Lab 03: Biofeedback and Numerical Comparison Data and Calculations (3

Lab 03: Biofeedback and Numerical Comparison Data and Calculations (3 pt) For baseline take the value at 10 seconds into the recording. Then identify the point of greatest relaxation and arousal (using Min or Max depending on whether the values went up or down). Phenomenon Table 1: HR and GSR Measurements Baseline (At 10 sec.) Greatest Relaxation Greatest Arousal Mean during Relaxation Mean during Arousal Heart Rate (BPM) 78.97 57.13 122.3 78.54 104.4 GSR (microsiemens, μS) 5.889 5.419 8.251 5.760 6.989 Analysis (5 pts) Most tissues of the body are dually innervated, meaning they receive input from both the SNS and PSNS. Is dual innervation the same as the SNS and PSNS directly inhibiting each other? Explain. – No, it is not the same. Dual innervation is some organs in the body receiving input from both systems. This allows for fine-tuning as both systems can influence the same organ. Did the minimum heart rate change meaningfully during relaxation as compared to baseline? In order to support your answer, calculate the percentage change and use this to assess whether you think the difference was noteworthy. Percentage change= Minimum value-Baseline valueBaseline value x 100 Did maximum heart rate change meaningfully during arousal as compared to baseline? In order to support your answer, calculate the percentage change (equation above, just replace “minimum value” with the maximum) and use this to assess whether you think the difference was noteworthy. Based on the relationship of the SNS and PSNS activity to heart rate, is this what you expected? Sweat glands are one of the few tissues which are not dually innervated. Based on this information, which treatment (relaxation or arousal) would you predict to have no effect on GSR? Why? Did minimum GSR change meaningfully during relaxation as compared to baseline? In order to support your answer, calculate the percentage change as above and use this to assess whether you think the difference was noteworthy. Did maximum GSR change meaningfully during arousal as compared to baseline? In order to support your answer, calculate the percentage change as above and use this to assess whether you think the difference was noteworthy. 3. In science we often summarize our data with simple statistics such as max/min or the mean. Looking at the data in BioPac, do you think that max/min or mean (or neither) is an effective summary of what you recorded? Explain why using the numbers you measured.

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