11/25/2025
Anatomy Trivia, Nerve Edition: PT 2️⃣
Do you know what cranial nerve is responsible for smell? 👃
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The olfactory nerve (Cranial Nerve I) is the sensory nerve responsible for the sense of smell. It originates in the nasal cavity’s olfactory epithelium, travels through the cribriform plate of the ethmoid bone, and synapses in the olfactory bulb, where it relays information to other parts of the brain via the olfactory tract.
💥Damage to this nerve can cause a complete or partial loss of smell.
👃 Anatomy and function
👉Origin: The nerve originates from specialized olfactory receptor neurons in the olfactory epithelium, located in the roof of the nasal cavity.
👉Structure: The axons of these neurons form bundles called fila olfactoria that collectively make up the olfactory nerve.
👉Path: These nerve fibers pass through small holes in the cribriform plate of the ethmoid bone to reach the olfactory bulb, which sits on the underside of the brain’s frontal lobe.
👉Transmission: From the olfactory bulb, the signal is sent to the olfactory cortex, allowing you to perceive smells