Anatomy and Cell Biology 3319 Lecture Notes - Lecture 4: Oculomotor Nerve, Parotid Gland, Cranial Nerves
23 Jun 2016
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Central and peripheral are always in communication with each other. Typically in somatic ns, there is 1 neuron to spinal cord, but autonomic typically has 2 neurons. Since it"s only 1 neuron, its speed is pretty fast; autonomic has to go through that first ganglia. Somatic on the top (1 neuron); autonomic is split into sympathetic and parasympathetic (2 neurons) Good example of when they work together is orthostatic hypotension, (i. e. when you suddenly. Note that in eyes, stimulation of diff muscles; but in salivary etc. glands it"s stimulation and inhibition of the same thing. Right img: purple is showing parasympathetic; sympathetic in green. Origin: top of brain stem, and bottom of spinal cord. Ganglia that lie close to organ have long preganglion and short postganglionic fibre as it"s already at the organ and doesn"t need to extend its axon any further.
