Spinal Cord

Conus medullaris

Cone end of spinal cord at L1 and L2

Cauda Equina

Nerve branches hanging from the conus medullaris

Filem terminale

Anchors spinal cord

C1-C7

Comes out above named vertebrae

C8

Comes out from below

T1-S5

Spinal nerves come out from beneath vertebrae

Gray matter

Horns

White matter

Columns

Central canal

Contains CSF

Posterior median sulcus

Shallow groove

Anterior median sulcus

Deep groove

Gray matter connected via

Gray commissary

Dorsal nerves are

Sensory

Ventral roots are

Motor

Spinal nerves are

Mixed

Subarachnoid space has

CSF

Posterior root has what kind of nuclei

Somatic and visceral

Anterior root has what kind of nuclei

Somatic and visceral

Rami communicantus

Goes to sympathetic chain ganglion

Posterior ramus goes to what

Back of body

Anterior ramus goes to what

Forms plexuses

Cervical plexus

C1-C5

• lesser occipital nerve

• Greater auricular nerve

• Transverse cervical nerve

• Supraclavicular nerve

• PHRENIC nerve

Brachial plexus

C5-T1

• axillary

• Musculocutaneous nerve

• Thoracic nerves

• Radial nerve

• Ulnar nerve

• Median nerve

Lumbar plexus

T12-L4

• illiohypogastric nerves

• Genitofemoral

• Femoral

• Oburator nerve

Sacral plexus

L4-S4

• superior gluteal

• Inferior gluteal

• Posterior femoral

• Pudendal

• Sciatic

Musculocutaneous muscle

Biceps brachii

How many cervical nerves?

8

How many thoracic nerves?

12

How many lumbar nerves?

5

How many sacral nerves?

5