In hyperactive children the arms must first be restrained by holding them tight in our hands. Montessori Elementary Materials Maria Montessori We must stimulate the apathetic and the sluggish; we must moderate the hyperactive; we must correct paresis, tics, etc.
Isotonic contractions are those which cause the muscle to change length as it contracts causing movement. There are two types of isotonic contraction: -. Concentric. A concentric contraction is a type of muscle contraction in which the muscles shorten while generating force.
shortening contraction a muscle contraction in which the ends of the muscle move closer together, as when a flexed limb is extended. tetanic contraction sustained muscular contraction without intervals of relaxation.tonic contraction tetanic c. twitch contraction twitch.ourglass contraction contraction of an organ, as the stomach or uterus, at or near the middle. isometric contraction muscle contraction without appreciable shortening or change in distance between its origin and insertion. Isotonic (A) and isometric (B) contraction.