Whitehead believed there was a close identification of rhythm with 'the causal counterpart of life; namely, that wherever there is some rhythm there is some life, only perceptible to us when the analogies are sufficiently close. The rhythm is then the life'.
McGilchrist via Whitehead advances rhythm as an ontological co-terminus with life itself, such that the presence of rhythm anywhere signals some form of vitality and the end of one rhythmic cycle seamlessly initiates the next.
, The Matter with Things: Our Brains, Our Delusions, and the Unmaking of the World, 2021thesis