Which point of the muscle picks up impulses from the brain?

The point of the muscle that picks up impulses from the brain is the neuromuscular junction, where motor neurons communicate with muscle fibers. The axon terminals of the motor neurons release neurotransmitters, such as acetylcholine, which bind to receptors on the muscle cell membrane. This process triggers an action potential in the muscle fiber, leading to contraction. Thus, the neuromuscular junction serves as the critical interface for communication between the nervous system and muscles.