Transmission of Sensory Information: To Cortex

Question 1

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

Answer 1

commissure

Question 2

where does lateral horn appear in spinal cord

Answer 2

T1-L2/3

Question 3

gray matter in spinal cord is arranged into what

Answer 3

dorsal and ventral honrs

Question 4

white matter is arranged in the spinal cord into

Answer 4

ascending and descending columns

Question 5

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

Answer 5

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

Question 6

how is gray matter organized in the spinal cord

Answer 6

laminae

Question 7

layers

Answer 7

laminae

Question 8

what are the main function of lamina 1-6

Answer 8

sensory

Question 9

what is the other name for lamina II

Answer 9

substantia gelatinosa

Question 10

what does lamina II receive input from

Answer 10

pain, temperature, crude touch

Question 11

what do lamina III/IV receive input from

Answer 11

mechanical (vibration, stretch, tension) and temperature

Question 12

what do lamina V/VI receive input from

Answer 12

proprioception

Question 13

what lamina is considered the intermediate zone

Answer 13

lamina VII

Question 14

what two parts are found in lamina VII

Answer 14

clarke’s nucleus and nucleus intermediolateralis

Question 15

unconscious proprioception to cerebellum

Answer 15

clarke’s nucleus

Question 16

ANS sympathetic cell bodies (T1-L2)

Answer 16

nucleus intermediolateralis (lateral horn)

Question 17

interneurons

Answer 17

lamina VIII

Question 18

ventral horn, lower motor neurons organized somatotropically

Answer 18

lamina IX

Question 19

interneurons that surround central canal (H)

Answer 19

lamina X

Question 20

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

Answer 20

medial

Question 21

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

Answer 21

lateral

Question 22

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

Answer 22

medial

Question 23

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

Answer 23

lateral

Question 24

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

Answer 24

tract, column, lemniscus, fascicle, fasiculus

Question 25

how are pathways named in white matter

Answer 25

by origin and termination

Question 26

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

Answer 26

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

Question 27

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

Answer 27

long ascending and descending bundles of axons local/intrinsic tracts

Question 28

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

Answer 28

propriospinal/spinospinal system

Question 29

transmits discriminative touch, pressure, vibration, proprioception/kinesthesia

Answer 29

DCML (dorsal column medial lemniscus)

Question 30

examples of DCML receptors

Answer 30

deep mechanoreceptors, muscle spindles, GTOs

Question 31

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

Answer 31

ALS (anterolateral spinothalamic)

Question 32

examples of ALS receptors

Answer 32

thermoreceptors, nocieceptors, mechanoreceptors

Question 33

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

Answer 33

spinocerebellar

Question 34

what are the functions of the 3 spinal cord pathways

Answer 34

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

Question 35

unconscious proprioceptions, pressure, vibratory information from peripheral receptors

Answer 35

spinocerebellar tracts