Nucleus · one in each half of the brain
Superficial (cortical) amygdala
Also called Cortical nuclei, Cortical amygdala, Superficial cortex-like group
The amygdala's smell-and-social corner, where scents meet feelings.
The superficial nuclei sit on the surface of the amygdala, right next to the brain's smell areas. They receive signals directly from the olfactory bulb, the first station for smell. They help link smells with emotions and with social information, such as chemical signals from other animals. This close link is part of why a scent can stir up strong feelings in an instant.
Where it is
On the inner surface of each amygdala, near the front of the temporal lobe, right beside the brain's main smell cortex.
What it does
Receiving smells
It gets smell signals straight from the olfactory bulb, without a stop at the thalamus.
Linking scents to feelings
It helps decide whether a smell is appealing or alarming, like fresh bread versus smoke.
Social signals
In many mammals, it helps read chemical signals, such as pheromones, sent by others of the same species.
Built-in reactions
Studies in mice show that some smells can trigger inborn attraction or avoidance through this area.
Think of it as the amygdala's nose, sniffing out what a smell might mean for you and for the people around you.
Works with
- Olfactory nerve & bulb (I)The olfactory bulb sends smell signals to it directly, one of the shortest routes from any sense to the emotional brain.
- Basolateral amygdalaIt shares smell information with the basolateral complex, which learns whether a smell predicts something good or bad.
- Centromedial amygdalaIt works with the medial nucleus to turn social smells into behavior.
- HypothalamusTogether with the hypothalamus, it helps link smells to basic drives such as mating.
When it goes wrong
Early smell loss
Losing the sense of smell can be an early sign of Parkinson's and Alzheimer's disease, often appearing before the better-known symptoms.
For learning only, not medical advice. If you have a health concern, talk to a doctor.
Surprising facts
- Smell is the only sense that reaches the amygdala without first passing through the thalamus, which may be why scents can trigger emotions so quickly.
- Brain scans suggest this area also responds to social information, such as faces, hinting that it helps with social life in humans too.
Where the name comes from
"Superficial" means near the surface. These nuclei lie on the surface of the amygdala. They are also called "cortical" because their layered look resembles the cortex.
Quick quiz
3 questions. Your answers are saved and come back in your daily review.
Which of these is a job of the superficial (cortical) nuclei?
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Receiving smells. It gets smell signals straight from the olfactory bulb, without a stop at the thalamus.
Receiving smells. It gets smell signals straight from the olfactory bulb, without a stop at the thalamus.
The superficial (cortical) nuclei is part of which larger structure?
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Amygdala. It belongs to the amygdala.
Amygdala. It belongs to the amygdala.
Which part fits this description? "Like the amygdala's nose, sniffing out what a smell might mean for you and for the people around you."
Show the answer
Superficial (cortical) nuclei. It is the superficial (cortical) nuclei. The amygdala's smell-and-social corner, where scents meet feelings.
Superficial (cortical) nuclei. It is the superficial (cortical) nuclei. The amygdala's smell-and-social corner, where scents meet feelings.
These parts now come back in your daily review, just before you would forget them.
Practice it and its neighbors in 3DSources
- 8.3 The Olfactory System, OpenStax, Introduction to Behavioral Neuroscience
- 3.4 The Brain and Spinal Cord, OpenStax, Psychology 2e
- Neuroanatomy, Amygdala, StatPearls, NCBI Bookshelf
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