S4: Anatomy of the Spinal cord

Question 1

Name:

the pathways, their sites of origin, and a general statement of their function.

Answer 1

lateral corticospinal tract

function – voltunary movement, particular discete digit movements

pathology – same side paralysis of distal muscles below lesion

origin – cortex

termination – gray matter at all spinal segments

Question 2

name, origin, termination, function?

Answer 2

gracile fasiculus

origin – epicritc (DML) and proprioceptive (dorsal spinocerebellar) info from lower body

terminate – gracile nucleus in the medulla

X - ipsilateral loss of epicritic below the lesion

Question 3

name, origin, termination, function?

Answer 3

cuneate fasculus

from – carries epicritic and proprioceptive from upper half of the body

terminates – cuneate nculeus in the medulla

X - ipsilateral loss of epicritc below the lesion

Question 4

name, origin, function?

Answer 4

hypothalamo-reticulo-spinal tract

function – caries pregang. symps to the IML

from – the hypothalamus and reticular formation

to – IML

X – same side horners syndrome

Question 5

name, origin, termination, function?

Answer 5

Anterolateral tract

function – carries propathic (simple toucn pressure pain temp) from opposite side of the body

pathology - CONTRLATERAL loss of propathic sensation

origin - sensory neurons in dorsal horn

termination - brainstem reticular formation and other parts of midbrian, thalamus (VPL, DM, and intralamianr nuceli)

Question 6

name, origin, function?

Answer 6

ventral / anterior corticospinal tract

function - voluntary moivement, particularly axial and proximal muscle

origin - cortex

to - itnermediate grea area

Question 7

name, origin, termination, function?

Answer 7

Lissauer’s tract (dorsolateral tract )

function - transmists small diamter axons (like ALS) carrying pain and temp to dorsal horn

origin - pain and temp neurons

to - dorsal horn

Question 8

identify or name the sites of origin and termination and basic function(s)

Answer 8

gracile fasciculus

function — carries epicritic from lower body

pathology – loss of epicritc info below the lesion on the same side

Question 9

identify or name the sites of origin and termination and basic function

Answer 9

cuneate fascilulus

function – carries epicritc information from the upper body

X - ispilateral loss of epicritic below the lesion

Question 10

Answer 10

ventral corticospinal tract

function – voltunary movement

pathology - ispilateral paralysis of proximal muscle below the lesion

Question 11

Answer 11

hypothalamo-reticulo-spinal tract

function - carries pregang parasymps

from - hypothalamus and reticular formation

to - IML

pathology - same side horners

Question 12

function, origin, termination, pathology

Answer 12

dorsal spinocerebellar tract

function - carries prroprioceptive ifnromation to the cerebellum from the lower half of the body

from: propriosptive sensory neurons via gracile fasciulus and clarks nucleus
temrinate: cerebellum via the inferior cerebellar peduncle

Question 13

Answer 13

rubrospinal tract (not apparent caudal to the cervical enlargement)

function – distal motor control

pathology – ipsilateral loss of distal motor control elow lesion

from – red nculeus

to – lateral protion of grey matter

Question 14

Answer 14

Lissauer’s tract (dorsolateral tract )

carries pain and temp information

Question 15

Answer 15

. ventral (anterior) corticospinal tract

• ipsilateral voluntary muscle control, to more proximal muscles

Question 16

Answer 16

gracile fasciculus

carries epicritc from DML

and proprioceptive from spinocerebellar

for lower part of body

Question 17

Answer 17

cuneate fasciculus

Question 18

Answer 18

rubrospinal tract

function – voluntary motor control

origin – red nucleus

to: lateral portions of gray matter

Question 19

Answer 19

lateral corticospinal tract

Question 20

Answer 20

ALS

Question 21

Answer 21

hypothalamo-reticulo-spinal tract

carries pregang parasymps to IML

X - ipsilateral horners syndrome

Question 22

Answer 22

gracile fasciculus

Question 23

Answer 23

ventral (anterior) corticospinal tract

Question 24

Answer 24

lateral corticospinal tract

Question 25

Answer 25

**rubrospinal tract**

Question 26

Answer 26

anterolateral tract

Question 27

Answer 27

gracile fasciculus

Question 28

Answer 28

Lissauer’s tract

Question 29

Answer 29

lateral corticospinal tract

Question 30

Answer 30

anterolateral

Question 31

red what does this carry? what does X to this cause?

Answer 31

dorsal funiculus epicritic information Loss of discrete somesthetic infromation on same side of the lesion

Question 32

blue

Answer 32

lateral funiculus

Question 33

what do these contain?

Answer 33

anterior ventral funiculus ascending and descending nerve tracts

Question 34

Answer 34

intermediate area

Question 35

where are the lateral motorneurons enlarged?

Answer 35

brachial and lumbosacral enlargements (A and C)

Question 36

Answer 36

lateral motor cell column

Question 37

Answer 37

intermedial cell column (in the throacic levels)

Question 38

What is the approximate segmental arrangement of this slide? Limb or non-limb?

Answer 38

Upper cervical - neck and back, respiration

Question 39

What is the approximate segmental arrangement of this slide? Limb or non-limb?

Answer 39

Lower cervical - upper limb, proximal arm is more rostral

Question 40

What is the approximate segmental arrangement of this slide? Limb or non-limb?

Answer 40

thoracic - lower back and stomach

Question 41

What is the approximate segmental arrangement of this slide? Limb or non-limb?

Answer 41

lumbosacral - lower back, proximal leg is more rostral

Question 42

What is the approximate segmental arrangement of this slide? Limb or non-limb?

Answer 42

sacral - pelvis

Question 43

Answer 43

extrapyramidal tracts

Question 44

Answer 44

lateral cortical spinal tract

Question 45

Answer 45

extrapyramidal tract

Question 46

Answer 46

extrapyramidal tract

Question 47

Answer 47

extrapyramidal tract

Question 48

Answer 48

extrapyramidal