some research links

Yoga therapy and polyvagal theory: the convergence of traditional wisdom and contemporary neuroscience for self regulation and resilience.

From Marlysa Sulivan et al, published in Frontiers of Human Neuroscience in 2018.

Neurophysiological and neurocognitive mechanisms underlying the effects of yoga based practice - towards a comprehensive theoretical framework.

From Laura Schmalzl et al, published in Frontiers in Human Neuroscience in 2015.