A corticohypothalamic circuit that mediates maternal awakening to pup cries.

A corticohypothalamic circuit in mice links pup calls to maternal awakening, with enhanced responsiveness after motherhood and increased Drd1 expression in TeA/Ect neurons.

• Why it matters: Understanding how maternal arousal is triggered by infant cues is crucial for insights into caregiving behaviors and their neural basis, which remains poorly defined.
• What they did: The study used neural activity measurements and gene expression analysis to identify that layer 6 neurons in the TeA/Ect cortex projecting to the POA respond more strongly to pup calls after motherhood, mediated by increased Drd1 expression, and that a pathway from the auditory thalamus transmits pup cues during sleep.
• The result: This neural circuit likely enables infant cries to access arousal systems, representing a fundamental mammalian adaptation for maternal caregiving and offspring survival.