Neuroscience

eLife Assessment

This valuable study applies transcranial direct current stimulation (tCDS) to the prefrontal cortex of non-human primates during two states: (1) propofol-induced unconsciousness; and (2) wakeful performance of a fixation task. The analysis offers incomplete evidence to indicate that the effect of tDCS on brain dynamics, as recorded with functional magnetic resonance imaging, is contingent on the state of consciousness during which the stimulation is applied. The findings will be of interest to researchers interested in brain stimulation and consciousness.

eLife Assessment

This valuable study uses an original approach to address the longstanding question of why reaching movements are often biased. The combination of a wide range of experimental conditions and computational models is a strength. However, the modeling assumptions are not well-substantiated, the modeling analysis is insufficient with its focus on fits to average and not individual subject data, and the results are limited to biases in reach direction and do not consider biases in reach extent. Taken together, the evidence supporting the main claims is incomplete.

eLife Assessment

This valuable study investigated the appearance of ultrasonic vocalizations around 44 kHz that occurs in response to prolonged fear conditioning in male rats. Evidence in support of the conclusions is solid and may be of interest to some researchers also investigating distress-related ultrasonic vocalizations.

eLife Assessment

This is a valuable manuscript analyzing single-cell RNA-sequencing data from the mouse vomeronasal organ. Convincing evidence in this manuscript allows the authors to identify and verify the differential expression of genes that distinguish apical and basal vomeronasal neurons. The authors also show that Gnao1 neurons exhibit enriched expression of ER-related genes, which they verify with in situ hybridizations and immunostaining and also explore via electron microscopy.

eLife Assessment

This important work compares the strain properties of a-synuclein fibrils isolated from LBD and MSA patient samples with the resulting amplified fibrils following SAA. Using orthogonal biochemical and structural approaches to strengthen their analyses, the authors provide solid evidence that the SAA-amplified fibrils do not recapitulate the disease-relevant strains present in the patient samples. CryoEM would further strengthen this data but it is outside the scope of the work. This work should be considered in the widespread applications of SAA in synucleopathies and its potential limitations.

eLife Assessment

This is a fundamental research study which identifies some of the molecular mechanisms underlying the energy costly process of memory consolidation. The strength of evidence is exceptional. The paper should be of broad interest because it establishes a clear mechanistic link between long-term memory processes and the energy-producing machinery in neurons.

eLife Assessment

This manuscript provides important new insight into the mechanisms underlying seasonal physiology, using medaka fish as a functional genetic model that naturally exhibits photoperiodic responses. The authors provide a range of data that implicate agrp1 in feeding regulation in response to photoperiod and reproductive status. This paper provides solid evidence connecting the effects of long and short photoperiods on the food intake of female medaka fish and egg production. It will be of relevance for biologists interested in understanding the molecular and cellular underpinnings of environmental effects on animal biology.

eLife Assessment

This manuscript reports on the effects of a single dose of methamphetamine vs placebo on a probabilistic reversal learning task with different levels of noise, in a large group of young healthy volunteers. The paper is well written and the methods are rigorous. The findings are valuable and have theoretical or practical implications for a subfield. The strength of the evidence is solid, with the methods, data, and analyses broadly supporting the claims with only minor weaknesses.

eLife Assessment

This study presents a useful characterisation of the topographical organisation of the human pulvinar, an associative thalamic subregion crucial for visual perception and attention. The evidence supporting the conclusions is solid given the multimodal validation and replication across datasets, although even higher-resolution imaging data would have strengthened the study. The manuscript would also be strengthened by clarifying how the work extends previous assessments of thalamic connectivity and expanding the results with a more digested interpretation of the findings and validation of the segmentation quality. With these components strengthened, the work would be of interest to neuroscientists, neurologists, and neuropsychiatrists working on pulvinar functioning in health and disease.

eLife Assessment

This valuable study describes an apparatus, workflow, and proof-of-concept data for a system to study social cooperation in marmosets, an increasingly popular primate model for neuroscience. The apparatus and methodology have clear and convincing advantages over conventional methods based on manual approaches. However, claims of faster social learning or of finer-grained behavioural analysis in this setup will require further corroboration.