1. Divisions of the Nervous System Central (inside skull & spine) Brain
Spinal Cord
Peripheral (outside)
Nerves
Spinal cord
lesion

2. Figure 3.3 The Nervous System

3. Figure 3.24 Spinal Column, Ventral View

4. Vertebra of Spinal column
Here is where spinal cord lives.
Nerves leave spinal cord from between vertebrae (thus if discus moves, or pinch) there is pain (similar to facia paralysis following inflamation of facial nerve, or oppression of optic nerve by pituitary tumor).

5. Figure 3.26: Spinal Cord Cross Section

6. Figure 3.25 The Spinal Cord

7. Sensory neuron Group activity Interneuron motor neuron Ouch!
That hurts, dude!
Group activity
Spinal cord
lesion
Sensory
neuron
Interneuron
Cells of the Nervous System. There are three general types of neurons:
Sensory neuron:
A neuron that detects changes in the external or internal environment and sends information about these changes to the central nervous system.
Motor neuron:
A neuron located within the central nervous system that controls the contraction of a muscle or the secretion of a gland.
Interneuron:
A neuron located entirely within the central nervous system.
polio
motor
neuron
Would sensation be abolished by:
a spinal cord lesion?
polio?
Would the reflex be abolished by:
a spinal cord lesion?
polio?

8. The Peripheral Nervous System
Somatic Nervous System
Spinal Nerves
Cranial Nerves
Receives sensory information
controlling voluntary movement
Autonomic Nervous System
Sympathetic
Parasympathetic

9. Figure 3.28 The Autonomic Nervous System