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Human Anatomy, Larry M. Frolich, Ph.D. NERVOUS SYSTEM I CNS (Central Nervous System) Segmentation PNS (Peripheral Nervous System) Spinal Nerves Neuron.

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Presentation on theme: "Human Anatomy, Larry M. Frolich, Ph.D. NERVOUS SYSTEM I CNS (Central Nervous System) Segmentation PNS (Peripheral Nervous System) Spinal Nerves Neuron."— Presentation transcript:

1 Human Anatomy, Larry M. Frolich, Ph.D. 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 Human Anatomy, Larry M. Frolich, Ph.D. Central Nervous System (CNS) Brain and Spinal Cord Command Central PNS (Peripheral Nervous System) are nerves that go out to targets in body

3 Human Anatomy, Larry M. Frolich, Ph.D. 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 Human Anatomy, Larry M. Frolich, Ph.D. Counting Body Segments (vertebrae versus nerves) Why are there seven cervical vertebrae but eight cervical nerves?

5 Human Anatomy, Larry M. Frolich, Ph.D. Transverse View (x-section) vertebral body vertebral arch vertebral foramen spinal cord

6 Human Anatomy, Larry M. Frolich, Ph.D. Sagittal View vetebral body, arch intervertebral disc spinal cord spinal nerves (where?)

7 Human Anatomy, Larry M. Frolich, Ph.D. Zebra-Man Dermatomes Each is sensory area of one spinal nerve

8 Human Anatomy, Larry M. Frolich, Ph.D. Peripheral Nervous System (PNS) All nerves that leave the CNS Two Modalities: Somatic Visceral/Autonomic Sensory/Afferent (info. In) Motor/Efferent (commands out) Somatic Visceral/Autonomic --smooth mm. --heart --glands (hint: SAME) Parasympathetic Sympathetic

9 Human Anatomy, Larry M. Frolich, Ph.D. Somatic Motor Neuron (PNS) (CNS)

10 Human Anatomy, Larry M. Frolich, Ph.D. Sensory Neuron (PNS) (CNS)

11 Human Anatomy, Larry M. Frolich, Ph.D. Visceral (Autonomic) Motor Neuron (PNS) (CNS)

12 Human Anatomy, Larry M. Frolich, Ph.D. Segmental Spinal nerve (more in Nervous System II)

13 Human Anatomy, Larry M. Frolich, Ph.D. Autonomic Targets All have dual sympathetic and parasympathetic innervation (more in N.S.II)


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