nervous system - PowerPoint PPT Presentation

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nervous system

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anatomy and physiology of nervous system – PowerPoint PPT presentation

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Title: nervous system


1
NERVOUS SYSTEM I
  • CNS (Central Nervous System)
  • Segmentation
  • PNS (Peripheral Nervous System)
  • Spinal Nerves
  • Neuron Types
  • Autonomic Nervous System
  • (how many nervous systems are there anyways?)

2
Central Nervous System (CNS)
  • Brain and Spinal Cord
  • Command Central
  • PNS (Peripheral Nervous System) are nerves that
    go out to targets in body

3
Coronal Section Cartoon
  • Brain
  • Cranial Cavity of Skull
  • Spinal Cord
  • Vertebral Arches
  • Cranial Nerves I-XII (off brain)
  • Spinal Nerves
  • C--8 prs (L,R)
  • T--12 prs
  • L--5 prs
  • S--5 prs

4
Counting Body Segments(vertebrae versus nerves)
  • Why are there seven cervical vertebrae but eight
    cervical nerves?

5
Transverse View (x-section)
  • vertebral body
  • vertebral arch
  • vertebral foramen
  • spinal cord

6
Sagittal View
  • vetebral body, arch
  • intervertebral disc
  • spinal cord
  • spinal nerves (where?)

7
Zebra-Man
  • Dermatomes
  • Each is sensory area of one spinal nerve

8
Peripheral Nervous System (PNS)
  • All nerves that leave the CNS
  • Two Modalities

Somatic Visceral/Autonomic
Sensory/Afferent (info. In) Motor/Efferent (comma
nds out)
(hint SAME)
Somatic Visceral/Autonomic --smooth
mm. --heart --glands
Parasympathetic Sympathetic
9
Somatic Motor Neuron
(PNS)
(CNS)
10
Sensory Neuron
(PNS)
(CNS)
11
Visceral (Autonomic) Motor Neuron
(PNS)
(CNS)
12
Segmental Spinal nerve(more in Nervous System II)
13
Autonomic Targets
  • All have dual sympathetic and parasympathetic
    innervation
  • (more in N.S.II)
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