1) Facilitation techniques in physical therapy aim to stimulate the sensory system to elicit a motor response, based on principles of associative learning. 2) While techniques like NDT and PNF have focused on stimulus-response relationships, a modern understanding recognizes that the brain learns through perception and goal-directed responses rather than simple conditioning. 3) Effective facilitation should incorporate active-assisted learning during functional activities, allowing patients to achieve motor responses without constant sensory cues, in line with theories of associative learning.