Social touch is an integral part of communication among many species, yet understanding the underlying pathways and mechanisms remains an intricate challenge. In this episode, we are joined by Dr. Dobolyi, whose research has brought new light to this fascinating area.

Dr. Dobolyi's study revolves around the discovery of a novel neuronal pathway from the posterior intralaminar thalamic nucleus (PIL) to the medial preoptic area (MPOA) that plays a key role in controlling social grooming. The groundbreaking findings reveal that neurons in both the PIL and MPOA activate naturally through physical contact between female rats or chemogenetic stimulation of PIL neurons. Interestingly, these neurons were found to express the neuropeptide parathyroid hormone 2 (PTH2), and it was observed that central infusion of its receptor antagonist diminished social grooming.

Intriguingly, the study also shows a similarity in the anatomical organization of the PIL and the distribution of the PTH2 receptor in the MPOA between rat and human brains, suggesting this pathway's potential relevance in human social behavior.

Join us as we delve deep into the world of neurobiology, exploring the intricacies of social interaction and grooming behavior with Dr. Dobolyi.

Keywords: Social Grooming, Posterior Intralaminar Thalamic Nucleus, Medial Preoptic Area, Neuronal Pathway, Parathyroid Hormone 2, Neurobiology, Social Behavior.

A thalamo-preoptic pathway promotes social grooming in rodents https://doi.org/10.1016/j.cub.2022.08.062 Social interaction increases activity in the posterior thalamus (PIL)