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69 Cards in this Set

  • Front
  • Back
spinal cord
continuation of the brain stem
white matter
composed of primarily myelinated axons
lumbar puncture
procedure of sticking a hollow needle into the subarachnoid space between l3 and l4 above the leverl of the top of the hip bone.
gray matter
location in the center of the spinal cord, shaped like a butterfly, compsed of cell bodies and internuerons
central canal
opening, or hole, that extends the entire length of the spinal cord located in the middle of the gray matter
nerve tracts
the neuronal axons grouped together
acending tracts
sensory tracts that carry info from the perifhery to the spinal cord toward the brain
descending tracts
motor tracts carrying info from the brain down the spinal cord and toward the peripheral
2 major descending tracts
pyramidal and extrapyramidal tracts
pyramidal tract
aka corticospinal tract major motor tract originates in frontal lobe of cerebrum carried from the cortical region of the brain toward the spinal cord
spinal nerves
atatched at spinal cord by two roots dorsal and ventral root
two roots attatched at spinal cord
dorsal and ventral
sensory nerve
collection of sensory nuerons that carry info toward the cns
dorsal root
sensory nerve of a spinal nerve as it attatches to the spinal cord
dorsal root ganglia
cell bodies of the sensory fibers are gathered together
ventral root
composed of motor fibers distributed to muscles and glands
mixed nerves
spinal nerves containing both sensory and motor fibers
reflex
an involuntary response to a stimulus
patellar
aja knee-jerk reflex, tapping the tendon bellow knee cap
reflex arc
nerve pathway involved in a relex 4 components of arc: receptor, afferent neuron, efferent nueron, effector organ
receptor
sensory receptors on the thigh
4 component of an arc
receptor, afferent nueron, efferent nueron, effector organ
afferent nueron
sensory nueron
efferent nueron
motor nueron
effector organ
muscle of the thigh, specifically the quadraceps femoris
pupillary reflex
regulates the amount of light that enters the eye
baroreceptor reflex
causes the heart and blood vessels to respond in a way that restores blood pressure to normal
Babin skin relex
stroking the lateral sole of the foot in the direction of heel to toe with a hard blunt object
cranial nerves
has a specific number always designated by roman numberl and name. order is the nerves that exit from front to back
12 cranial nerves
olfactor; optic; oculomotor; toclear; trigeminal nerve; aducens; facial; vestibulocochlear; glossoparyngea; vagus; accessory; hypoglossa;
ventral root
composed of motor fibers distributed to muscles and glands
mixed nerves
spinal nerves containing both sensory and motor fibers
reflex
an involuntary response to a stimulus
patellar
aja knee-jerk reflex, tapping the tendon bellow knee cap
reflex arc
nerve pathway involved in a relex 4 components of arc: receptor, afferent neuron, efferent nueron, effector organ
receptor
sensory receptors on the thigh
4 component of an arc
receptor, afferent nueron, efferent nueron, effector organ
afferent nueron
sensory nueron
efferent nueron
motor nueron
effector organ
muscle of the thigh, specifically the quadraceps femoris
pupillary reflex
regulates the amount of light that enters the eye
baroreceptor reflex
causes the heart and blood vessels to respond in a way that restores blood pressure to normal
Babin skin relex
stroking the lateral sole of the foot in the direction of heel to toe with a hard blunt object
cranial nerves
has a specific number always designated by roman numberl and name. order is the nerves that exit from front to back
12 cranial nerves
olfactor; optic; oculomotor; toclear; trigeminal nerve; aducens; facial; vestibulocochlear; glossoparyngea; vagus; accessory; hypoglossa;
spinal cord
continuation of the brain stem
white matter
composed of primarily myelinated axons
lumbar puncture
procedure of sticking a hollow needle into the subarachnoid space between l3 and l4 above the leverl of the top of the hip bone.
gray matter
location in the center of the spinal cord, shaped like a butterfly, compsed of cell bodies and internuerons
central canal
opening, or hole, that extends the entire length of the spinal cord located in the middle of the gray matter
nerve tracts
the neuronal axons grouped together
acending tracts
sensory tracts that carry info from the perifhery to the spinal cord toward the brain
descending tracts
motor tracts carrying info from the brain down the spinal cord and toward the peripheral
2 major descending tracts
pyramidal and extrapyramidal tracts
pyramidal tract
aka corticospinal tract major motor tract originates in frontal lobe of cerebrum carried from the cortical region of the brain toward the spinal cord
spinal nerves
atatched at spinal cord by two roots dorsal and ventral root
two roots attatched at spinal cord
dorsal and ventral
sensory nerve
collection of sensory nuerons that carry info toward the cns
dorsal root
sensory nerve of a spinal nerve as it attatches to the spinal cord
dorsal root ganglia
cell bodies of the sensory fibers are gathered together
how many spinal nerves
how many cranial nerves
spinal 31
cranial 12
list the cranial nerves
cervical c1-8; thoracuc t1-12; lumbar L1-L5; sacral s1-5; coccygeal co1
cauda equina
A bundle of spinal nerve roots that arise from the bottom end of the spinal cord. The cauda equina comprises the roots of all the spinal nerve roots below the level of the first lumbar (L1) vertebra, namely the sacral and coccygeal nerves. So named because it resembles the tail
nerve plexuses
various points, nerve fibers converge or come together 3 major plexuses brachial lumbosacral cervical
cervical plexuses
c1-c4 skin muscles of the neck and shoulder; diaphram
brachial plexuses
c5-c8 and t1 skin and muscles of the upper extrmities
lumbosacral plexuses
512, L1-5 and s1-4 skin and muscle of lower torso and lower extrmities
dermatome
spinal nerve innervates a particular are of the skin, this distribution of nerves is dermatome
functional classification of the pns
bring sensory and motor info from different parts of the body autonomic nervous system composed of nerves that supply the organs and glands