1. Nervous System
Anatomy

2. Divisions of Nervous System
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
Brain
Spinal Cord
Nerves
Cranial Nerves
Optic sensation / eye movement
Face / mouth sensation
Hearing / balance
Throat / salivary glands
Thoracic nerve
ANS (Autonomic Nervous System)

3. ANS – visceral motor neurons
Sympathetic
Fight or Flight
Parasympathetic
Normal state (relaxed)

5. Brain

6. Brain Stem
Function of heart and lungs
Visual / auditory reflexes

7. Cerebellum
Movement
Coordination
Balance

8. Hypothalamus
Integration

9. Thalamus
Sensations

10. Cerebrum
Cortex/Lobes
Additional Functions

11. Other Parts Meninges – protective layer
CSF (Cerebrospinal Fluid) – protection, buoyancy, waste elim., hormone transport
BBB (Blood Brain Barrier) – protects, homeostasis (semi permeable)

12. Spinal Cord

13. Function: Conduct Sensory Impulse Conduct Motor Impulse Reflexes
Signal/Motor response (arc)
Spinal or Stretch

14. Afferent Nerve
Nerve runs to the brain and spinal cord from body.

15. Efferent Nerve Nerve runs from brain and spinal cord to body.
Motor neuron

16. Nerve Cells

17. Neurons
Develop in embryo and grow like tentacles

18. Parts of a Neuron Cell body – nucleus and organelles
Dendrites – extensions that carries impulse toward cell
Axons – long extension carries impulse away from cell
Myelin Sheath (fatty insulation) – avoid “short circuit”

19. Nerve Impulse Movement of ions across membrane
Anesthesia – blocks ions (no nerve impulse)

20. Synapse
Junction between axon and dendrites

21. Neurotransmitter Chemical “go between”
Acetylcholine – muscle contraction
Dopamine – motor control
Serotonin – sensory / emotion

22. Any questions?