67092 netter42
Olfactory System: Pathway
NEUROPHYSIOLOGY
I} Efferent fibers
Granule celi (cxcited by and inhibiting to mitral and tufted cells)
Fibors from contralateral olfactory bulb
Fibors to contralatoral olfactory bulb
Anterior commissure
Medial olfactory stria
Olfactory trigone and olfactory tuberde
Antorior porloratod substance
Latcral olfactory stria
- Mitral celi
- Recurrent process
Olfactory epithelium Olfactory nerves
Olfactory bulb Cribriform piąte of ethmoid bonę
Entorhinal arca
olfactory' tract nucleus
Piriform lobe
Uncus
FiGURt 2.41 Olfactory Pathway
Olfactory stimuli are delccted by the nervc fibers of the olfactory epithelium and conveyed to the olfactory bulb (detailed local cir-cuitry shown in upper lott panel). Integrated signals pass along the olfactory tract and centrally diverge to pass to the anterior commis-sure (some eflerenl projcctions coursc to the contralatoral olfactory bulb. blue lines) or terminate in the ipsilateral olfactory trigone (olfactory tuberde). Axons thcn project to the primary olfactory cortex (piriform cortexj, entorhinal cortex, and amygdala.
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