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It contains parasympathetic pre-ganglionic neuron cell bodies that synapse in the ciliary ganglion. [ 3 ] [ 2 ] It contributes the autonomic, parasympathetic component to the oculomotor nerve (CN III), [ 4 ] ultimately providing innervation to the iris sphincter muscle and ciliary muscle to mediate the pupillary light reflex and accommodation ...
The actual image is great, and I love both public domain and SVG. Zakolantern 22:51, 13 July 2007 (UTC) Can someone please teach me (my talk page or here) how to link to an image page without the image appearing? (I want the link I used to go to Image:Eye-diagram_no_circles_border.svg, without the image appearing. I failed. Thank you.
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The pseudounipolar neuron's axon then splits into two branches. Sensory neurons with cell bodies in the dorsal root ganglia of the vertebrate spinal cord are pseudo-unipolar: one branch projects to the periphery (to sensory receptors in the skin, joints, and muscle), the other to the spinal cord.
Skeletal muscle cells are the individual contractile cells within a muscle and are more usually known as muscle fibers because of their longer threadlike appearance. [10] Broadly there are two types of muscle fiber performing in muscle contraction , either as slow twitch ( type I ) or fast twitch ( type II ).
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The part of the axon where it emerges from the soma is called the axon hillock. Besides being an anatomical structure, the axon hillock also has the greatest density of voltage-dependent sodium channels. This makes it the most easily excited part of the neuron and the spike initiation zone for the axon.