Anatomy study note · Head and neck

Olfactory nerve

The first cranial nerve (sensory): the nerve of smell.

Key points

• CN I, sensory (smell).
• Upper nasal mucosa → cribriform plate → olfactory bulb → tract → cortex.
• Cribriform plate fracture → CSF rhinorrhoea.
• Olfactory epithelium: nasal (olfactory) placode.
• Olfactory cells = bipolar neurons with non-motile cilia.
• Bowman glands: serous secretion.

The full note in the atlas also covers

Course · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1499, 1661–1663, 1683
• Inderbir Singh’s Human Embryology, ch. 11, PDF pp. 146, 155–156
• BRS Cell Biology & Histology, 7th ed., ch. 15, PDF p. 270

More from the head and neck

• Omohyoid
• Ophthalmic artery
• Ophthalmic nerve
• Ophthalmic veins
• Optic nerve
• Orbicularis oculi
• Orbicularis oris
• Palate
• Palatine tonsil
• Palatopharyngeus
• Parathyroid glands
• Parietal bone

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