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A&P Unit 3 Lecture > Spinal Chord > Flashcards

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
Q

what are the lateral vestibuspinal tracts responsible for?

A

balance and posture relative to gravityy

26
Q

what are the medial vestibuspinal tracts responsible for?

A

control of the head position relative to gravity

27
Q

what are responsible for carrying sensory input and motor output based on locations?

A

spinal nerves

28
Q

what are dermatomes and what can they do?

A

they are a region of skin that is innervated by nerves and can be used to locate spinal damage.

29
Q

primary afferent neurons give information of what?

A

rate of change in muscle length

30
Q

sencondary afferent neurons fives information of what?

A

length of muscle

31
Q

what doe alpha motor neurons control?

A

extrafusal fibers

32
Q

what does gamma motor neurons control?

A

intrafusal fibers

33
Q

in a stretch reflex, as a muscle is stretched the tone…

A

increases, and there are rapid changes in the spinal cord, and slower changes in the brain

34
Q

stretch reflexes help…

A

maintain posture and balance and stabilizes movement

35
Q

what type of reflex uses reciprocal inhibition?

A

polysynaptic

36
Q

what is it called when there is a contraction of agonist muscles and the relaxation of antagonists?

A

reciprocal inhibition

37
Q

what are two example of polysynaptic reflexes?

A

withdrawl reflex and crossed extensor reflex?

38
Q

what occure when there is an inhibition of aplpha neuron to muscle?

A

tendon reflex

39
Q

tendon reflex occurs through the….

A

proprioceptors found in tendons

A&P Unit 3 Lecture (7 decks)

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