DefinitionUncoordinated movement is muscle control problem or an inability to finely coordinate movements, which results in a jerky, unsteady, to-and-fro motion of the middle of the body (trunk) and unsteady gait (walking style). The condition is called ataxia.Alternative NamesLack of coordination; Loss of coordination; Coordination impairment; Ataxia; Clumsiness; Uncoordinated movementConsiderationsSmooth graceful movement results from a fine balance between opposing muscle groups. This balance is coordinated by a portion of the brain called the cerebellum.Diseases that damage the cerebellum, spinal cord, and peripheral nerves can interfere with normal muscle movement and result in coarse, jerky, uncoordinated movement, called ataxia.Ataxia may be the result of a defect that is present fr