<anatomy> The optic nerve. The nerve carrying impulses for the sense of sight.

Projection from the vertebrate retina to the midbrain. Embryologically, a CNS tract rather than a peripheral nerve. Popular experimental preparation for studies of regeneration of retino tectal projections in lower vertebrates and also for studies of glial cell lineage in CNS.

Synonyms: cranial nerve II.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)

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