Fictive Scratching Patterns in Brain Cortex-Ablated, Midcollicular Decerebrate, and Spinal Cats

BACKGROUND The spinal cord central pattern generators (CPG) have been explained by symmetrical half-center hypothesis, the bursts generator, by computational models and more recently, connectome circuits. Asymmetrical models are conformed by extensor and flexor CPG modules at odds with the half-center paradigm. Other models include not only flexor and extensor motoneurons, but also motoneurons pools controlling biarticular muscles. It is unknown...