Increased c-Fos expression in lateral habenula during social transmission of negative valence in prairie voles.

No direct measure of consoling or grooming between the partners, so the authors cannot show that social buffering is why the reunited pairs showed no effect. The c-Fos findings are correlational. The study cannot show that the lateral habenula causes social learning, and the authors say optogenetic or similar experiments are needed. The day-two freezing difference in observers was borderline (p = 0.049) and the groups are modest in size. The call-length and call-power findings were exploratory and, in the authors' words, need replication; calls were recorded in only a subset of observers. The paper reports no human participants. Everything here is in prairie voles, so it does not directly test autism or any therapy in people. Observers did not freeze more than controls while watching the shocked partner; the authors interpret the correlation in freezing instead as a form of emotional contagion rather than learning.

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Do not read this as evidence about autism or about any treatment for social difficulties in people. The work was done in prairie voles, and the brain finding is a correlation between c-Fos staining and behaviour, so it cannot show that the lateral habenula causes anything. The one significant day-two freezing difference is also borderline (p = 0.049) and disappeared entirely when the pair were housed together overnight.