Cranial Nerve 0 & 1

Cranial nerves (CN) are those nerves, which arise from the brainstem with the exception of CN I and II, the nuclei (site of origin) of which are located in the forebrain and thalamus respectively.  The forebrain consists of the cerebrum, thalamus, hypothalamus and the limbic system.  The CNs are not considered part of the central nervous system (CNS) but are part of the peripheral nervous system (PNS) with the exception of CN O, CN I (olfactory nerve) and CN II (optic nerve).  This article is devoted to CNs O and I.

cranial nerve 0 and 1