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Dura mater
#1

Epidural space
Superficial layer of hard meninges

Subdural space
Deep layer of hard meninges

Arachnoid mater
#2 Superficial Layer

Subarachnoid space
Deep Layer

Pia mater
#3

Spinal gray matter
#4

Spinal white matter
#5

Central canal
#6

Anterior (ventral) root
#7 Skinny side

Posterior (dorsal) root
#8 Side with bump

Posterior root ganglion
#9 Bump on the root

Cauda equina

Sympathetic chain ganglion

Cervical plexus
#1

Phrenic nerve
#1a

Brachial plexus
#2

Radial nerve
#2a

Median nerve
#2b

Ulnar nerve
#2c

Intercostal nerve
#3

Lumbar plexus
#4

Femoral nerve
#4a

Sacral plexus
#5

Pudendal nerve
#5a

Sciatic nerve
#5b

Inferior gluteal nerve
green

Superior gluteal nerve
green
