Neuroscience Daily for 19 August: Efficient Coding, Dopamine Dips, Semaglutide Hunger Circuit
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Neuroscience Daily for 19 August: Efficient Coding, Dopamine Dips, Semaglutide Hunger Circuit
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Neuroscience Daily for 19 August follows 3 stories from r/neuro and r/neuroscience, moving through efficient coding, dopamine dips, semaglutide hunger circuit.
Chapters
- 00:00:00 — Intro
- 00:00:10 — Efficient Coding
- 00:01:08 — Dopamine Dips
- 00:02:07 — Semaglutide Hunger Circuit
- 00:03:14 — Closing
1. Efficient Coding
This story is about a bioRxiv preprint asking why Weber's law appears so reliably in perception. Weber's law says that the smallest noticeable change in a stimulus tends to scale with the size of that stimulus.
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Reddit discussion
2. Dopamine Dips
This story is about a bioRxiv mouse study on dopamine dips and punishment-resistant reward seeking. The researchers studied a behavior associated with addiction, where an animal keeps pursuing a reward even when the action carries a cost.
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Reddit discussion
3. Semaglutide Hunger Circuit
This story is about a PNAS study on how semaglutide recruits AgRP hunger neurons in female mice. AgRP neurons are usually associated with hunger, low energy availability, and energy conservation, so researchers have often expected GLP-1 drugs to suppress or bypass them.
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Reddit discussion
Episode closing.