Nervous System: Spinal Cord and Peripheral Nerves Chapter 11

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Terms in this set (...)

motor
descending tracts
sensory
carries information for touch, pressure, and pain
motor
corticospinal tract
motor
pyramidal tract
sensory
ascending tracts
motor
electrical signal arises in the precentral gyrus of the frontal lobe
sensory
carries information to the parietal lobe
motor
most neurons decussate in the medulla oblongata
motor
extrapyramidal tracts
sensory
spinothalamic tract
sensory
I feel pain in my little finger
sensory
I'm wiggling my toes
sensory
I'm cold
motor
I'm winking
sensory
I'm hearing voices
sensory
spinocerebellar
withdrawal reflex
a protective reflex; quickly moves your finger away form a hot object
patellar tendon reflex
this reflex helps you maintain a standing posture; also called the knee-jerk reflex
baroreceptor reflex
this reflex helps your body maintain a normal blood pressure
babinski reflex
this reflex is elicited by stroking the sole of the foot; plantar flexion and curling of the toes are normal responses in an adult
pupillary reflex
this reflex causes the pupils of the eyes to constrict (become smaller) in response to light
Achilles tendon reflex
a stretch reflex; tapping this tendon in the heel normally causes plantar flexion of the foot; also called the ankle-jerk reflex
gag reflex
this reflex involves the glossopharyngeal nerve and helps prevent food and water from going down the wrong way
vestibulocochlear
senses hearing and balance
vagus
the wanderer; widely distributed throughout thoracic and abdominal cavities
hypoglossal
helps control the movements of the tongue; cranial nerve XII
accessory
allows you to shrug your shoulders
optic
damage to this nerve causes blindness
olfactory
sense of smell
trigeminal
tic douloureux, a condition characterized by extreme facial and jaw pain, is caused by inflammation of this nerve; triggers include eating, shaving, and exposure to cold temperatures
oculomotor
a dilated and fixed pupil is caused by pressure on this nerve
facial
inflammation of this nerve causes Bell's palsy, a paralysis of one side of the face
oculomotor
nerve that supplies most of the extrinsic eye muscles, primary function is the movement of the eyeballs
optic
carries sensory information from the eyes to the occipital lobe of the brain
oculomotor
in addition to mobbing the eyeball, this nerve raises the eyelid and constricts the pupil of the eye
olfactory
anosmia
vestibulocochlear
cranial nerve VIII
vestibulocochlear
ototoxicity
oculomotor
ptosis of the lids
optic
cranial nerve II
vestibulocochlear
vertigo
facial
cant smile, wrinkle foehead, secrete tears, or close eyes (on the affected side)
vagus
cranial nerve X
radial
wrist drop is caused by damage to this nerve
axillary
crutch palsy is caused by damage to this nerve
phrenic
nerve that supplies the diaphragm, an important breathing muscle
plexus(es)
spinal nerves are grouped and sorted here
sciatic
this large nerve leaves or emerges from the distal end of the spinal cord and supplies the buttocks and posterior thighs
plexus(es)
nerve groupings that are described as cervical, brachial, and lumbosarcral nerves
pudendal
deadening of this nerve assists in childbirth
cauda equina
group of nerves that emerge from the distal end of the spinal cord; horse's tail
femoral
innervates the inner thigh area
common peroneal
if damaged, causes footdrop
sciatic
must administer an intramuscular (IM) injection in the upper outer quadrant of the buttocks to avoid jumping this nerve
phrenic
severing this nerve requires the use of a ventilator
What is most descriptive of a descendign tract?
motor
What is most likely to experience ototoxicity?
a person who took an antibiotic drug that injured CN VIII
The pyramidal tract is
the major motor tract that originates in the precentral gyrus
A student nurse is instructed to administer an IM in injection in the upper outer quadrant of the buttocks to
avoid injury to the sciatic nerve
What is a function of the spinal cord?
acts as an important reflex center
What is the purpose of myelination?
increases the speed of the nerve impulse
What is least descriptive of a the vagus nerve?
an inflamed vagus nerve causes Bell's palsy
What is most descriptive of the cauda equina?
spinal nerves that emerge from the tail end of the spinal cord
Diagnostically, a needle is inserted between the third and fourth lumbar vertebreae into the subarachnoid space to
obtain a sample of cerebrospinal fluid
These nerves supply voluntary skeletal muscles, causing movement
somatic motor nerves
A mixed nerve is one that
contains both sensory and motor fibers
What involuntary response to a stimulus is accomplished by these four structures - receptor, sensory neuron,motor neuron,effector organ?
reflex arc
What is the effect organ in the knee - jerk or patellar tendon reflex?
quadriceps femoris muscle
What is least descriptive of the oculomotor nerve?
carries sensory information from the eye to the occipital lobe (vision)
What is a consequence of damage to the glossopharyngeal nerve?
loss of the gag reflex and aspiration fo food
The phrenic nerve
innervates the major breathing muscle
The first three cranial nerves
are the olfactory, optic, and oculomotor nerves
Who likes to have the sole of his foot stroked?
Babinksi