Neuroscientists at the Salk Institute have proposed that neural traveling waves in the visual cortex function as a vital computational engine for processing environmental information. These electrical waves allow the brain to construct internal models of the external world, enabling several critical functions such as modulating perception, converting sensory inputs into mental representations, generating short-term predictions about surroundings, and replaying patterns related to memories. This biological mechanism is conceptually similar to how large language models learn statistical structures from data to generate meaningful outputs; however, the brain builds its generative model through direct experience with the physical world.
Researchers at Kyushu University have discovered that adolescent brain development involves more than just the traditional process of synaptic pruning.
Using super-resolution microscopy, the team identified previously unknown high-density clusters of synapses, or hotspots, that form specifically during adolescence in the cerebral cortex. This discovery suggests that while the brain is indeed trimming excess connections, it is simultaneously building new, dense neural structures.
* Challenges the singular focus on synaptic pruning during adolescence.
* Identifies specific high-density dendritic spine hotspots in Layer 5 neurons.
* Suggests that impaired formation of these hotspots, rather than just excessive pruning, may contribute to schizophrenia.
* Provides a new perspective on how cortical circuits mature during developmental windows.
Using super-resolution microscopy, the team identified previously unknown high-density clusters of synapses, or hotspots, that form specifically during adolescence in the cerebral cortex. This discovery suggests that while the brain is indeed trimming excess connections, it is simultaneously building new, dense neural structures.
* Challenges the singular focus on synaptic pruning during adolescence.
* Identifies specific high-density dendritic spine hotspots in Layer 5 neurons.
* Suggests that impaired formation of these hotspots, rather than just excessive pruning, may contribute to schizophrenia.
* Provides a new perspective on how cortical circuits mature during developmental windows.
Researchers are studying large language models as if they were living things, discovering secrets by applying biological and neurological analysis techniques. This approach is revealing unexpected behaviors and limitations of LLMs.
New research reveals that chronic brain inflammation can directly lead to repetitive behaviors, often seen in conditions like autism spectrum disorder (ASD) and obsessive-compulsive disorder (OCD). The study, conducted on mice with a mutated NLRP3 gene, found that inflammation activated microglia, leading to IL-1β release and overstimulation of NMDA glutamate receptors, resulting in anxiety and repetitive actions. FDA-approved drugs memantine and interleukin-1RA were shown to normalize brain activity and stop these behaviors.
