LS2.Lecture7.Nervous system2

LS2.Lecture7.Nervous system2 - *focus on material that...

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Unformatted text preview: ***focus on material that explains in more detail topics covered in lecture*** Today: We complete our discussion of the basic structure of the nervous system, and discuss the physiology of neurons and transmission of information between nerve cells. Next time: Nerve to muscle Office Hours: Friday 2-3 (after class) and by appointment; email [email protected] LS2 Nervous System, part 2 Prof. George V. Lauder Assigned Reading: Custom text, pp. 219-273 (green page #s) Lecture outline • Review of material in last lecture: basic organization of the nervous system • Physiology of the nervous system: electrical potentials • Axon ion gradients: channels and pumps • Action potentials (axon conduction) • Graded potentials (cell-cell communication at the synapse) • Synapse structure and function • Neural integration From last lecture … Anterior view of one vertebra and the nearby section of the spinal cord Spinal nerve structure (simple version) “gray matter” = nerve cell bodies “white matter” = nerve cell axons Spinal nerve structure (simple version) interneuron = M o t o r n e u r o n Preganglionic neuron Postganglionic neuron Contrast autonomic and somatic components of the nervous system Sympathetic pregang. = red Sympathetic postgang. = yellow Parasympathetic pregang. = blue Parasympathetic postgang. = green Schematic diagram of the mammalian autonomic nervous system Custom text, page 263, has a similar diagram. Autonomic nervous system – another diagram version Parasympathetic division Sympathetic division Action on target organs: Action on target organs: Location of preganglionic neurons: brainstem and sacral segments of spinal cord Neurotransmitter released by preganglionic neurons: acetylcholine Location of postganglionic neurons: in ganglia close to or within target organs Neurotransmitter released by...
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  • Fall '10
  • AndrewA.Biewener,PeterT.Ellison,andDanielE.Lieberman
  • Action Potentials, preganglionic neurons, postganglionic neurons

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LS2.Lecture7.Nervous system2 - *focus on material that...

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