6 spinal cord and ascending tracts

Question 1

Where is the grey matter located in the spinal cord?

Answer 1

Centrally

Question 2

posterior horn of grey matter?

Answer 2

Sensory

Question 3

intermediate horn of grey matter?

Answer 3

Autonomic

Question 4

anterior horn of grey matter?

Answer 4

Motor

Question 5

Where is the spinal white matter located?

Answer 5

Peripherally

Question 6

posterior columns of spinal white matter?

Answer 6

sensory

Question 7

lateral column of spinal white matter?

Answer 7

mixed motor and sensory

Question 8

anterior column of spinal white matter?

Answer 8

mixed

Question 9

what is the name given to the bundle of nerve fibres crossing the midline of the spinal cord?

Answer 9

white commissure

Question 10

what is the difference between white and grey matter?

Answer 10

grey matter contains cell bodies, dendrites and axon terminals
white matter is just the axons connecting the grey matter together

Question 11

does the motor root have a ganglion?

Answer 11

no. dorsal root ganglion is only found on sensory/dorsal root

Question 12

How many segments is the spinal made up of?

Answer 12

31 segments; 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal

Question 13

Where are the names given to the two spinal cord bulges?

Answer 13

cervical (arm/hand innervation) and lumbar (leg/foot innervation)

Question 14

How does white matter change up the spinal cord?

Answer 14

increases (accumulated neuronal traffic to and from the brain)

Question 15

How does grey matter change up the spinal cord?

Answer 15

Change is minimal except at bulges; v substantial

Question 16

Why are roots long at cord end?

Answer 16

Spine grows faster than cord during development therefore lower segments are much higher than their level of exit

Question 17

What is the cauda equina?

Answer 17

Collection of nerves in the vertebral canal (occurs as no spinal cord- only sensory and motor routes

Question 18

How can CSF be sample?

Answer 18

LUMBAR PUNCTURE; csf sample from sub arachnoid space well below L2.. usually L4/5

Question 19

What does each spinal root contain?

Answer 19

nerve fibre along with an artery and vein

Question 20

What are the 2 pathways to the cerebral cortex?

Answer 20

Dorsal column

Anterolateral

Question 21

What do the 2 pathways to the cerebral cortex have in common?

Answer 21

3 neurons
Relay in thalamus
Cross over to opposite side of brain