When mice hear a sound they associate with danger, they instinctively draw near a familiar companion—but not an unfamiliar one. That is the finding of a new study from Virginia Tech's Fralin Biomedical Research Institute, led by Alexei Morozov. The behavior appears to be driven by a newly identified brain circuit, which the researchers say may shed light on how social bonds shape threat responses.
The experiments paired mice with either a cagemate or a stranger. Only the familiar companion drew the mice closer during the alarming auditory cue. The difference suggests that social recognition and prior bonding are essential for this safety-seeking behavior, rather than a general drive to be near any other mouse.
The team traced the neural activity underlying this response and pinpointed a specific circuit that had not been previously linked to social threat processing. While the study is limited to rodents, the authors note that understanding such circuits could inform future research on social anxiety or trauma-related disorders in humans, where seeking familiar support is common.