A reflex that causes muscle relaxation and lengthening in response to muscle contraction is called a ________.
Definition
Golgi tendon reflex
Term
Pressure, pain, and temperature receptors are ________.
Definition
exteroceptors
Term
Potentially damaging stimuli that result in pain are selectively detected by ________.
Definition
nociceptors
Term
Meissnerʹs corpuscles ________.
Definition
are mechanoreceptors
Term
Which receptors adapt most slowly?
Definition
nociceptors
Term
The abducens nerve conveys proprioceptor impulses from the ________ to the brain.
Definition
lateral rectus muscle
Term
Nerves that carry impulses toward the CNS only are ________.
Definition
afferent nerves
Term
After axonal injury, regeneration in peripheral nerves is guided by ________.
Definition
Schwann cells
Term
Regeneration within the CNS ________.
Definition
is complicated by secondary demyelination
Term
In a crossed extensor reflex, if the right arm were grabbed it would flex and the left arm would ________.
Definition
extend
Term
In a crossed extensor reflex, if the right arm were grabbed it would flex and the left arm would ________.
Definition
extend
Term
Select the correct definition.
Definition
Pattern recognition allows us to see a familiar face.
Term
All processing at the circuit level going up to the perceptual level must synapse in the ________.
Definition
thalamus
Term
The sciatic nerve is a combination of which two nerves?
Definition
common fibular and tibial
Term
The largest and longest nerve of the body is found in the ________.
Definition
sacral plexus
Term
Irritation of a major nerve of this plexus may cause hiccups.
Definition
cervical plexus
Term
Bellʹs palsy ________.
Definition
is characterized by paralysis of facial muscles
Term
Babinskiʹs sign is ________.
Definition
when the great toe dorsiflexes and the other toes fan laterally
Term
A simple spinal reflex goes along which of the following reflex arcs?
Definition
receptor, afferent neuron, integration center, efferent neuron, effector
Term
Mixed cranial nerves containing both motor and sensory fibers include all except which of the following?
Definition
vestibulocochlear
Term
Transduction refers to conversion of ________.
Definition
stimulus information to nerve impulses
Term
________ always takes a nonspecific ascending pathway
Definition
Touch
Term
The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?
Definition
musculocutaneous
Term
The cranial nerves that have neural connections with the tongue include all except the ________.
Definition
trochlear
Term
Problems in balance may follow trauma to which nerve?
Definition
vestibulocochlear
Term
A fracture of the ethmoid bone would result in damage to which cranial nerve?
Definition
olfactory
Term
Select the statement that is most correct.
Definition
Afferent nerve fibers contain cell bodies of sensory neurons.
Term
An improperly delivered gluteal injection could result in ________.
Definition
sciatica
Term
Which nerve does not use the jugular foramen as a route of exit from the skull?
Definition
trigeminal
Term
The peripheral nervous system includes ________.
Definition
sensory receptors
Term
Feeling a gentle caress on your arm would likely involve all of the following except ________.
Definition
Pacinian corpuscles
Term
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?
Definition
facial
Term
The circuit level of the somatosensory system involves CNS centers in all of the following except the ________.
Definition
cerebral cortex
Term
The projection level of the brain does not include the ________.
Definition
basal nuclei
Term
If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?
Definition
a complete loss of voluntary movement
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