11-16-07 anatomy notes

11-16-07 anatomy notes - 11-16-07 anatomy notes1.Muscular...

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Unformatted text preview: 11-16-07 anatomy notes1.Muscular Systema.Muscle Physiologyi.Muscle Physiology1.Resultsa.It takes 2 consecutive max stimuli to stimulate muscleb.2ndafter refracting period, before relaxation periodc.Significance: refractionary period is so short-wave summation allowed basis for tetanic contractionsii.Tetanus or Tetanic Contractions1.Conditions-rapid succession of maximal stimuli over short time to muscle2.Results-sustained contraction w/o relaxation to resting length3.Types (2 types of titanic contractions)a.Incomplete Tetanus-give 10 stimuli/secondi.Continual state of contraction accompanied by partial relaxation between twitches1.relaxation does not go to resting lengthii.Complete Tetanus-20 stimuli/second1.rate of stimulation is high2.continual state of contractiona.NO relaxation at all3.2-4X stronger than simple twitch contraction4.Significance of Tetanic Contractionsa.The way that muscles contract in the bodyb.Results in even, smooth contractions/muscle movementsc.Asynchronous-some motor...
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11-16-07 anatomy notes - 11-16-07 anatomy notes1.Muscular...

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