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S01 EMG 1 Motor Unit Recruitment

This lesson is for existing Biopac Science Lab (MP40) System users. The Biopac Science Lab secondary education product line has been discontinued; see Biopac Student Lab Systems with 1-channel, 2-channel, and 4-channel options.
EMG 1 investigates the properties of skeletal muscle. Students record the EMG data associated with the maximum clench strength for their dominant hand and non-dominant hand. The system records and displays both the raw and integrated EMG signals. Students compare clench strength 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

  1. To record maximum clench strength for right and left hands.
  2. To observe, record, and correlate motor unit recruitment with increased power of skeletal muscle contraction
  3. Optional: To listen to EMG sounds and correlate sound intensity with motor unit recruitment.

Tasks Performed by the Student

Videos

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Student Prep & Distance Learning

Click the link(s) below for sample data and/or lesson procedure video(s), BSL PRO Lesson procedures (PDF) for human lessons*, and graph template files (*.gtl) for BSL PRO Lessons. If more than one .gtl is available, download the .gtl with the _suffix to match BSL version and hardware.

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HRV | Ultra-Short-Term & Short-Term

In this webinar, we will demonstrate recording of high-quality ECG data as well as preparing data for analysis through UST HRV measurements during acute stress, Valsalva maneuver and paced breathing.

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– Physiological basis of HRV
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– Recording good quality ECG & preparing data for analysis
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– Automation with scripting and workflow

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