Question

Match the terms to these definitions.
Abductor, adductor, false rib, joint, supinator, rigor mortis, motor, end-plate, spasm, pronator, muscle twitch
.......... is an involuntary and abnormal muscular contraction.

Answer 1

Spasm is an involuntary and abnormal muscular contraction.

• Any muscle that pulls the body part towards the midline is called an adductor.
  
• The abductor is the opposite of the adductor.
  
• A false rib is those which do not directly articulate with the sternum rather they join the 7th pair of ribs. False ribs are 8th, 9th and 10th.
  
• Rigor mortis is the extreme rigidity of the body after death due to complete depletion of ATP and phosphocreatine.
  
• Supinator is a broad muscle in the posterior compartment of the forearm that helps to supinate it.
  
• Pronator is the muscle in the forearm that turns the forearm so that the palm faces posteriorly.
  
• A muscle twitch is a small, local, involuntary, muscle contraction and relaxation which may be visible under the skin.