EMG lesson I investigates the properties of skeletal muscle. Students record the EMG data associated with the maximum grip clench for their dominant hand and then do the same for their non-dominant hand. The system will record and display both the raw and integrated EMG signals. This lesson allows the students to compare the grip clench between their two arms and listen to the sound of their EMG. It is also possible for students to perform a cross group analysis.
EXPERIMENTAL OBJECTIVES
To observe and record skeletal muscle tonus as reflected by a basal level of electrical activity associated with the muscle in the resting state.
To record the maximum grip clench for the right and the left hand.
To observe, record and correlate motor unit recruitment with the increased power of skeletal muscle contraction.
To listen to EMG "sounds" and correlate sound intensity with motor unit recruitment.
TASKS PERFORMED BY THE STUDENT
Record EMG from the dominant and non-dominant forearms.
Clench their fist four times, increasing the grip each time to reach the maximum grip strength with the fourth clench.
Listen to the sound of their EMG.
KEY FEATURES
Raw and Integrated EMG signals can be overlapped for easy interpretation of the data.
Comparison between the dominant and non-dominant arms.
The students listen to the sound of motor unit recruitment.
Add event markers throughout the recording.
The software automates the calibration procedure for the student. There are no knobs and dials to confuse the student.
On-screen commands prompt the student throughout the lesson.
BIOPAC's Simple Sensors warn students if they plug the wrong device or transducer into the system.
The lesson will also work as part of a group study. and Windows Media Player. Data files must be opened in BSL Review Saved Data mode.
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