This document summarizes the spinal control of movement. It discusses how motor neurons innervate skeletal muscles and are wired into reflex loops in the spinal cord. The spinal cord also contains central pattern generators that provide rhythmic patterns for activities like walking. Skeletal muscle contraction is enabled by the sliding filament model where actin and myosin interact through a cross-bridge cycle powered by ATP hydrolysis. Motor neurons and calcium signaling control muscle contraction and relaxation.

1. Movement Part I Spinal Control of Movement

4. Skeletal muscles are the effectors of movement .

20. The sliding filament model of muscle contraction.

25. Actin & Myosin Interaction

43. Temporal summation of muscle contraction: muscle tension resulting from 1, 2, or a series of action potentials.

45. Structure of a vertebrate motor unit.