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Human Anatomy, Larry M. Frolich, Ph.D. Nervous System II Spinal Cord and Spinal Nerves Meninges and Cerebro-spinal fluid (CFS) Autonomic Function.

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Presentation on theme: "Human Anatomy, Larry M. Frolich, Ph.D. Nervous System II Spinal Cord and Spinal Nerves Meninges and Cerebro-spinal fluid (CFS) Autonomic Function."— Presentation transcript:

1 Human Anatomy, Larry M. Frolich, Ph.D. Nervous System II Spinal Cord and Spinal Nerves Meninges and Cerebro-spinal fluid (CFS) Autonomic Function

2 Human Anatomy, Larry M. Frolich, Ph.D. Spinal Cord Cross Section

3 Human Anatomy, Larry M. Frolich, Ph.D. White matter (myelinated tracts) Gray matter (cell bodies) Ventral horn--motor neurons Dorsal horn--interneurons for sensory Dorsal Root--sensory Ventral Root--motor Spinal Nerve Dorsal Ramus (to dorsal mm., skin) Ventral Ramus (to ventral limbs mm., skin) Dorsal Root Ganglion Sensory Neuron Somatic Motor Neuron Spinal Cord Cross Section (drawing on handout--showing reflex arc)

4 Human Anatomy, Larry M. Frolich, Ph.D. Spinal nerve (cross section through thorax--on handout) Dorsal Root Ganglion Ventral root Spinal Nerve Dorsal Ramus Ventral Ramus (Where would you find the ventral ramus relative to the ribs) (Look for lateral cutaneous nerves on your cat!!)

5 Human Anatomy, Larry M. Frolich, Ph.D. Spinal Cord showing meninges

6 Human Anatomy, Larry M. Frolich, Ph.D. What are meninges? Connective tissues around spinal cord For protection For nutrition Three layers Pia mater Arachnoid mater Dura mater

7 Human Anatomy, Larry M. Frolich, Ph.D. Pia mater(deep) delicate highly vascular adheres to brain/sp cd tissue Subarachnoid space (where CSF flows) Arachnoid mater (middle) impermeable layer = barrier raised off pia mater by rootlets Spinal Dura Mater single dural sheath

8 Human Anatomy, Larry M. Frolich, Ph.D. Sympathetic and Parasympathetic Why double innervation? Paraympathetic keeps normal rhythms, functioning--all calm Sympathetic is fight or flight fear response

9 Human Anatomy, Larry M. Frolich, Ph.D. ParasympatheticSympathetic LocationCranial, sacral Thoracic, Lumbar GangliaIn target organsClose to spinal cord Neuro- Transmitter Acetylcholine (calmer) Norepinephrine (adrenalin!!) EffectTable 15.2For details How are Para/Sympa different?

10 Human Anatomy, Larry M. Frolich, Ph.D.


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