1. Spinal Cord
& Nerves
Ch 13

2. The Spinal Cord

3. Peripheral Nervous System
cranial nerves- 12 pr
spinal nerves- 31 pr

4. The Spinal Cord white matter grey matter dorsal root pia mater
ventral root
pia mater
spinal nerves
arachnoid
dura mater

5. The Spinal Cord
vertebra
spinal cord
spinal nerve

6. Nerve Pathways into the Spinal Cord
sensory pathway
motor pathway

7. Neuron-To-Neuron Transmission
synapses
Interaction Between Neurons

8. Spinal Nerves

9. Spinal Nerves

10. Cervical Plexus

11. Brachial Plexus

12. Lumbar Plexus

13. Sacral Plexus

14. Functional Divisions of the Peripheral Nervous System
Afferent Division
Sensory (advances) neuron – goes toward CNS
Efferent Division
Motor (exits) neuron- leaves CNS
Somatic Nervous System
Autonomic Nervous System
A Typical Motor Neuron

15. Spinal Reflex Arc sensory neuron motor neuron stretch receptor
interneuron
stretch receptor
motor neuron
patellar ligament
Spinal Reflex Arc