Neuroscience

eLife Assessment

This important study provides a quantitative comparison of how zebrafish and medaka larvae process visual motion, revealing clear differences in how they integrate information across space and time. The evidence is convincing, combining a broad set of behavioral assays with response decomposition and mechanistic modeling that together support the central conclusions. Some aspects remain incomplete, particularly the link between the spatial and temporal findings, the extent to which the model accounts for the full range of behavioral results, and the framing of broader evolutionary or social interpretations. Overall, the work offers a careful and informative analysis that should be of broad interest to researchers studying visual processing, sensorimotor computation, and comparative neuroscience.

eLife Assessment

This study presents a large-scale characterization of single-neuron responses during reading and listening, enabling examination of both 'low-level' (orthographic/phonological) and 'higher-level' (syntactic) features, as well as links between single-neuron activity and multi-scale field potentials, making it a valuable resource for bridging micro- and macroscale accounts of language processing. The analyses identify modality-specific and putatively modality-independent responses across distributed brain regions, offering an intriguing framework for understanding how sensory-specific and abstract representations may relate. However, the evidence supporting the central claims is currently incomplete, due to limited population-level quantification, insufficient statistical characterization of how many neurons encode the relevant features, ambiguity in the interpretation of encoding model results, and a lack of rigorous tests of cross-modal generalization and alternative accounts, which together weaken the conclusions about amodal representations and hierarchical processing.

eLife assessment

This is a valuable survey of movements and locomotor patterns produced by circuits in the medial reticular formation (MRF) of the brainstem. The authors provide solid evidence that activation of GABAergic MRF neurons slowed down walking, activation of glutamatergic neurons induced a specific "shuffle" limb trajectory, and the activation of serotonergic neurons increased locomotor speed without affecting walking signature. This study adds to the growing body of knowledge about the effects of brainstem circuits on specific aspects of locomotor function.

eLife Assessment

This important study examines the effects of diet and exercise on brain structure and behaviour in the 3xTg mouse model of Alzheimer's disease. They show that combined access to a low-fat diet and exercise improves regional brain volume and behaviour in transgenic and wild-type control mice in a sex-specific manner, with analyses linking functional improvements to glucose homeostasis. Although some claims are well supported, the overall strength of the evidence is incomplete and hampered by a lack of clarity regarding the statistical analyses chosen. The work may be of interest to researchers studying neurodegenerative disease, particularly in preclinical contexts.