Intermuscular Coordination

Intermuscular Coordination - Optimal timing and motor unit recruitment of agonists, antagonists, synergists, neutralizers, stabilizers and fixators. Example: Role of Muscles during Hip Extension

• Prime Mover:  Gluteus maximus
• Synergists: Biceps femoris (long head), semitendinosus, semimembranosus, posterior head of adductor magnus
• Antagonists: Psoas, iliacus, tensor fascia latae (TFL), rectus femoris, anterior adductors (especially pectineus), sartorius
• Neutralizers: Gluteus minimus and anterior fibers of gluteus medius neutralize external rotation force of gluteus maximus
• Stabilizers: Deep rotators of hip
• Fixators: Intrinsic stabilization subsystem, rectus abdominis, internal and external obliques, quadratus lumborum, erector spinae

  Example from: Introduction to Functional Anatomy: Kinesiology of the Hip