Electromyography

Electromyography (EMG) is a diagnostic procedure to detect the muscle’s membrane depolarization. It can be used to determine the functions of different muscles during different movements. For this study, the question is which movements associate with large burst of the deltoid, shoulder muscle, activity. I hypothesis that shoulder abduction, when the palm is down, would produce high level of the deltoid activation, the highest amplitude of EMG. The subject performed four different movements with 3 different weights (1.8kg, 2.94kg, 4.08 kg) for each movement and were tested on the deltoid activity by EMG recording. The EMG amplitude was the highest when the arm was fully extended, shoulder abducted, and the palm was up and it was not significantly…

The electromyography (EMG) has the capacity of many uses in the clinical setting for gait analysis in the diagnosis of neural muscular disorders such as cerebral palsy. This method was chosen in our experiment to record and examine the electrical activity of the skeletal muscle during gait movement during treadmill and over ground walking. In our experiment we specifically looked at the lower extremity with overactive quadriceps and underactive. Common to use to EMG to identify precisely…

INTRODUCTION: An individual’s level of strength is not only dependent upon on the muscles involved in an action but also the nervous systems ability to activate the appropriate muscles at any one time. It is well known that resistance training can lead to an increase in maximal contractile muscle force (Aagaard et al., 2002) however; this adaptation is not primarily explained by an increase in muscle volume or muscle cross-sectional area but adaptive changes within the nervous system.…

There are a multitude of different "specific characteristics" for muscular dystrophy. This is because the disease is made up of a multitude of other diseases (roughly 30) that can start as early as childhood. Some will loose the ability to breath or swallow, while others won't be able to walk, however all of those affected by muscular dystrophy will be losing or have weakened muscle mass. The cause of Muscular Dystrophy comes from a defective gene that is most likely inherited but sometimes can…

Electromyography is a procedure that assesses the muscles and the motor neurons that control them. The motor neurons that control the muscles transmit electrical signals that cause the muscles to contract. A thin needle with an electrode on the end will be place through the skin into the muscle. The electrode picks up the electrical signal from the muscle. The patient will be asked to use the muscle by contracting a muscle or by bending the arm. EMG measures the electrical activity of muscle…

During lab on Tuesday October 20, we experimented with the electromyography. An electromyography, or EMG, is a diagnostic procedure to assess the health of muscles and the nerve cells that control them (Mayo Clinic). An EMG uses tiny devices called electrodes to transmit or detect electrical signals. EMG results can reveal nerve dysfunction, muscle dysfunction or problems with nerve to muscle signal transmissions. According to the U.S. National Library of Medicine, the introduction of the EMG…

TITLE: Electromyography (EMG) Lab: Understanding Motor Unit Recruitment INTRODUCTION: The objective of this lab is to better understand muscle contraction and the effect it has on motor unit recruitment. This lab was done in three sections, or phases, to help understand the process of muscle contraction. Phase 1 consisted of the usage of the electromyogram to measure varied levels of force that was generated by the muscle, the frequency, and the number of motor units recruited at different…

digestive enzymes and four bilateral muscles accompany the bolus. These muscles comprise of the Temporalis, Lateral Pterygoid, Medial Pterygoid and the Masseter. Thereby, they conjoin into a single composed division of a nerve, which elevates, retracts, and protracts the lower jaw to or fro the neutral position. Correspondingly, they assist in the side-to-side movement within the jaw. Though, the Masseter muscle is proven to be the utmost significance in chewing as it elevates the mandible (the…

Abstract Muscular Dystrophy may seem like a well known disease but in all actuality it isn't. There are three types of Muscular Dystrophy; Duchenne Muscular Dystrophy, Becker Muscular Dystrophy, and Myotonic Muscular Dystrophy (Myotonic is then broken down into two other subcategories). Although each may be similar in some ways they are also completely different and each has their own level of severity. Treatments and outcomes stay rather similar but the symptoms and signs may differ quite a…

The protein that was concluded was dystrophin. The disease that is associated with this protein is Duchenne. Duchenne is referred to as DMD and is associated with muscular dystrophy. DMD is one of the most common gene malfunctions and is causes by having a problem with a gene which makes up the dystrophin protein. Gupta (2014) explained that when the protein is functioning properly, muscle cells are able to keep their shape and strength, but without it they can begin to break down and become…