释义 |
optic nerve CN II op·tic nerve [CN II] [TA] although classified as a cranial nerve, the optic nerve is actually an extension of the forebrain; it conveys afferent fibers from the ganglion cells of the retina, and it passes out of the orbit through the optic canal to the chiasm, where a portion of the fibers cross to the opposite side in the optic chiasm; crossed and uncrossed fibers pass through the optic tract to the geniculate bodies, superior colliculus, and pretectum. Synonym(s): nervus opticus [CN II] [TA], second cranial nerve [CN II]op·tic nerve [CN II] (op'tik nĕrv) [TA] Although classified as a cranial nerve, it is actually an extension of the forebrain; it conveys afferent fibers from the ganglion cells of the retina; it passes out of the orbit through the optic canal to the chiasm, where part of the fibers cross to the opposite side and pass through the optic tract to the geniculate bodies, superior colliculus, and the pretectum. Synonym(s): nervus opticus [CN II] [TA] , second cranial nerve [CN II]. op·tic nerve [CN II] (op'tik nĕrv) [TA] Although classified as a cranial nerve, it is actually an extension of the forebrain; conveys afferent fibers from the ganglion cells of the retina and passes out of orbit through optic canal to the chiasm. Synonym(s): nervus opticus [CN II], second cranial nerve [CN II]. |