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PT 631 Neuroanatomy > Transmission of Sensory Information: To Cortex > Flashcards

Transmission of Sensory Information: To Cortex Flashcards

1
Q

gray in the spinal cord is arranged into dorsal and ventral horns that are connected via ____ of interneurons

A

commissure

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2
Q

where does lateral horn appear in spinal cord

A

T1-L2/3

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3
Q

gray matter in spinal cord is arranged into what

A

dorsal and ventral honrs

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4
Q

white matter is arranged in the spinal cord into

A

ascending and descending columns

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5
Q

multiple inputs go to the brain and the brain will do multiple things with the information

A

parallel sensory processing (ex: motor response, “ow” and making memory)

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6
Q

how is gray matter organized in the spinal cord

A

laminae

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7
Q

layers

A

laminae

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8
Q

what are the main function of lamina 1-6

A

sensory

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9
Q

what is the other name for lamina II

A

substantia gelatinosa

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10
Q

what does lamina II receive input from

A

pain, temperature, crude touch

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11
Q

what do lamina III/IV receive input from

A

mechanical (vibration, stretch, tension) and temperature

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12
Q

what do lamina V/VI receive input from

A

proprioception

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13
Q

what lamina is considered the intermediate zone

A

lamina VII

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14
Q

what two parts are found in lamina VII

A

clarke’s nucleus and nucleus intermediolateralis

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15
Q

unconscious proprioception to cerebellum

A

clarke’s nucleus

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16
Q

ANS sympathetic cell bodies (T1-L2)

A

nucleus intermediolateralis (lateral horn)

17
Q

interneurons

A

lamina VIII

18
Q

ventral horn, lower motor neurons organized somatotropically

A

lamina IX

19
Q

interneurons that surround central canal (H)

A

lamina X

20
Q

dorsal horn gray matter for discriminative touch, pressure, vibration, proprioception and kinesthesia to the dorsal columns enter the ____ laminae

A

medial

21
Q

dorsal horn gray matter for temp, crude touch, pain information to anterior/lateral enters _____ laminae

A

lateral

22
Q

ventral horn gray matter for cell bodies, axial trunk, and pelvic/shoulder girdles are _____

A

medial

23
Q

ventral horn gray matter for limbs are ____ and only found in cervical and lumbar segments

A

lateral

24
Q

bundle of axons in the spinal cord/brain with same origin and a common termination may be called

A

tract, column, lemniscus, fascicle, fasiculus

25
Q

how are pathways named in white matter

A

by origin and termination

26
Q

what are the 3 ascending (sensory) tracts in white matter

A

anterolateral spinothalamic (ALS)
dorsal column/medial lemniscus (DCML)
spinocerebellar

27
Q

what are the two types of white matter tracts in the spinal cord

A

long ascending and descending bundles of axons
local/intrinsic tracts

28
Q

arise from interneuron cell bodies in spinal gray matter, are myelinated axons that travel near gray borders, and link interneurons at multiple levels

A

propriospinal/spinospinal system

29
Q

transmits discriminative touch, pressure, vibration, proprioception/kinesthesia

A

DCML (dorsal column medial lemniscus)

30
Q

examples of DCML receptors

A

deep mechanoreceptors, muscle spindles, GTOs

31
Q

transmits crude touch, pain, temp; superficial receptors found in skin, muscles, joints, viscera

A

ALS (anterolateral spinothalamic)

32
Q

examples of ALS receptors

A

thermoreceptors, nocieceptors, mechanoreceptors

33
Q

transmits touch, pressure, unconscious proprioception from C8-L2 segments

A

spinocerebellar

34
Q

what are the functions of the 3 spinal cord pathways

A
  1. direct conduit for discriminitive touch, vibration, and proprioceptive info from DCML to thalamus with no synapses in spinal cord
  2. process and modify sensory info from ALS to synapses in the spinal cord 1 or 2 levels above entry before going to thalamus
  3. governs reflexes and inhibitory circuits that coordinates motor output by way of interneurons via propriospinal system
35
Q

unconscious proprioceptions, pressure, vibratory information from peripheral receptors

A

spinocerebellar tracts

PT 631 Neuroanatomy (17 decks)

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