Anatomy and Cell Biology 3319 Lecture Notes - Lecture 21: Olfactory Bulb, Olfactory Nerve, Lisa Lopes
7 Nov 2016
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Document Summary
Olfactory nerve i most rostral part of brain. Special sensory: afferent information for sense of smell. Odours enters the nose and is detected by the olfactory nerve. Olfactory nerves bulb tract olfactory cortex. To the right you have a nasal cavity (red/orange) at top part of nasal cavity you have specialized nasal epithelium connected to specialized nerve endings (olfactory nerve endings) Nerve endings unite together to form filaments filaments path through holes under yellow part of bone called foramina in cribriform then go to olfactory bulb tract. Any part of yellow carries smell sensation lesion can happen anywhere in tract nose, or bulb, or tract can get destroyed commonly in trauma to ethmoid bone or in cases of meningitis. On temporal side 90 degree, nasal degree 60 degree, upwards it is 50 degrees, downwards. Retina optic nerve optic chiasm optic tract thalamus visual cortex it is 70 degrees.
