cranial nerve defined in 1951 yearcranial nerve - cranial nerve;
cranial nerve - Peripheral nerve emerging from brain of vertebrate, i.e. originating within the skull; as distinct from spinal nerve, which emerges from spinal cord. Dorsal and ventral roots (See also: Nerve Root) of several segments exist amongst these nerves, but (unlike those of spinal cord) remain separate. Each root is numbered and named as a separate nerve, but the numbering bears little relation to segmentation of head. Olfactory and optic nerves are not equivalent to either dorsal or ventral roots. There are ten cranial nerves on each side in living anamniotes, eleven or twelve in amniotes and fossil amphibians. Include nerves supplying eyes, ears, nose, jaw muscles, skin of face, etc. See also: Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Auditory, Glossopharyn-geal, Vagus, Accessory, Hypoglossal nerves.
near cranial nerve in Knolik
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