Bio 223 Lab 8

Gray Matter

Anterior Gray Horns

Lateral Gray Horns

Posterior Gray Horns

White Matter

Anterior White Columns

Posterior White Columns

Lateral White Columns

Gray Commissure

Central Canal

Dorsal(Posterior) Root (Of spinal cord)

Ventral (anterior) root (of spinal cord)

Dorsal Root Ganglia

Spinal nerve

(Where the nerves connect)

Sympathetic chain

(More than one ___________ ganglion)

Sympathetic ganglion

Conus Medullaris

Filum Terminale

Cauda Equina

Ventral Ramus

Dorsal Ramus

Myelin sheath

Epineurium

Perineurium

Endoneurium

Axillary

1

Radial

2

Ulnar

4

Medial

5

Musculocutaneous

3

Intercostals

6

Obturator

7

Femoral

8

Common fibular

11

Sciatic

9

Tibial

10

Somatic -extension at knee/leg

Patellar reflex

Somatic-plantar flexion at ankle, plantar flexion of foot

Achillies reflex

Autonomic- In children:extension/dorsiflexion of big toe. In adults: nothing of plantar flexion/curling of toes

Papillary reflex

Dorsal root

Ventral root

White communicating ramus

Pink

Gray communicating ramus

Purple

dorsal root ganglion

Bulge