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Increased levels of matrix metalloproteinase 8, expressed by circulating myeloid cells, may have a role in stress-induced changes in social behaviour in mice.
How does motor-cortex activity well before movement not drive motor outputs? In this Review, Churchland and Shenoy detail how searching for answers transitioned the understanding of neural activity during movement from single-neuron tuning towards population-level factors and revealed an essential computational role of output-null factors.
Sub-additive responses to simultaneously presented stimuli and quenching of variability in responses to repeated presentations of a stimulus are characteristics of neurons in the primary visual cortex. In this Perspective, Goris et al. argue that these phenomena often co-occur and may have common mechanistic and computational origins.
Sleep is an active state during which the synaptic connections that form memories are remodelled. In this Perspective, Wassing and colleagues discuss how failures in sleep-dependent adaptation to emotionally distressing experiences might be a key contributor to post-traumatic stress disorder and related conditions.
Altered network activity during sleep is observed in some individuals with Alzheimer disease and in mouse models of the disorder. In this Perspective, Inna Slutsky proposes that hyperexcitability and sleep disturbances in Alzheimer disease result from disruption of the mechanisms that maintain activity homeostasis in the brain.
