The Olfactory Nerve (CN I) - Pathway - Anosmia - TeachMeAnatomy

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The olfactory nerve (CN I) is the first and shortest cranial nerve. It is a special visceral afferent nerve, which transmits information relating to smell.

Embryologicallly, the olfactory nerve is derived from the olfactory placode (a thickening of the ectoderm layer), which also give rise to the glial cells which support the nerve.

In this article, we shall look at the anatomy of the olfactory nerve – its structure, anatomical course and clinical relevance.

By TeachMeSeries Ltd (2026) Lateral view of the nasal septum highlighting the olfactory bulb and cribriform plate relationship.

Fig 1Innervation of the nasal cavity. The olfactory nerve is responsible for the sense of smell. The nasociliary and nasopalatine nerves provide general sensation.

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