Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Cranial nerve I
Medically reviewed by Min Clinic Staff | Updated: January 2026
Cranial nerve I: The first nerve to emerge from or enter the skull (the cranium). (There are twelve cranial nerves.) The first cranial nerve is the olfactory nerve which permits the sense of smell. See: Olfactory nerve.