Term
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Definition
it is also called the rhinencephalon which is a complex system of neural circuits that form the sense of smell
composed of three subdivisions
- archicortex: hippocampus
- paleocortex: olfactory response
- neocortex: new cortex
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Term
Explain the stimulus that causes
are sense or detection of a smell |
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Definition
| receptors are stimulated by chemicals that generate odor |
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Term
| Receptors are located where? |
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Definition
In the olfactory membrane
located in the mucosa of the nostrils
they have a lifespan of 50 days |
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Term
| The olfactory system or tract divides into two areas what are they |
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Definition
- medial olfactory striae - a crossed pathway that uses the ant commissure
- lateral olfactory striae - UNcrossed pathway
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Term
There are 5 Key Areas of Synapse
name them |
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Definition
- olfactory tubercle
- piriform cortex
- anterior olfactory nucleus
- amygdala
- entrorhinal cortex
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Term
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Definition
| complete loss of smell - usually the result of a head injury that was caused a shearing force |
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Term
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Definition
reduction or partial loss of sense of smell (can happen as we age)
commonly seen in Parkinson's and Alzheimer's |
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Term
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Definition
seizure from temporal lobe by tumor causes hallucinations and smells
- uncus and amygdala |
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Term
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Definition
a watery dicharge from the nose
can be caused by trauma to the cribiform plate and leads to CSF leaking from the nose |
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Term
| The olfactory system has a central pathway describe its steps |
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Definition
- odor stimulates hair receptors & action potential is generated
- information is sent down CN I
- olfactory nerve travels through cribiform plate & enters olfactory bulb
- olfactory bulb lies on ventrorostral aspect of ipsilateral forebrain
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