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ANATOmical direction.docx

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University of Toronto Scarborough
Biological Sciences

dissection of the frog3202012 111100 AM Need this for lab reportAnatomical direction Proximal is the waistwhere the stimulator is The distal end is the knee joint where te receptor is This was used in the frog nerve experimentContents about lab 9Gastronomical muscleThe calfBetween the ankle and the knee Knee bone is on the upper clampThe tendonankle is attached to the needle penAll the weights are used in the part II Increase the voltage until you see the first twitch the needle pen draws the first bump on the revolving graph you measure the amplitude of the peak bumpo so first graph Amplitude vs voltage you keep incraseing the voltages until the ampliteu of the peak doesnt change anymore thats your maximal voltage level off on the curvewhat is spatial summationin compound AP in have one nerve and many axonso see higher and higher peaks of APas you recruit more and more axons same with muscle many motor units for each muscle fibreo as you increase V you increase more and more of the units o until all the muscle units are activated and no more increase in the amplitude of the peakburp observedcontraction of the muscleget your maximal voltage associated with the maximal amplitude
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