Lab 7

Question 1

What is the histology of the spinal cord?

Answer 1

Grey matter-stained “butterfly”, white matter, ganglion “large bulge”, cell bodies “circles within ganglion”, nerve “large bundles”, and axons “within nerve”.

Question 2

Where does the spinal cord end and what extends bellow it?

Answer 2

End: conus medullaris (between L1&2)
Below: cauda equina

Question 3

What can you see in the spinal cord?

Answer 3

Central canal
Grey matter: ventral horn, lateral horn, dorsal horn
White matter: ventral median fissure, dorsal median sulcus, ventral column (funiculus, tract), dorsal column, lateral column

Question 4

What are the spinal nerve structures?

Answer 4

Dorsal root, dorsal root ganglion, ventral root, dorsal ramus, ventral ramus, rami communicantes

Question 5

What are the meninges and spaces of the spinal cord?

Answer 5

Dura mater, arachnoid mater, pia mater, subarachnoid space, epidural space,

Question 6

What are the spinal plexi and what is one main nerve that comes from each?

Answer 6

Cervical plexus-phrenic nerve
*Thoracic nerves T2-T12 do not have plexi”
Brachial plexus-median nerve
Lumbar plexus-femoral nerve
Sacral plexus-sciatic nerve