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MUSCLE PHYSIOLOGY IN ORTHODONTICS

  • Muscles as a whole helps to orient the basic structure of human body. For every movement to take place an association has  to be there between the bones and muscles.A thorough knowledge of muscles is a must for proper delivery of orthodontic and orthopedic treatment .
  • It consists of 50% of total body weight.apart from regulating the body position,it helps to maintain proper organ volume ,generates heat and propels fluid.
  • Study of muscles is called as myology
  • Four functions enable homeostasis:
  • Electrical excitability or irritability:is the ability to respond to certain stimuli by producing signals,examples are autorythmic electrical signals or chemical stimuli such as neurotransmitters.
  • Contractility is the ability of muscle tissue to contract forcefully when stimulated by an action potential.isometric and isotonic contractions.
  • Extensibility is the ability to be stretched without being damaged.
  • Elasticity is the ability to return to original length and shape after contraction and extension.

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