Marcus Ghosh
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marcusghosh.bsky.social
Marcus Ghosh
@marcusghosh.bsky.social
Computational neuroscientist.

Research Fellow @imperialcollegeldn.bsky.social and @imperial-ix.bsky.social

Funded by @schmidtsciences.bsky.social
Actually, according to an eLife information session, eLife desk reject ~90% of submissions.

So the ones which do get reviewed tend to be high-quality!

Even if, like the paper @neural-reckoning.org is referring to, the reviewers don't agree with everything.
November 27, 2025 at 4:04 PM
Excited to read!

You may be interested in our recent work too!

We define 128 RNN architectures then compare their behaviour and dynamics (using gradient-based metrics).

bsky.app/profile/marc...
How does the structure of a neural circuit shape its function?

@neuralreckoning.bsky.social & I explore this in our new preprint:

doi.org/10.1101/2025...

🤖🧠🧪

🧵1/9
November 25, 2025 at 9:00 AM
For the two I've held at Imperial, applications will open summer 2026, for a September 2027 start.

* AI in Science (2 years) - www.imperial.ac.uk/ix-ai-in-sci...
* ICRF (4 years) - www.imperial.ac.uk/research-and...
November 24, 2025 at 4:37 PM
I'm always open to talking about postdoctoral fellowships!

I'm not quite ready to post my applications online, but am happy to share them privately.

Just DM or email me 🙂
November 24, 2025 at 3:37 PM
@neural-reckoning.org and I defined a taxonomy of neural network architectures, which we exhaustively explored!

We think these models (pRNNs) are exciting for thinking about structure-function relations in artificial and biological neural networks.

bsky.app/profile/marc...
How does the structure of a neural circuit shape its function?

@neuralreckoning.bsky.social & I explore this in our new preprint:

doi.org/10.1101/2025...

🤖🧠🧪

🧵1/9
November 20, 2025 at 9:17 AM
Congratulations!

Hopefully see you somewhere in Europe soon!
November 19, 2025 at 1:11 PM
For physical systems yes (from hydraulics to computers)!

But, I don't remember seeing an algorithm-centric version?
September 29, 2025 at 12:21 PM
Congratulations!

Exciting to see an inversion of NeuroAI too
September 24, 2025 at 6:26 AM
Really neat!

It could be interesting to explore heterogenous neuromodulation?

In this case, having multiple modulator networks which act at different timescales and exert different effects on the downstream SNN?

This would be a bit closer to neuromodulators in vivo.
September 19, 2025 at 8:57 AM
Congratulations!
September 17, 2025 at 6:31 PM
What I was trying to highlight is that it is possible to observe low dimensional structure in population activity which is unrelated to the computation / task.

And it's not obvious that this problem vanishes in more complex circuits?
September 11, 2025 at 8:10 AM
I think by adding a mixture of noise, delays etc, we may not end up at d=1.

But even if we did, many studies would describe these "population dynamics" as a line attractor.

Rather than just a single neuron acting on it's own?
September 10, 2025 at 3:39 PM
Its good to see that there are causal studies.

But, these seem to be the exception?

And perhaps the language used in the non-causal studies can be a bit misleading?

For instance, the post that launched this thread claimed that "the brain uses distributed coding" (based on solely on recordings).
September 10, 2025 at 3:17 PM
What I was trying to highlight is that it is possible to observe low dimensional structure in population activity which is unrelated to the computation / task.

And it's not obvious that this problem vanishes in more complex circuits?
September 10, 2025 at 3:17 PM
The toy circuit is very simple. But I'd be happy to say it computes?

For example, given LIF dynamics it could perform temporal coincidence detection (only outputting spikes in response to inputs close together in time).
September 10, 2025 at 3:17 PM
I think by adding a mixture of noise, delays etc, we may not end up at d=1.

But even if we did, many studies would describe these "population dynamics" as a line attractor.

Rather than just a single neuron acting on it's own.
September 8, 2025 at 3:12 PM
Causal experiments could help to untangle this.

But, it seems like this remains underexplored?

Keen to hear your thoughts @mattperich.bsky.social, @juangallego.bsky.social and others!

www.nature.com/articles/s41...

🧵5/5
A neural manifold view of the brain - Nature Neuroscience
Recent advances in neuroscience have revealed how neural population activity underlying behavior can be well described by topological objects called neural manifolds. Understanding how nature, nurture...
www.nature.com
September 8, 2025 at 1:44 PM