GENERAL HISTOLOGY

Detailed explanation-1: -The olfactory nerve, also known as the first cranial nerve, cranial nerve I, or simply CN I, is a cranial nerve that contains sensory nerve fibers relating to the sense of smell. The afferent nerve fibers of the olfactory receptor neurons transmit nerve impulses about odors to the central nervous system (olfaction).

Detailed explanation-2: -Your olfactory nerve is the first cranial nerve (CN I). It’s also part of your autonomic nervous system, which regulates body functions. This nerve enables your sense of smell. Cranial nerve 1 is the shortest sensory nerve in your body.

Detailed explanation-3: -There are two olfactory bulbs on the bottom side of the brain, one above each nasal cavity. The olfactory bulbs receive information about smells from the nose and send it to the brain by way of the olfactory tracts.

Detailed explanation-4: -From the olfactory bulb, each olfactory tract runs posteriorly along the olfactory sulcus and ends in the olfactory trigone. The olfactory trigone is a triangular widening of the terminal olfactory tract located superior to the anterior clinoid process and directly rostral to the anterior perforated substance.

Detailed explanation-5: -Your ability to smell comes from specialized sensory cells, called olfactory sensory neurons, which are found in a small patch of tissue high inside the nose. These cells connect directly to the brain. Each olfactory neuron has one odor receptor.