Neuro Spinal Cord

Front 1

what does the anterior horn do

Back 1

motor

Front 2

what does the post horn do?

Back 2

sensory

Front 3

if the ant horn does motor and the post does sensory, where would we expecet to find the biggest ones?

Back 3

cervical and lumbar, they supply the limbs

Front 4

where does the spinal cord end

Back 4

L1/L2

Front 5

what segemnt has hte most white matter, least

Back 5

most: cervical, lots of axons traveling

least: sacral, less axons, most have already done their thing

Front 6

what are 2 features of the thoracic SC

Back 6

1. lateral cell comumn with pregang symp cell bodies

2. nucleus of clarke, eyes in the grey matter

Front 7

what are the subdivisions of white matter in the SC

Back 7

posterior funniculuus
lateral funniculus
anterior funniculus

Front 8

starting at posterior what are the divisions of grey matter

Back 8

I- posteromarginal
II substantia gelatinosa
III/IV- nucleus proprius
VII- intermediate zone
IX- anterior horn

Front 9

how can you ID the divisions of grey matter

I
II
III/IV
VII
IX

Back 9

I- posteromarginal, post to sub gelatinosa

II- large white area in post horn

III/IV- nucleus propria, dark region

VII- intermediate zone, grey/white mix btwn the ant and post

IX- the ant horn (motor)

Front 10

when we look at a myelin stain what color are nuclei?

Back 10

dark

**nucleus of clark in thoracic, nucleus proprius within the grey matter

Front 11

what arteries supply the SC

Back 11

1. anterior spinal
2. posterior spinal (x2)

**ALL are branches of vertebral

Front 12

in a myelin stained section what does myelin look like, what does grey matter look like

Back 12

white: dark, 3 funniculi that have fiber tracts

grey: light, cell bodies and dendrites

Front 13

what runs in the median fissure

Back 13

ant spinal a

Front 14

where is the arterial vasocorona

Back 14

its the vessel that surrounds the superficial outside of the SC

**formed from anastamose btwn ant/post Spinal A

Front 15

other than the ant and 2 post spinal a are there any others that supply the SC

Back 15

segmental give rise to ant.post medularry

arterial vasocorona: supplies hte outer ridge of SC, superficial

Front 16

so the segmental a give rise to spinal medulary a.

these are arteries in addition to the 3 major arteries.

where are segmental a from

Back 16

different vessels in dif locations

1. ascending cervical
2. vertebral
3. vertebral
4. intercostal
5. lumbar

Front 17

what is the venous pattern of SC drainaige

Back 17

more variable
NO valves
ant/post spinal veins

Internal (btwn bone and dura) AND external plexus (outside the vertebrae)

Front 18

sensory is in the ________

motor is inthe _______

Back 18

post horn, root, ganglion (

ant horn

Front 19

exteroceptive
proprioceptive
interoceptive

Back 19

extero: pain, temp, touch
proprio: tendons, mm, joints
intero: pain from viscera

Front 20

what are the sensory NT

Back 20

glutamate
Substance P
CGRP

Front 21

what allows you to move your elbow with your eyes closed

what tells you your heart hurts

how do you know when its hot

**name the "ceptive" nad the NT

Back 21

proprioceptive

interoceptive: pain from viscera

exteroceptive: pain temp touch

**glut, Sub P, CGRP

Front 22

what are the motor division of the ant (2 major)

Back 22

1. SE: motor to sk mm

2. VE: symp (t1-L2) and para (S2-S4) SM and glandular innervation

Front 23

how are glands nad SM innervated

Back 23

motor innervation via symp and parasymp

Front 24

what are the motor NT
what are the sensory NT

Back 24

Ach
Sub P, Glut, CGRP

Front 25

what is the organization of the anterior horn

Back 25

anterior: extensors
Posterior: flexors

Lateral: distal mm
Medial: proximal mm

Front 26

so an ascending or descending "tract" is made of what

Back 26

white matter, axons

Front 27

tract is white matter, what is another word for that

Back 27

fasciculus

Front 28

what are the 5 major ascending tracts in the SC

Back 28

1. anterolateral system
2. gracile funiculus
3. cuneate fasciculus
4. posterior spinocerebellar tract
5. anteior spinocerebellar tract

Front 29

where are the tracts...

cuneate
ALS
posterior spinocerebellar
anterior spinocerebellar
gracile

Back 29

cuneate: lateral part of post funiculus
ALS: mediala to ant spinocerebellar
post cpinocerebellar: superficial, lateral to lateral cortocospinal tract
anterior spinocerebellar: superficial, lateral to ALS
Gracile: medial part of post funiculus

Front 30

what is found in a spinal nerve

Back 30

mixed motor (SE, VE) and sensory (SA, VA, proprioception)

Front 31

so what does it do...

ascending tracts
Gracilis
Cuneate
ALS
Ant/Post spinocerebellar

Back 31

ascending, SENSORY (exteroceptive, proprioceptive, interoceptive)

Gracilis/Cuneate: (medial lemniscus system), FINE touch (localized) and conscious proprioception

ALS: exteroceptive, CRUDE (poor localization) touch pain temp.

Ant/Post: spino cerebellar: nonsconscious proprioception

Front 32

what tells us if generally we have something touching us,even if we cant tell where exactly it is

Back 32

ALS

Non descriminatve pain temp touch (Glut, Sub P, CGRP)

Front 33

what tells us subconsciously where our body is in spave

Back 33

ant/post spinocerebellar ascending tract

Front 34

what part of the SC has conscious proprioception, does this part of the brain do antthing else

Back 34

posterior column (medial lemniscal system) gracile/cuneate

**also does fine (localized) touch

Front 35

what does pain/temp
what does fine/crude touch

Back 35

ALS: crude touch, pain, temp

Medial Leminscal (post column) gracile/cuneate: localized touch (as well as conscious proprioception)

Front 36

what are the descending (MOTOR) tracts of the SC

Back 36

1. lateral corticospinal tract
2. rubrospinal tract
3. anterior corticospinal tract
4. vestibulospinal tract
5. medial retuculospinal tract
6. lateral reticulospinal tract
7. medial longitudinal fasciculus

Front 37

what do the descending tracts do?

lateral corticospinal
rubrospinal tract
medial corticospinal
vestibulospinal
reticulospinal

Back 37

lateral corticoapinal & rubrospinal: limb/trunk FLEXION

VestibuloSpinal & Reticulospinal: limb trunk EXTENSION

MLF (medial longitudinal fasciculis) & medial vestibulospinal tract: vestibular

Front 38

in general the ant part of both the descending tracts and the ant part of the ant horn do what

Back 38

EXTENSORS od limb & trunk

Descending tracts: med/lat reticulospinal & vestibulospinal

Front 39

in general the post part of the SC, decending and ant horn, does what

Back 39

FLEXORS of the limb and trunk

Descending tracts: lateral corticospinal, rubrispinal

Front 40

what descending tract controls the vestibular system

Back 40

medial longitudinal fascuculus (and some medial vestibulospinal tract)

Front 41

what keeps you balanced

Back 41

MLF (medial longitudinal fascuculus)

and SOME vestibular

Front 42

the vestibulospinal tract is involved in what

Back 42

1. extension of trunk/limb
2. SOME vestibular systhem though most is MLF

Front 43

what tracks are present in the sacral SC

Back 43

not very many, remember most white matter is already gone at this pt

1. gracile: fine touch, conscious perception

2. lateral corticospinal tract: flex limb/trunk

3. ALS: crude touch, pain, temp

4. reticulospinal: extend trunk/limb

Front 44

what tracts are present on Lumbar SC

Back 44

1. gracilis: fine touch, conscious perception
2. lateral corticospinal: flex limb/trunk
3. RUBRISPINAL tract: flex limb (UE)/trunk
4. ALS: crude touch, pain, temp
5. reticulospinal: extension of limb/trunk
6. vestibulospinal: superficial anterior, extend of limb/trunk
7. MLF: vestiblular
8. Ant corticospinal: ???

Front 45

the graciles nad cuneate do what.... how do they differ

Back 45

fine touch and conscious proprioception

**the cuneate is lateral and does UE, found in thoracic and up (NOT lumbar/Sacral)

**the gracilis is medial and does LE

Front 46

in the ant horn medial does proximal andlateral does distal, is this relationship true in the gracile and cineate

Back 46

nope

Gracile is medial and does fine touch and conscious proprioception in the leg

Cuneate, lateral does ARM

Front 47

what tracts are present in the throacic SC

Back 47

1. gracilis: leg
2. cuneate: arm
3. lateral corticospinal: flex limb/trunk
4. rubrospinal: flex trunk/limb UE
5. post spinocerebellar: proprioception (nonconscious)
6. anterior spinocerebellar: proprioception, nonconscious
7. ALS: crude touch, pain, temp
8. reticulospinal: lateral to grey, Flexion of limb/trunk
9. MLF: vestibular
10. Ant corticospinal: ??/

Front 48

what tracts are present at the C7 level

Back 48

ALL

Descending:
1. lateral corticospinal
2. rubrospinal: UE
3. anterior corticospinal
4. med reticulospinal
5. lateral reticulospinal
6. MLF
7. Vestibulospinal

ASCENDING:
1. cuneate
2. gracile
3. ALS
4. Ant spinocelebellar
5. Post Spinocerebellar

Front 49

where do desceending axons terminate

Back 49

areas in the grey matter of ant horn

***on a myelin stain there are dark areas here, this is what we are talkign about.

Front 50

what are the general areas of blood supply in the internal SC

Back 50

1. post spinal A: posterior faniculus (gracile, cuneate)

2. Ant spinal A: lateral and ant funiculus

3. Arterial Vasocorona: superficial edge of ant/lateral funiculus

Front 51

an occlusion of the PSA would affect what spinal cord structures

Back 51

gracile
funiculus