Common sites for IM injections include the following: 1. The ventrogluteal muscle is the preferred site for adults and children over the age of 1 year because there are no large nerves or vessels, it is a large muscle, it is sealed by bone and contains less fat (Berman et al., 2008). 2.
electromyogram (EMG). Recording of electrical activity of a muscle associated with contraction and relaxation. This is obtained by placing a microelectrode within a muscle.The recording process is called electro-myography. diagnostic test that records the electrical activity of muscles. In the test, small electrodes are placed on or in the skin; the patterns of electrical activity are projected on a screen or over a loudspeaker. This procedure is used to test for muscle disorders, including muscular dystrophy. Mentioned in: Myopathies.
The diaphragm is the prime mover of inspiration. It flattens on contraction, increasing the vertical dimensions of the thorax, which draws air into the lungs. The external int â¦ ercostals also contribute to inspiration. The internal intercostals and rectus abdominis are expiratory muscles.he increased volume of the thoracic cavity causes air to rush into the lungs. Exhalation occurs when the diaphragm and rib muscles relax, reducing the volume of the thoracic cavity. The expansion and contraction of the thoracic cavity occurs between 12 and 20 times each minute in adults.