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Odor intensity was not represented in a purely feedforward manner.
We observed early bottom-up communication from OB to PC, followed by top-down feedback from PC back to OB for odor intensity, not concentration.
Olfactory oscillations seems to code perception and not physical properties.
⚠️ 2-year Postdoc – Experimental Psychology, Karolinska Institutet, Stockholm 🇸🇪
Join @matsjolsson.bsky.social lab 🦠& study human behavioral defenses using experiments, fMRI & biological markers 🧠🧪
PhD in psychology, neuroscience, or related field 🎓
More info --> ki.varbi.com/en/what:job/...
Where, exactly, does learning happen in the brain?
Out today in @nature.com, we identify a synaptic locus of birdsong learning and show that the circuit can be tuned to make birds learn faster - but at a cost. Read on👇 #neuroskyence 🧪 #prattle 💬 #bioacoustics
Shareable link: rdcu.be/fiyrS
Combining a computational framework and optogenetic and chemogenetic manipulations within and downstream of the cortico-basal ganglia circuit identifies the specific cortico-basal ganglia synapse...
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Participants smelled three odors presented at low or high concentrations and rated perceived intensity on every trial.
Excited to share our new paper in PLOS Biology!
We asked a simple question: when we perceive an odor as weak or strong, does oscillations in the human olfactory system represent the physical concentration of the odor, or our subjective perception of its intensity?
🧵👇
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Thank you to all the co-authors! Irene, Mikael, @odorjohan.bsky.social and @artinarshamian.bsky.social
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Oscillatory activity in the OB and PC encoded perceived intensity.
Beta- and gamma-band activity were predicted by intensity ratings, while concentration produced much weaker effects.
This suggests that perception is already reflected in the earliest stages of the human olfactory system.
OK, I'm obsessed with this study in @science.org
It took Reddit "Am I The Asshole" posts & asked LLMs if the poster was the asshole. Aaand (surprise) AI was more likely to tell people they were NOT the asshole ... even when humans said yeah YTA 🧪
www.science.org/doi/10.1126/...
May the 4th post: a public introduction to Hilbert space, quantum field theory, and the idea that 3D space itself may emerge from quantum entanglement.
The Force as it actually is: written for everyone who never got to take Physics 113A.
Link: open.substack.com/pub/drkev/p/...
#physics đź”⚛️
How can some smells seem stronger than others despite equivalent odor concentrations? @nordenneuro.bsky.social &co show that coordinated neural activity between #OlfactoryBulb & #PiriformCortex tracks how intensely an odor is perceived (rather than concentration) @plosbiology.org 🧪 plos.io/4fQxXR5
PLOS Biology
Blythe Terrell
Kev Abazajian
Do you want to contribute to improving human health? We are currently looking for a driven and curious postdoctoral researcher who wants to join Mats J. Olsson’s research group in the Division of Ps
