BIOPAC® Systems, Inc. Logo

L02 Electromyography II

Motor Unit Recruitment and Fatigue

BSL EMG lesson II explores the role of skeletal muscle in performing mechanical tasks. The lesson uses a hand dynamometer to demonstrate the use of skeletal muscle when recording the maximum grip strength for both hands and also allows students to record EMG while inducing muscle fatigue. The system will automatically calibrate the hand dynamometer and scale the force values to kilograms for the electromyogram. Students will see the level of motor unit recruitment associated with the precise amount of applied force.

Experimental Objectives

  1. To determine the maximum grip strength for the right versus the left hands and compare the differences between male and female.
  2. To observe, record and correlate motor unit recruitment with the increased power of skeletal muscle contraction.
  3. To record the force produced by grip muscles, EMG, and integrated EMG when inducing fatigue.

Tasks Performed by the Student

BSL Lessons are designed to allow at least four students to record and save data in a normal lab period (60-90 minutes). Typically, labs work most efficiently with three or more students working together at each BSL station.

Videos

BSL L02 Cal SS25L

BSL L02 Cal SS25LA

Biopac Student Lab Student Download

Lesson Hardware

This lesson requires a Biopac Student Lab (BSL) System and the following hardware. If your BSL System does not include all hardware items, expand your system by selecting required items below. For more details, review the Lesson: L# BSL Lessons - see the Lab Manual or launch BSL; A# and H# BSL PRO Lessons, click the PDF link above to review full setup, recording, and analysis procedures.

ItemNameCart
Select OptionHand Dynamometer - MP3XAdd to Cart
SS2LBLead set, shielded, BSLAdd to Cart
EL503Disp. Gen-purp electrode 100/pkAdd to Cart
GEL1Electrode gel 50 gAdd to Cart
ELPADAbrasive Pads 10/pkAdd to Cart
Spotlight On
NIBP100E Amplifier ships with 3 finger cuffs

Noninvasive Blood Pressure Amplifier

The NIBP100E noninvasive blood pressure system provides continuous, beat‐to‐beat, blood pressure signal and values (Sys, Dia, MAP) and Pulse Rate (PR)*.  The NIBP100E amplifier with CNAP™ technology is controlled by AcqKnowledge software (v5.0.7) for MP160 Research Systems. The system outputs a continuous blood pressure waveform that is similar to a direct arterial pressure waveform. The amplifier […]

View All
Latest News

New Citations | Physiological Measures to Understand Stress

BIOPAC provides software and hardware that allows research teams to study physiological measures related to stress. Here are a few notable studies using BIOPAC equipment for ECG, EDA, and EEG/ERP. Moms Moderating Stress Can relaxation techniques help lower stress on both mother and fetus? Using an MP36R Data Acquisition system to record ECG and EDA, this study […]

Electrocardiography Guide Now Available

BIOPAC’s comprehensive Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines for extracting, […]

Read All
Request a Demonstration
Request a Demonstration