1. The Nervous System
Chapter 11

2. Two types of cells
neurons
neuroglia (glial cells):

3. Neuron anatomy
cell body

4. Neuron anatomy
dendrites

5. Neuron anatomy
axon

6. Neuroglia of the PNS
Schwann cells

7. Neuroglia of CNS
oligodendrocytes

8. Action Potentials (nerve impulses)

9. Action potentials
depend on resting membrane potential

10. Action potentials

11. How does this happen? (Big picture)

13. Conduction of AP
continuous
saltatory

14. At axon terminal bud, stimulus is transferred to another cell

15. Synapses: elaborate cell junctions
made up of:

17. Events at a synapse

18. Pathology: Multiple sclerosis (MS)

19. 2 divisions of nervous system
1. central nervous system (CNS)
2. peripheral nervous system (PNS)

20. Divisions of PNS sensory: motor: somatic: autonomic: sympathetic:
parasympathetic:

21. Nervous system another way
CNS
PNS
sensory
motor
somatic
autonomic
sympathetic
parasympathetic

22. CNS: our brain
three anatomical & functional divisions
Forebrain

23. Hindbrain (3 parts)
medulla oblongata
pons
cerebellum

24. Midbrain (1 part)
midbrain

25. Forebrain (3 parts) cerebrum corpus callosum thalamus corpus callosum

27. Lobes of the brain
frontal
parietal
occipital
temporal

28. CNS: spinal cord

29. Protection of CNS
axial skeleton
meninges: membranous coverings

31. Protection of CNS
Cerebral spinal fluid (CSF)
Location of CSF

32. CSF pathology
hydrocephalus

33. Remember the divisions of PNS?
somatic:

34. Remember the divisions of PNS?
autonomic:

35. Autonomic nervous system
most organs have dual innervation