Spinal Chord Flashcards

1
Q

what are the motor divisions of the CNS?

A

Somatic and autonomic

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2
Q

what are the autonomic divisions of the CNS?

A

sypathetic and parasympathetc

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3
Q

what is responsible for the conduction of information between sensors, control centers and effectors?

A

spinal cord

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4
Q

what is responsible for the integration of reflexes?

A

spinal cord

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5
Q

what are meninges?

A

protective coverings of tissue

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6
Q

what contains neural cell bodies?

A

grey matterf

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7
Q

what contains tracts(myelinated axons)?

A

white matter

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8
Q

what tracts go from sensory to brain?

A

ascending tracts

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9
Q

where doe the first order neurons originate?

A

PNS

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10
Q

where do the second order neurons go?

A

enter the spinal cord

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11
Q

where do third order neurons go?

A

thalumus

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12
Q

what carries sensation of trunk position and movment, deep touch, cisceral pains and vibration?

A

Gracile Fasiculus or Cuneate Fasiculus

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13
Q

what carries sensation from below T6 to the thalamus?

A

Gracile Fasiculus

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14
Q

what carries sensation from above T6 to the thalamus?

A

cuneate fasiculus

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15
Q

what carries sensation of light touch, itch, temp, pain and pressure to the talumus?

A

spinothalamic

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16
Q

what carries sensations of pain from injury to the thalamus via reticular formation?

A

spinoreticular

17
Q

what carries information of muscle position (proprioception) to the cerebellum?

A

spinocerebellar

18
Q

what ascending tract does not have third order neurons?

A

spinocerebellar

19
Q

Of descending tracts where are the upper and lower neurons located?

A

upper: originate in the brain
lower: innervates muscle as a part of NMJ

20
Q

where does the synapse of descending tracts occur?

A

anterior gray horns

21
Q

what descending tract comes from the cebral cortex and is responsible for fine control of limbs?

A

corticospinal

22
Q

what descending tract comes from the midbrain( tectum) and is responsible for reflexive head and eye movements, and maintains head posture?

A

tectospinal

23
Q

what descending tract comes from reticular formation, and is responsible for balance and posure, pain awareness, and reduction?

A

reticulospinal

24
Q

what descending tract comes from vestibuspinal nuclei?

A

vestibuspinal

25
what are the lateral vestibuspinal tracts responsible for?
balance and posture relative to gravityy
26
what are the medial vestibuspinal tracts responsible for?
control of the head position relative to gravity
27
what are responsible for carrying sensory input and motor output based on locations?
spinal nerves
28
what are dermatomes and what can they do?
they are a region of skin that is innervated by nerves and can be used to locate spinal damage.
29
primary afferent neurons give information of what?
rate of change in muscle length
30
sencondary afferent neurons fives information of what?
length of muscle
31
what doe alpha motor neurons control?
extrafusal fibers
32
what does gamma motor neurons control?
intrafusal fibers
33
in a stretch reflex, as a muscle is stretched the tone...
increases, and there are rapid changes in the spinal cord, and slower changes in the brain
34
stretch reflexes help...
maintain posture and balance and stabilizes movement
35
what type of reflex uses reciprocal inhibition?
polysynaptic
36
what is it called when there is a contraction of agonist muscles and the relaxation of antagonists?
reciprocal inhibition
37
what are two example of polysynaptic reflexes?
withdrawl reflex and crossed extensor reflex?
38
what occure when there is an inhibition of aplpha neuron to muscle?
tendon reflex
39
tendon reflex occurs through the....
proprioceptors found in tendons