evaluation of the electrical activity of resting or contracting muscle to find the causes of muscular weakness, paralysis, involuntary twitching, & abnormal levels of muscle enzymes; also used as part of biofeedback studies
A diagnostic test that records the electrical responses of skeletal muscles while at rest and during voluntary action and electrical stimulation. During this test, a small needle is inserted into a muscle to record the level of activity.
Commonly known as an EMG, a test where muscle function is recorded and then studied. The electrical impulses are picked up by electrodes placed on the skin and amplified on a screen in the form of wavelike tracings.
The recording and study of skeletal muscle activity, specifically the external sphincter and perineal floor musculature, by means of surface or needle electrodes to determine whether the muscle is contracting.
Procedure in which a monopolar needle electrode is introduced into the muscle to be tested, with a surface electrode acting as the reference. The purpose is to record electrical activities of the muscle fibers.
Technique in which surface electrodes are applied to the skin over muscles that the user can voluntarily control. Electrical activity detected by the electrodes can be interpreted and used to control switch activation.
A test used to determine the function of the peripheral nerves and nerve roots, involving placement of tiny needles in muscles and provding an electrical stimulus that can be monitored for changes that reflect the function of the connection between the nerve and muscle. This test is usually performed in conjunction with a nerve conduction velocity study (NCV) .
A test which measures muscle response to nerve stimulation. Used to evaluate muscle weakness and to determine if the weakness is related to the muscles themselves or a problem with the nerves that supply the muscles.
This is a diagnostic test for many types of neuromuscular disorders. It involves insertion of a small needle into several muscles to obtain information about the severity and the cause of weakness. It is usually combined with nerve conduction studies (NCS) which allow direct measurement of the integrity of various motor and sensory nerves. The skin overlying certain nerves is electrically stimulated and the response is measured over skin or muscle. You can read more about electromyography and nerve conduction velocities here.
electrical test to determine nerve or muscle damage. erythrocyte sedimentation rate (ESR) - a measurement of how quickly red blood cells fall to the bottom of a test tube. When swelling and inflammation are present, the blood's proteins clump together and become heavier than normal. Thus, when measured, they fall and settle faster at the bottom of the test tube. Generally, the faster the blood cells fall, the more severe the inflammation.
The recording and study of the intrinsic electrical properties of skeletal muscle by means of surface or needle electrodes to determine whether the muscle is contracting or not, or by inserting a needle electrode into the muscle and observing, by cathode-ray oscilloscope and loud-speaker, the action potentials present in a muscle or induced by voluntary contractions.
Electromyography is the recording of electrical currents generated in an active muscle using an instrument called an electromyogram (EMG). EMG recordings can be used to ascertain causes of muscular weakness, paralysis, involuntary twitching, and abnormal levels of muscle enzymes; EMGs can also be used as part of biofeedback studies.
An examination of the electrical activity of a motor unit, useful in determining the site of injury in a peripheral nerve and in detecting spinal nerve root lesions as well as primary muscle diseases. Needle EMG involves the insertion of needle electrodes into muscle; surface EMG uses surface electrodes instead of needle insertion.
a special recording technique that detects electric activity in muscle. Patients are sometimes offered a type of biofeedback called EMG training, in which they learn to control muscle tension in the face, neck, and shoulders.
Electromyography (EMG) is a medical technique for evaluating and recording physiologic properties of muscles at rest and while contracting. EMG is performed using an instrument called an electromyograph, to produce a record called an electromyogram. An electromyograph detects the electrical potential generated by muscle cells when these cells contract, and also when the cells are at rest.