Daily Neuroscience for 23 May: Dopamine Learning Signals, Hippocampal State Coding, Brainstem Cortex Hubs, Instinctive Fear Control

Neuroscience Daily for 29 May: Newborn Brain Differences, Insula Action Maps, EEG fNIRS Coupling, Connectome Behavior Modules

Neuroscience Daily for 29 May follows 4 stories from r/neuro and r/neuroscience, moving through newborn brain differences, insula action maps, eeg fnirs coupling, connectome behavior modules. 1. Newborn Brain Differences A study in Biology of Sex Differences looked at brain MRI data from 514 newborns to ask whether average structural differences between male and female infants are already present at birth. The researchers report that males had larger total brain volume on average, while females showed relatively greater cortical gray matter volume after adjusting for overall brain size, with additional regional differences in areas like the anterior cingulate, parietal cortex, and corpus callosum. Source link [https://bsd.biomedcentral.com/articles/10.1186/s13293-024-00657-5] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1jglyh2/sex_differences_in_human_brain_structure_at_birth/] 2. Insula Action Maps A review in Progress in Neurobiology argues that the insula should be understood not just as a place for feeling internal body states, but as a set of distinct circuits that turn sensory information into specific actions and visceromotor responses. Using macaque tracing data, resting-state fMRI, and intracortical stimulation maps, the authors describe separate insular fields linked to behaviors like oroalimentary actions, hand movements, emotional reactions, and more axial or proximal motor control. Source link [https://www.sciencedirect.com/science/article/pii/S0301008225000395] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1j8vd39/anatomofunctional_organization_of_insular/] 3. EEG fNIRS Coupling A Scientific Reports paper compared structure-function coupling across simultaneous EEG and fNIRS recordings to see how electrical activity and slower blood-flow signals line up with the brain's structural wiring. Across 18 participants, the authors found that fNIRS coupling at rest most closely resembled slower-frequency EEG coupling, while local patterns differed by network and by task, especially during motor imagery. Source link [https://www.nature.com/articles/s41598-024-79817-x] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1gz13uo/comparing_structurefunction_relationships_in/] 4. Connectome Behavior Modules A Nature Neuroscience paper used a full synaptic wiring diagram of the larval zebrafish brainstem to predict how different circuit modules support behavior, then checked those predictions against physiological recordings. The authors identified strongly connected modules tied to eye and body movement control, and within the eye-movement system they found recurrent cycles consistent with the attractor-style dynamics long proposed for oculomotor integration. Source link [https://www.nature.com/articles/s41593-024-01784-3] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1gyrwc2/predicting_modular_functions_and_neural_coding_of/] That's it for today.

Neuroscience Daily for 28 May: Ketogenic Neuroprotection, Tongue Touch Mapping, NMDA Receptor Gating

Neuroscience Daily for 28 May follows 3 stories from r/neuro and r/neuroscience, moving through ketogenic neuroprotection, tongue touch mapping, nmda receptor gating. 1. Ketogenic Neuroprotection A new review in Translational Neurodegeneration argues that ketogenic diets remain one of the more plausible metabolic strategies for slowing neurodegenerative damage. The paper lays out several possible mechanisms, including giving neurons ketone bodies as an alternative fuel when glucose metabolism is impaired, while also reducing oxidative stress, calming inflammation, and affecting autophagy, protein aggregation, and the gut microbiome. Source link [https://link.springer.com/article/10.1186/s40035-026-00557-1] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1to5nxr/the_ketogenic_diet_may_protect_against_alzheimers/] 2. Tongue Touch Mapping A Nature paper looked at how mice re-aim their tongues when a water spout suddenly shifts position during licking, and it points to a surprisingly central role for the lateral superior colliculus. The researchers found that the animals used both touch feedback and tongue-position information to adjust the next lick in real time. Source link [https://www.nature.com/articles/s41586-024-08339-3] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1hrvqmp/a_collicular_map_for_touchguided_tongue_control/] 3. NMDA Receptor Gating A Neuron paper is giving researchers a much more detailed look at a tri-heteromeric NMDA receptor subtype called GluN1-2B-2D, which is relevant to synaptic signaling and potentially to drugs like ketamine. The study focuses on how this receptor opens, closes, and gets blocked, and it describes a new inhibition mechanism involving mechanical decoupling between specific subunit linkers. Source link [https://www.cell.com/neuron/fulltext/S0896-6273(25)00039-X] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1jwsxg5/structural_basis_for_channel_gating_and_blockade/] That's it for today.

Daily Neuroscience for 27 May: Postmortem Brain Testing, Ketogenic Neuroprotection, Stuttering Dopamine Model

Daily Neuroscience for 27 May follows 3 stories from r/neuro and r/neuroscience, moving through postmortem brain testing, ketogenic neuroprotection, stuttering dopamine model. 1. Postmortem Brain Testing A Science report is drawing attention to a startup that keeps donated human brains perfused after death so researchers can test drugs in tissue that is closer to the real human target. The basic idea is not to revive consciousness, but to preserve enough cellular structure and chemistry to study diseases like Alzheimer's and Parkinson's in a more realistic model than mice or isolated cells. Source link [https://www.science.org/content/article/not-alive-not-dead-disembodied-human-brains-used-drug-testing] Reddit discussion [https://www.reddit.com/r/neuro/comments/1to8o24/the_brain_hovers_between_life_and_death_drugmaker/] 2. Ketogenic Neuroprotection A new review in Translational Neurodegeneration argues that ketogenic diets remain one of the more plausible metabolic strategies for several neurodegenerative diseases, including Alzheimer's, Parkinson's, and Huntington's. The paper says ketone bodies may help by giving neurons an alternative fuel source when glucose handling is impaired, while also influencing oxidative stress, inflammation, autophagy, protein aggregation, and even the gut microbiome. Source link [https://link.springer.com/article/10.1186/s40035-026-00557-1] Reddit discussion [https://www.reddit.com/r/neuro/comments/1to5n8b/the_ketogenic_diet_may_protect_against_alzheimers/] 3. Stuttering Dopamine Model A Frontiers in Human Neuroscience review shared through PMC offers a broad new framework for developmental stuttering that tries to connect speech-motor control, dopamine signaling, emotional context, and self-monitoring into one model. Instead of treating stuttering as the result of a single broken circuit, the review argues that changes in gray matter, white matter, blood flow, metabolic activity, and dopamine can all reinforce one another in a circular way. Source link [https://pmc.ncbi.nlm.nih.gov/articles/PMC13099768/] Reddit discussion [https://www.reddit.com/r/neuro/comments/1tntlh6/unraveling_the_mystery_of_stuttering_clinical_and/] That's it for today.

Daily Neuroscience for 26 May: Endocannabinoid Transport Debate, Cortical Precision Debate, Brain Energy Map, Blood Brain Barrier Review

Daily Neuroscience for 26 May follows 4 stories from r/neuro and r/neuroscience, moving through endocannabinoid transport debate, cortical precision debate, brain energy map, blood brain barrier review. 1. Endocannabinoid Transport Debate This story from r/neuro is about a live debate over whether the brain really has a dedicated transporter for the endocannabinoid anandamide. The original post points to the drug candidate SYT-510, notes that some researchers still think anandamide uptake may be explained mostly by diffusion and enzymatic breakdown, and cites an older paper arguing against a clearly identified transporter. Source link [https://www.reddit.com/r/neuro/comments/1tnnxv9/does_a_biological_endocannabinoid_transporter/] Reddit discussion [https://www.reddit.com/r/neuro/comments/1tnnxv9/does_a_biological_endocannabinoid_transporter/] 2. Cortical Precision Debate A discussion in r/neuro asks whether cortical inhibition and competition between neurons can be thought of as something like a fixed bit precision. The post sketches a rough back-of-the-envelope argument: if a neuron competes with thousands of other neurons through inhibitory connections, maybe the neocortex is operating with an effective precision of around ten to twelve bits. Source link [https://www.reddit.com/r/neuro/comments/1tnf85e/inhibition_mechanism/] Reddit discussion [https://www.reddit.com/r/neuro/comments/1tnf85e/inhibition_mechanism/] 3. Brain Energy Map This story from Nature is about an unusually detailed map of mitochondrial respiratory capacity across the human brain. The paper, shared in r/neuroscience with a long abstract, describes a voxel-by-voxel analysis of a frozen human hemisphere, measuring oxidative phosphorylation enzyme activity, mitochondrial DNA, mitochondrial density, and related energy traits across 703 brain regions. Source link [https://www.nature.com/articles/s41586-025-08740-6] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1jksox0/a_human_brain_map_of_mitochondrial_respiratory/] 4. Blood Brain Barrier Review This story from MDPI is about a review of how the blood-brain barrier shapes the development of brain metastases. The shared summary argues that the barrier is not just a passive wall, because its cells and signalling pathways can both resist tumour invasion and, under some conditions, become part of the environment that helps tumour cells survive or spread. Source link [https://www.mdpi.com/3139220] Reddit discussion [https://www.reddit.com/r/neuroscience/comments/1j2ea7t/hello_everyone_id_like_to_share_a_review_article/] That’s the briefing for 26 May.

Daily Neuroscience for 25 May: Cerebellar Synapse Counts, Predictive Suffering Models, Brain Information Processing

Daily Neuroscience for 25 May follows 3 stories from r/neuro and r/neuroscience, moving through cerebellar synapse counts, predictive suffering models, brain information processing. 1. Cerebellar Synapse Counts This story from r/neuro is about how many synapses the cerebellum may have, and whether common brain-connection estimates are being overstated. The original post notes that the cerebellum holds a huge share of the brain’s neurons but asks what share of total synapses it actually accounts for. Source link [https://www.reddit.com/r/neuro/comments/1tm5fdf/the_cerebellum_packs_80_of_the_brains_neurons/] Reddit discussion [https://www.reddit.com/r/neuro/comments/1tm5fdf/the_cerebellum_packs_80_of_the_brains_neurons/] 2. Predictive Suffering Models This story from r/neuro is about a post arguing that ordinary, non-clinical human suffering may be better understood through predictive processing and Buddhist ideas about craving, aversion, and clinging. The post says the self and the world are built from prior experiences, and that suffering grows when those models resist updating in the face of reality or uncertainty. Source link [https://www.reddit.com/r/neuro/comments/1tjbdwq/the_neuroscience_of_nonpathological_human/] Reddit discussion [https://www.reddit.com/r/neuro/comments/1tjbdwq/the_neuroscience_of_nonpathological_human/] 3. Brain Information Processing A discussion in the neuroscience community on Reddit asks what “processing information” actually means in brain science. The original question is simple and honest: the poster wants a plain-language explanation of a term that gets used a lot but often sounds vague. Source link [https://www.reddit.com/r/neuro/comments/1tkj4x2/what_does_processing_of_information_mean/] Reddit discussion [https://www.reddit.com/r/neuro/comments/1tkj4x2/what_does_processing_of_information_mean/] That’s the briefing for 25 May.