Anatomy: Spinal Cord&dermatomes

Front 1

Dura Mater:

Back 1

"Hard Shell" outside Spinal Cord

Front 2

Arachnoid Mater:

Back 2

Underneath side of the "Hard Shell" side

Front 3

Subarachnoid Space:

Back 3

the space where spinal fluid flows through

Front 4

Pia Mater:

Back 4

"Skin" on spinal cord

Front 5

What are the Meningeal layers (3):

Back 5

1. Dura Mater
2. Arachnoid Mater
3. Pia Mater

**DAP**

Front 6

Grey Matter:

Back 6

"Butterfly" looking superiorly on spinal cord

**Nerve cell bodies**

Front 7

White Matter:

Back 7

Everything outside the "Butterfly"

**Axons are mylinated here

Front 8

Dorsal Horn:

Back 8

Pointed parts (Location-Posterior)

**Look for Ganglion--always mean posterior side

Front 9

Ventral Horn:

Back 9

More rounded parts (Location-Anterior)

Front 10

Lateral Horn:

Back 10

Hump/Bump located between the dorsal and ventral horn

Front 11

Dorsal Nerve Roots and Rootlets:

Back 11

Located Posterior

Front 12

Ventral Nerve Roots and Rootlets:

Back 12

Located Anterior

Front 13

Rootlets:

Back 13

Individually Seperated roots

Front 14

Roots:

Back 14

Points where the Rootlets come together to make one

Front 15

Spinal Nerve:

Back 15

Where Dorsal and Ventral roots come together

**Mixed (sensory&motor components): innervated by posterior rami

Front 16

Dorsal Root Ganglion:

Back 16

Thick Root before the Spinal Nerve

Located Posterior side

Front 17

Conus Medullaris:

Back 17

Cone at end of Spinal Cord (where it starts to taper)

Front 18

Cauda Edquina:

Back 18

"Horse Tail" fibers that are tapering off Conus Medullaris

Front 19

Denticulate Ligaments:

Back 19

attaches Pia Mater to Arachnoid Mater

**Shorter, located at anterior side

Front 20

Filum Terminale:

Back 20

Continuation of Pia Mater

Front 21

What does the Filum Terminal do?

Back 21

1. Anchors to sacrum
2. Keeps Spinal Cord secure

Front 22

Afferent?

Back 22

Awareness because you are using sensory. (Dorsal Side)

Front 23

Efferent?

Back 23

Motor (need energy)

Anterior side-goes away to peripheral

Front 24

2 things are continuation of the Pia Mater, what are they?

Back 24

1. Filum Terminale
2. Denticulate Ligament

Front 25

What is this picture of?

Label A-M

Back 25

Spinal Cord

A. Dorsal Root Ganglion G. Dorsal Horn
B. Spinal Nerve H. Ventral Horn
C. Ventral Rootlets I. Lateral Horn
D. Ventral Roots J. Grey Matter
E. Dorsal Roots K. White Matter
F. Dorsal Rootlet L. Dorsal Sulcus
M. Ventral Sulcus