Gray matter config

Question 1

Nucleus dorsomarginalis- location, levels, function

Answer 1

dorsal, all levels

Pain and temp sensation (from lissaeurs tract)

Question 2

Substantia gelatinosa- loc, levels, function

Answer 2

dorsal, all lvls

Relays pain, temp, touch

Question 3

Nucleus proprious- loc, levels, function

Answer 3

dorsal, all lvls

relays mechanical and temp sensation to brain

Question 4

Nuckeus dorsalis of clarke- loc, lvls, func

Answer 4

lateral horn, t1-L2

relays unconsious proprioceptive info

Question 5

Intermediomedial and interomediolat nuc- loc,lvls, func

Answer 5

lat horn, t1-l2

Relays sensory info from viscera to brain (autonomic signals)

Question 6

Sacral parasympathetic nucelus- loc, lvls, func

Answer 6

Lat horn, S2-4

Parasympathetic pre ganglionic axon buncles

Question 7

Medial motor nuc- loc, lvls, func

Answer 7

Ventral horn, all lvls

Supplies axial muscles

Question 8

Lat motor nuc- loc, lvls, func (dorsal and ventral func)

Answer 8

Ventral horn, c5-t1, L2-S3

Supplies mm of upper and lower limbs
dorsal- flexor mm
ventral- ext mm

Question 9

Spinal accessory nuc- loc, lvls, func

Answer 9

ventral C1-5 (lat motor nuc replaces this after)

supplies scm and traps

Question 10

Phrenic nucleus- loc, lvls, func

Answer 10

Ventral, c3-5 supplies mm of diaphram

Question 11

Onufs nuc- loc, lvls, func

Answer 11

Ventral, s2-4

supply muscles of perineum (urine/feces)

Question 12

Lamina 1- corresponding nuc and flow+ function

Answer 12

(nucleus dorsomarginalis)

sends pain/temp/touch (bad) to contralat lateral spinothalamic tract

Question 13

Lamina 2- corresponding nuc and Flow+ function

Answer 13

(substantia gelantonosa)

• transmits slow pain conduction to lamina 3/4
• modulates pain before sending info

Question 14

Lamina 3/4- corresponding nuc and Flow+ func

Answer 14

(Nucleus proprius)

Mediates pain/temp/touch from lamina 2
contributes to contralat lat spinothalmic tract (pain/temp) and ant spinothalamic tract (crude touch)

Question 15

Lamina 5/6- corresponding nuc and flow + func

Answer 15

(nucleus proprius)

Proprioceptive signals from jnts (medial part recieves direct info while lat gets collaterals to modulate)

Sends info to contralat lateral spinothalamic tract and ant spinothalamic tract

Question 16

Lamina 7- corresponding nuc, flow + func

Answer 16

(dorsal nucleus of clarke)

axons go to dorsospinal cerebellar tract (posture signals), below L3 axons cross midline and go to ventral spinocerebellar tract

also functions as general visceral sensation

Question 17

Lamina 8- corresponding nuc, flow + func

Answer 17

(commissural nucleus)

recieves axons from vestibulospinal and reticulospinal tracts
-modulates firing of postural muscles

Question 18

Lamina 9- corresponding nuc, flow + func (med and lat)

Answer 18

(motor nuclear groups)

Large A and G motor neurons
recieve info from lat corticospinal and rubrospinal tracts

voluntary motor control (med- axial mm, lat upper/lower limbs)

Question 19

Lamina 10- loc, function

Answer 19

Porion of gray matter surrounding central cannal

- holds the decussating fibres