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A sparsely connected network, organized in clusters, identified in the rat lateral amygdala shows potentiation between recruited neurons after fear conditioning. This implies a mechanism for encoding multiple memories with a small number of neurons.
Sustained antidepressant effect of ketamine involves restoration of glutamatergic synapses. Here, authors show that several planar cell polarity proteins reduced with stress hormone administration and increased with ketamine treatment are required for synapse restoration.
Mechanical allodynia can be socially transferred. Here, authors show that a small population of mice exhibit resilience to socially transferred allodynia, an active process mediated by ventral tegmental area glutamatergic circuits.
Brain evolution at the cellular level is understudied. Here, the authors compare olfactory circuits from three Drosophila species, finding species-specific connectivity patterns associated with food odours and suggesting that more connectivity may be related to learning performance.
A lesion symptom mapping and lesion network mapping study suggests that lesions in the left ventral thalamic nuclei, linked to thalamic aphasia, map onto a common left-hemispheric network, with Broca’s area showing the strongest associations.
In this Journal Club, Izumi Fukunaga discusses John Hopfield’s 1995 paper, which proposed a mechanism by which a continuously variable sensory stimulus can be transformed into a timing-based code.
The main direction of motor skill-specific information between rat primary motor cortex and dorsolateral striatum is shown to switch from cortex-predominant before learning to striatum-predominant after learning.