Our main finding is that the motor cortex is a flexible pattern generator, and sends rhythmic signals down the spinal cord…The brain has had an evolutionary goal to drive movements that help us survive. The primary motor cortex is key to these functions. The patterns of activity it displays presumably derive from evolutionarily older rhythmic motions such as swimming and walking. Rhythm is a basic building block of movement.
Andrew Myers (Futurity) | Neurons send ‘rhythmic signals’ down spine