1. Spinal Cord!

2. Spinal cord connects the brain to the PNS

3. Spinal cord is surrounded by
bone for protection

4. How big is the actual cord?
Very small!!! Look for the H!!
H is the gray matter

5. through a canal within the backbone
The spinal cord exits the skull through a hole known as the foramen magnum.
Extends downward
through a canal within the backbone

6. Spinal Cord 1. White matter is myelinated (W/M)
Contains 2 types of nerve tissue---gray and white matter
1. White matter is myelinated (W/M)
made mostly of interneurons
2. Gray matter is central and
unmyelinated
made of cell bodies of motor neurons

7. Spinal Cord M
U/M
White=
Myelinated

8. The spinal cord is surrounded by 3 meninges (membranes)
White
matter
Grey matter
Pia mater
Ventral root
Arachnoid membrane
Dorsal root
Dura mater
The spinal cord is
surrounded by
3 meninges
(membranes)

9. Dorsal
Ventral

10. Dorsal Root
contains
Sensory
neurons

11. Try labeling this diagram!!
Answers on the next slide!

12. Answers!! Sensory Neuron Effector Spinal cord Receptor Central Canal
InterNeuron
Gray
Matter
White matter
Motor Nerve
Answers!!

14. Different parts of the spinal cord control different parts of the body
This info is used a
lot by chiropractors
& physiotherapists!

15. Try labeling this diagram!!