Types of contractions

Types of contractions

1. Electrical and mechanical events

   • ATP is required
     • For muscular contractions
       • ATP= 8 contractions

2. Twitch

   • high voltage electric shock
     • rapid contraction and relaxation

3. Summation

   • two discharges
     • another Twitch

4. Graded Contractions

   • complete stimulation
     • Of individual fibers

5. Incomplete Tetanus

   • Frequently electric shock
     • relaxation decreases
       • contraction increases

6. Complete Tetanus

   • uniform and sustained contraction