Define gyrus. gyrus synonyms, gyrus pronunciation, gyrus translation, English dictionary definition of gyrus. n. pl. gyÂ·ri A rounded ridge, as on the surfaces of the cerebral hemispheres. n , pl gyri another name for convolution3 n., pl. gyâ¢ri a convoluted fold of...
olfactory nerve. n. Any of numerous olfactory filaments in the olfactory portion of the nasal mucosa that enter the olfactory bulb, where they terminate in synaptic contact with mitral cells, tufted cells, and granule cells. Also called first cranial nerve.he fibers pass into the skull and form synapses with the dendrites of the mitral cells. The area in which the olfactory nerves arise is situated in the most superior part of the mucous membrane that covers the superior nasal concha.
Review of Cranial Nerves. 1  The bony opening in the cranial cavity through which it exits. 2  Its general course and the branches that have been discussed in lecture. 3  Any additional openings in bone that the nerve or its branches pass through. Whether it is somatic or visceral, motor or sensory, general or special, and if it carries pre-or postganglionic parasympathetic fibers. 2  Several of the cranial nerves are quite simple in this regard.