Electromyography Lab Report
“Electromyography in the Abductor Pollicis Brevis, Bicep, and Tricep Muscles of a Human”. July 6, 2015. PCB 3713L- General Physiology Lab, Section #001
Introduction
Skeletal muscles are responsible for most of the locomotion seen in humans and animals. Electromyography can be used to measure the electrical activity emitted from the muscle and nerves that control the muscle. This electrical activity is seen when a neuron ignites an action potential that activates the muscle fibers that were innervated by the motor neuron. This study aimed to view how the muscles electrical activity changed with voluntary contractions, and evoked stimulation of the abductor pollicis brevis muscle, and measure nerve conduction velocity and the affect of coactivation. Research in the use of electromyography is important for helping those with impaired muscle …show more content…
To start, the electrodes were placed so that the ground electrode is attached to a wristband and placed on the wrist of the arm being observed, and then the two cathodes were placed on both the bicep and trice muscles, and then two anodes were placed a few centimeters below those cathodes. Then the volunteer created alternating bicep and tricep. Then the muscles activity was recorded as the volunteer held their arm out at a 90° angle and one at a time a book was place in the hand of the arm being observed, until four books were piled on the hand. Next, a cathode and anode were removed, and the other pair were placed so that the cathode was on the middle segment of the thumb, and the anode was on the base of the thumb, trying to surround the abductor pollicis brevis muscle. Then a stimulating bar electrode was placed over the median nerve at the wrist and just above the bend in the elbow, and 20 milliAmps (mA) were administered to acquire the
Introduction
Skeletal muscles are responsible for most of the locomotion seen in humans and animals. Electromyography can be used to measure the electrical activity emitted from the muscle and nerves that control the muscle. This electrical activity is seen when a neuron ignites an action potential that activates the muscle fibers that were innervated by the motor neuron. This study aimed to view how the muscles electrical activity changed with voluntary contractions, and evoked stimulation of the abductor pollicis brevis muscle, and measure nerve conduction velocity and the affect of coactivation. Research in the use of electromyography is important for helping those with impaired muscle …show more content…
To start, the electrodes were placed so that the ground electrode is attached to a wristband and placed on the wrist of the arm being observed, and then the two cathodes were placed on both the bicep and trice muscles, and then two anodes were placed a few centimeters below those cathodes. Then the volunteer created alternating bicep and tricep. Then the muscles activity was recorded as the volunteer held their arm out at a 90° angle and one at a time a book was place in the hand of the arm being observed, until four books were piled on the hand. Next, a cathode and anode were removed, and the other pair were placed so that the cathode was on the middle segment of the thumb, and the anode was on the base of the thumb, trying to surround the abductor pollicis brevis muscle. Then a stimulating bar electrode was placed over the median nerve at the wrist and just above the bend in the elbow, and 20 milliAmps (mA) were administered to acquire the