Nervous System

1
Nervous System

• General functions
• Sensory receptors
• Integration stores information as memory
• Response motor effectors

2
(No Transcript)
3
Classification

• Central Nervous System brain spinal cord
• Peripheral Nervous System
• Afferent
• Somatic
• Visceral
• Efferent
• Somatic
• Visceral Autonomic Nervous System

4
(No Transcript)
5
(No Transcript)
6
Classification

• Autonomic Nervous System
• Sympathetic Nervous System for fight or flight
  response
• Parasympathetic Nervous System for rest and
  relaxation response

7
Key Points

• Classify the Autonomic Nervous System
• CNS or PNS
• Afferent or Efferent
• Sensory or Motor
• Somatic or Visceral

8
Neuron Nerve Cell

• Cell body
• Ganglion
• Nucleus
• Cytoplasmic processes
• Axon Fiber
• Fiber tracts in CNS
• Nerve in PNS
• Sensory, Motor, Mixed
• Dendrite

9
(No Transcript)
10
Synapse

• Junction between adjacent neurons
• Telodendria ends of axon
• Neurotransmitters chemicals bridging the synapse

11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
Neuroglia Nerve glue

• Supportive cells to neurons
• Ependymal cells line the neurocoel and provide
  nutrients

15
(No Transcript)
16
(No Transcript)
17
Neuroglial Cells

• Oligodendroglia produce myelin in CNS which is
  white and speeds up nerve impulse transmission

18
(No Transcript)
19
Neuroglial Cells

• Astrocytes Maintain blood brain barrier

20
(No Transcript)
21
Key Points

• Parkinsons Disease in humans is known to be
  caused by a decrease in dopamine
  (neurotransmitter) in the brain. Why not just
  inject patients with IV dopamine?

22
Neuroglial Cells

• Microglia function as phagocytes

23
Key Points

• What is a phagocyte?

24
(No Transcript)
25
Neuroglial Cells

• Schwann Cells Produce myelin in PNS

26
(No Transcript)
27
Key Points

• What is meant by white matter?
• What is meant by gray matter?

28
Development of Nervous System

• Neurulation
• Neural tube
• Germinal layer medial, with mitosis
• Mantle layer gray, cell bodies of neurons
• Marginal layer white cytoplasmic processes
  without nuclei

29
(No Transcript)
30
Development of Nervous System

• Neuroblasts form neurons
• Spongioblasts form neuroglia
• Alar plate is dorsal gray matter (nuclei)
• Basal plate is ventral gray matter

31
(No Transcript)