Figure 4a – Recording of Incremental Clench Force. Figure 4b – Recording of Maximum Clench Force. EMG EMG (Top channel) and Muscle Force Channels(channel) (Top channel) and Muscle Force Channels(Bottom Channel) Analysis of Data - Incremental Clench Force from the Dominant and Non-dominant Forearms Click Analysis Window button located on the top menu bar (Figure 5). Figure 5 – Shortcut buttons on LabScribe software The mathematical functions, Abs. Area, V2-V1, and T2-T1 are located above the uppermost channel. Use the mouse to click on and drag the cursors to the beginning and end of the first muscle contraction. (As shown in Figure 6). The values for the Abs. Area on the EMG and Muscle Force channels are the relative amount of electrical activity causing the contraction and relative strength of the muscle respectively. Measure and record absolute areas under the EMG and Muscle Force for each Grip Strength. Record the data on Table 1 and Excel File provided on Desktop of your Laptop. Double Click on iworx_EMG_dataTablesGraph.xls file to open and input your data A graph (scattered dot plot) will be automatically generated from your data on the Excel file. You can see the regression and linearity relationship when Grip Strength (Muscle Force) is a function of the area under the absolute integral of EMG activity. Analysis of Data – Muscle Fatigue in the Dominant and Non-dominant Forearms On the Muscle Force channel, place one cursor on the baseline, before the maximum muscle force on Muscle Force channel, and place the second cursor on the peak (max. amplitude) of the maximum muscle force. Record the V2-V1 value on Table 2 as Max Clench Force. Calculate the half (divide by 2) value of the Max Clench Force and record as 50% of Max Clench Force on Table 2. Place one cursor on the peak muscle force and move the other cursor on the top the first one to get function 0.000. Then, move the second cursor until you see the V2-V1 equals (can be approximate) to 50% of Max Clench Force. Record the time, T2-T1 at that point as Half-Max Fatigue Time on Table 2
Figure 4a – Recording of Incremental Clench Force. EMG (Top channel) and Muscle Force Channels(channel) Figure 4b – Recording of Maximum Clench Force. EMG (Top channel) and Muscle Force Channels(Bottom Channel) Analysis of Data - Incremental Clench Force from the Dominant and Non-dominant Forearms Click Analysis Window button located on the top menu bar (Figure 5). Figure 5 – Shortcut buttons on LabScribe software The mathematical functions, Abs. Area, V2-V1, and T2-T1 are located above the uppermost channel. Use the mouse to click on and drag the cursors to the beginning and end of the first muscle contraction. (As shown in Figure 6). The values for the Abs. Area on the EMG and Muscle Force channels are the relative amount of electrical activity causing the contraction and relative strength of the muscle respectively. Measure and record absolute areas under the EMG and Muscle Force for each Grip Strength. Record the data on Table 1 and Excel File provided on Desktop of your Laptop. Double Click on iworx_EMG_dataTablesGraph.xls file to open and input your data A graph (scattered dot plot) will be automatically generated from your data on the Excel file. You can see the regression and linearity relationship when Grip Strength (Muscle Force) is a function of the area under the absolute integral of EMG activity. Analysis of Data – Muscle Fatigue in the Dominant and Non-dominant Forearms On the Muscle Force channel, place one cursor on the baseline, before the maximum muscle force on Muscle Force channel, and place the second cursor on the peak (max. amplitude) of the maximum muscle force. Record the V2-V1 value on Table 2 as Max Clench Force. Calculate the half (divide by 2) value of the Max Clench Force and record as 50% of Max Clench Force on Table 2. Place one cursor on the peak muscle force and move the other cursor on the top the first one to get function 0.000. Then, move the second cursor until you see the V2-V1 equals (can be approximate) to 50% of Max Clench Force. Record the time, T2-T1 at that point as Half-Max Fatigue Time on Table 2
2b%20Grip%20Strength%20Handout.docx