N2100 lecture 14.pptx - Cranial Nerves Steven McLoon...

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Cranial Nerves Steven McLoon Department of Neuroscience University of Minnesota 1
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Course News Change in Lab Sequence Week of Oct 2 – Lab 5 Week of Oct 9 – Lab 4 2
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Sensory Systems: Somatosensory Visceral sensory Special sensory Vision Auditory Vestibular Gustatory (taste) Olfactory (smell) Sensory and Motor Systems Motor Systems: Somatomotor Branchial motor Autonomic (visceral) motor Parasympathetic Sympathetic general sensory general motor 3
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General Sensory and General Motor Systems 4
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The autonomic motor system controls smooth muscle, the heart, glands, blood vessels, etc. 5 Autonomic Motor System
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6 It is a two neuron output system, a preganglionic neuron in the brainstem or spinal cord and a ganglion neuron in a ganglion. Autonomic Motor System
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Autonomic Motor System 7 The autonomic system has two subdivisions: Sympathetic system Preganglionic neurons are in the thoracic spinal cord. Ganglion neurons are in sympathetic ganglia on both sides of the vertebral column. Preganglionic axons are short and postganglionic axons are long. Parasympathetic system Preganglionic neurons are in the brain stem and sacral spinal cord. Ganglion neurons are in parasympathetic ganglia near their targets. Preganglionic axons are long and postganglionic axons are short.
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The circuitry of each is unique and does not lend itself to a general diagram. All use cranial nerves (and not spinal nerves) to relay information into the brain.
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  • Fall '17
  • Steven McLoon

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