ELECTROMYOGRAPHY II Motor unit recruitment and Fatigue DATA REPORT Student\'s Na

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ELECTROMYOGRAPHY II Motor unit recruitment and Fatigue DATA REPORT Student's Name: Lab Section: Subject Profile Height Weight Gender: Male Female Dominant forearm: Right/Left I. Data and Calculations Motor Unit Recruitment A. Complete Table 2.1 using Dominant forearm and Non-dominant forearm data. In the "Force (kg) Increments column, note the force increment assigned for your recording under Peak #1: the increment was pasted to the ournal and should be noted below from Data Analysis Step 2. For subsequent peaks, add the increment (i.e., 500 1000, 1500). You may not need eight peaks to reach max. Take measurements on plateaus of the Integrated EMG data. Table 2.1 Increasing Clench Force Data Assigned (Dominant forearm) (Non-dominant forearm) Peak Force Increment Force at Peak Integrated EMG Force at PeakIntegrated EMG mV) 16.asando-algqwL5.375KaleAH54 w-s Fatigue B. Complete Table 2.2 using Dominant forearm and Non-dominant forearm data. Table 2.2 Maximum Clench Force Data (Dominant forearm) (Non-dominant forearm) 50% of Max Time" to 50% of Max Time" to Maximum Clench Force Clench Force Fatigue Maximum Clench Force Clench force fatigue DetaT1-Value 1 | | | 6.a6 calculate calculate 50 D422 | 20.3 2K62 | 13:2 Note: You do not need to indicate the Delta T (time to fatigue) polarity. The polarity of the Delta T measurement reflects the direction the 7-beam cursor was dragged to select the data. Data selected left to right will have a positive) polarity, while data selected right to left will have a negative ) polarity

Explanation / Answer

LESSON 2

QUESTION D

QUESTION E

When holding an object, does the number of motor units remain the same - YES .The same motor units are used because continuously holding an object in the same position requires those same motor units.

Are the same motor units used for the duration of holding the object - No,motor units are cycled to provide consistency and lessen the rate of fatigue

QUESTION F

As you fatigue, the force exerted by your muscles decreases. What physiological processes explain the decline in strength?

Central fatigue because that's caused by changes in the CNS which results in a decrease of muscle strength

QUESTION G

Motor Unit- Combination of a single motor neuron and all of the muscle fibers it controls/stimulates

QUESTION H

Motor unit recruitment refers to the activation of additional motor units to accomplish an increase in contractile strength in a muscle.

QUESTION I

FATIGUE is decrease in muscle's ability to generate force because there is no ATP left

QUESTION J

Electromyography (EMG) is a diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons).

QUESTION K

DYANOMETRY -The process of obtaining quantifiable measurements of muscular strength, power

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