| biofeedback | <procedure> A process in which a person learns to influence reliably physiologic responses of two kinds: those that are not ordinarily under voluntary control or those that ordinarily are easily regulated but for which regulation has broken down because of trauma or disease. <psychology> A process that uses instrumentation to give a person immediate and continuing signals of change in his bodily function of which he is usually unaware. (12 Dec 1998) |
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| EMG | <investigation> 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. Abnormal results may be seen in myasthenia gravis, polymyositis, carpal tunnel syndrome, amyotrophic lateral sclerosis, alcoholic neuropathy, cervical spondylosis, dermatomyositis, familial periodic paralysis, Guillain-Barre syndrome, Lambert-Eaton syndrome, Friedreich's ataxia, mononeuritis multiplex, peripheral neuropathy, sciatic nerve disease and a variety of peripheral nerve disorders. Acronym: EMG (19 Jan 1998) |
| EMG examination | Needle electrode examination portion of the electrodiagnostic examination (limited sense), synonym for entire electrodiagnostic examination, including not only the needle electrode examination (electromyogram proper), but the nerve conduction studies as well (expanded sense). (05 Mar 2000) |
| EMG syndrome | <syndrome> This syndrome, of unknown cause, is characterised by a group of the following findings: large tongue, organ enlargement (visceromegaly), large body size, umbilical hernia and neonatal hypoglycaemia. Evidence suggests a genetic lesion. Birth weight is often more than 8 pounds. Complications include Wilm's tumour, seizures, aspiration and hypoglycaemia. (27 Sep 1997) |