Exam 1: olfactory nerve Flashcards
CN 2
Olfactory
Olfactory neurons found in ____ of ____, which is covered by thin layer of mucus
Olfactory epithelium
Superior part of nasal cavity
Primary sensory neuron
Olfactory neurons
Olfactory neurons are
Bipolar
Olfactory neurons are supported by
Supporting cells
Olfactory ___ are receptors
Hairs
___ olfactory nerves relay to olfactory bulb
10-20
Axons of olfactory neurons are unmyelinated, but covered by ___
Schwann cells
Olfactory neurons pass through ____ and synapse on ____ in olfactory bulb
Cribriform plate/ethmoid
Mitral cells
Olfactory neurons synapse with mitral cells at
Synaptic glomeruli
Secondary sensory neurons
Mitral cells
Mitral cell located in
Olfactory bulb
Mitral cells relay info via
Olfactory tract
At the ___, olfactory tract fibers split into medial and lateral olfactory striae
Anterior perforated substance
Medial stria cross midline at ____ and travel to opposite olfactory bulb
Anterior commissure
Lateral stria carry info to
Primary olfactory cortex
Primary olfactory cortex composed of
Periamygdaloid area
Prepiriform area
Uncus (BM 34)
Secondary olfactory cortex composed of
Entorhinal area (BM 28)
Number of neurons to get form receptor to cortex
2
Structure not synapsed in
Thalamus
Terminal nerve
Receptors on nasal septum
Autonomic
Vomeronasal nerve
Important for tracking prey
Poor in humans
First sense to deteriorate in Alzheimer’s
Olfaction
Skull fractures can cause ___ to leak out of the cribriform plate
CSF
