| OA | obstructive apnea; occipital artery; occipito-anterior; occiput anterior; octanoic acid; ocular albi... |
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| OAK | Kjer optic atrophy |
| OCA | oculocutaneous albinism; olivopontocerebellar atrophy; oral contraceptive agent |
| OPCA | olivopontocerebellar atrophy |
| POA | pancreatic oncofetal antigen; phalangeal osteoarthritis; preoptic area; primary optic atrophy |
| muscular reflex | Tonic contraction of the muscles in response to a stretching force, due to stimulation of muscle proprioceptors. Synonym: Liddell-Sherrington reflex, muscular reflex, stretch reflex. (05 Mar 2000) |
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| muscular rheumatism | <pathology> A disorder characterised by muscle pain, stiffness and easy fatigability. The cause is unknown and an estimated 3 million Americans are affected. (27 Sep 1997) |
| muscular sense | The sensation felt in muscle when it is contracting; awareness of movement or activity in muscles or joints; sense of position or movement mediated in large part by the posterior columns and medial lemniscus. See: bathyesthesia. Synonym: deep sensibility, kinesthetic sense, mesoblastic sensibility, muscular sense, myoesthesis, myoesthesia. Origin: G. Mys, muscle, + aisthesis, sensation (05 Mar 2000) |
| muscular subaortic stenosis | <cardiology> A congenital heart disease that results in abnormal thickening of the ventricular septum and left ventricular wall. Enlargement of the ventricular septum can result in ventricular outflow obstruction (subaortic stenosis) and eventual cardiomyopathy. (27 Sep 1997) |
| muscular substance of prostate | The smooth muscle in the stroma of the prostate. Synonym: substantia muscularis prostatae, musculus prostaticus. (05 Mar 2000) |
| muscular system | All the muscles of the body collectively. (05 Mar 2000) |
| muscular tissue | A tissue characterised by the ability to contract upon stimulation; its three varieties are skeletal, cardiac, and smooth. See: muscle. Synonym: flesh. (05 Mar 2000) |
| muscular triangle | The triangle bounded by the sternocleidomastoid muscle, the superior belly of the omohyoid muscle, and the anterior midline of the neck; the infrahyoid muscles occupy most of it. Synonym: trigonum musculare, trigonum omotracheale, inferior carotid triangle, omotracheal triangle, tracheal triangle. (05 Mar 2000) |
| muscular trophoneurosis | A serious neurologic disease that results from the progressive degeneration of the motor neurons. (27 Sep 1997) |
| muscular tunic of gallbladder | Muscular tunic of the gallbladder, consisting of layers of smooth muscle fibres coursing in various directions immediately external to the mucosa of the gallbladder. (05 Mar 2000) |
| muscular tunics | See: muscular coat. (05 Mar 2000) |
| myopathic atrophy | Muscular atrophy caused by a primary disorder of muscle. (05 Mar 2000) |
| postmenopausal atrophy | Atrophy following menopause, as of the genital organs. (05 Mar 2000) |
| cyanotic atrophy | Atrophy due to destruction of the parenchymatous cells of an organ as a consequence of chronic venous congestion. Synonym: red atrophy. (05 Mar 2000) |
| cyanotic atrophy of the liver | A sequela of longstanding hepatic congestion due to high pressure in the right atrium as in chronic constrictive pericarditis and severe, protracted right ventricular failure. (05 Mar 2000) |