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| Laboratory 13 : Tract Systems II |
| Olfactory Tract |
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Olfactory Tract
It is important to note that:
- Olfactory receptor cells replaced every 30 days. Info travels to diencephalon via olfactory tracts. First to prepiriform cortex (olfactory discrimination), then can take 3 paths: to telencephalon, to hippocampus, and to amygdala. Dominantly ipsilateral.
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Slide 103 : Telencephalon
- Input from receptor cells enters olfactory bulbs (olfactory tracts)
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Slide 90 : Telencephalon
- Sensory input via olfactory tract to prepiriform cortex (few cross at AC)
- Axons from MD go to cerebral cortex (coronal gyrus)
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Slide 70 : Diencephalon
- Collateralsfrom SA input (OB axons) goto amygdale (A) & to piriform cortex (PC)
- Impulses from mediodorsal nucleus (MD) pass rostrally toward cortex
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Slide 64 : Midbrain & Diencephalon
- Axons from PC synapse in MD
- MD axons go to orbitofrontal cortex (perception of smell)
- SA input continues to entorhinal cortex
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Slide 49 : Midbrain - Diencephalon
- Entorhinal cortex sends info to hippocampus (with amygdala = limbic pathway; affective component of olfaction)
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Copyright © 2006 - University of Pennsylvania School of Veterinary Medicine, All rights reserved.
Faculty: Dr. Richard Miselis, Dr. Peter Hand
Students: Natalie Fickel V'12, Ryan Donahue V'09, Cara Catanese V’08, Rebecca Wolf V'06, Keith Javic V'03, Ken Bixel V'99, Russel Howe-Smith V'97
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