3) Nervous System

nucleus

nucleus

nucleolus

nucleolus

nuclear envelope

nissl bodies

nissl bodies

soma (cell body)

soma (cell body)

soma (cell body)

axon hillock

axon hillock

axon

axon

dendrites

dendrites

myelin sheath

schwann cell

node of ranvier

axon terminal

synaptic end bulbs

telodendrion

spinous process

spinous process

white matter

grey matter

5

dorsal horn

6

lateral horn

what vertebrae have lateral horns?

T1-L2

7

ventral horn

how can you tell if a vertebra is cervical?

look for vertebral artery

9

central canal

10

posterior median sulcus

14

anterior median fissure

1

posterior (dorsal) column

2

lateral column

3

anterior (ventral) column

24

dorsal root ganglion

23

dorsal root

25

ventral root

what’s the difference between columns and horns?

columns: white matter
horns: grey matter

conus medullaris

conus medullaris

where does conus medullaris end in adults?

L1-L2

cauda equina

cauda equina

filum terminale

what is filum terminale?

ligament (fibrous connective tissue) that anchors spinal cord to coccyx

what is the filum terminale a continuation of?

pia mater

dorsal root

ventral root

dorsal root ganglia

conus medullaris

dura mater

arachnoid mater

dorsal root

cauda equina

epidural space

dura mater

arachnoid mater

subarachnoid space

pia mater

pia mater

subarachnoid space

arachnoid mater

subdural space

dura mater

28

mixed spinal nerve