| MRT | magnetic resonance tomography; maximum relaxation time; median range score; median reaction time; me... |
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| MSA | major serologic antigen; male-specific antigen; mannitol salt agar; Medical Services Administration;... |
| MSE | medical support equipment; mental status examination; muscle-specific enolase |
| msp | muscle spasm |
| MSR | macrophage scavenger receptor; Member of the Society of Radiographers; monosynaptic reflex; muscle s... |
| cowl muscle | <anatomy, muscle> Origin, medial third of superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of seventh cervical and the thoracic vertebrae and corresponding supraspinous ligaments; insertion, lateral third of posterior surface of clavicle, anterior side of acromion, and upper and medial border of the spine of the scapula; action, when scapulae are fixed, portions of muscle can act independently: cervical portion elevates scapula, thoracic portion contributes to depression of scapula; upper and lowermost portions act simultaneously to rotate glenoid fossa superiorly; when the entire muscle and especially middle part contracts, the scapulae retract; draws head to one side or backward; nerve supply, motor by accessory, sensory by cervical plexus. Synonym: musculus trapezius, cowl muscle, trapezius. (05 Mar 2000) |
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| Crampton's muscle | <anatomy> The part of the ciliary muscle formed by the meridional fibres. Synonym: Crampton's muscle. (05 Mar 2000) |
| popliteal muscle | <anatomy, muscle> Origin, lateral condyle of femur; insertion, posterior surface of tibia above oblique line; action, from the fully extended and "locked" position, rotates the femur medially, on the fixed (planted) tibial plateau about 5 |
| cricopharyngeus muscle | <anatomy, muscle> This is the horizontal muscle located at the top of the oesophagus. (13 Nov 1997) |
| posterior auricular muscle | <anatomy, muscle> Origin, mastoid process; insertion, posterior portion of root of auricle; action, draws back the pinna; nerve supply, facial. Synonym: musculus auricularis posterior, musculus retrahens aurem, musculus retrahens auriculam. (05 Mar 2000) |
| posterior belly of digastric muscle | <anatomy> Portion of digastric muscle posterior to the intermediate tendon, attaching to the digastric groove of the temporal bone. Synonym: venter posterior musculi digastrici. (05 Mar 2000) |
| posterior cricoarytenoid muscle | <anatomy, muscle> Origin, depression on posterior surface of lamina of cricoid; insertion, muscular process of arytenoid; action, abducts vocal folds, widening rima glottidis as for taking a breath; nerve supply, recurrent laryngeal. Synonym: musculus cricoarytenoideus posterior. (05 Mar 2000) |
| cruciate muscle | <anatomy> A general type of muscle in which the muscles or bundles of muscle fibres cross in an X-shaped configuration; e.g., the oblique arytenoid muscles. Synonym: musculus cruciatus. (05 Mar 2000) |
| posterior scalene muscle | <anatomy, muscle> Origin, posterior tubercles of transverse processes of fourth to sixth cervical vertebrae; insertion, lateral surface of second rib; action, elevates second rib; nerve supply, cervical and brachial plexuses. Synonym: musculus scalenus posterior, musculus scalenus posticus, posterior scalene muscle. (05 Mar 2000) |
| posterior tibial muscle | <anatomy, muscle> Origin, soleal line and posterior surface of tibia, the head and shaft of the fibula between the medial crest and interosseous border, and the posterior surface of interosseous membrane; insertion, navicular, three cuneiform, cuboid, and second, third, and fourth metatarsal bones; action, plantar flexion and inversion of foot; nerve supply, tibial. Synonym: musculus tibialis posterior, musculus tibialis posticus, posterior tibial muscle. (05 Mar 2000) |
| cutaneomucous muscle | <anatomy> The "sucking muscle," a labial muscle formed by sagittal fibres running from the skin to the mucous membrane. Synonym: Aeby's muscle, Bovero's muscle, compressor muscle of lips, Klein's muscle, Krause's muscle, mucocutaneous muscle, musculus cutaneomucosus. (05 Mar 2000) |
| Pozzi's muscle | extensor digitorum brevis muscle of hand |
| cutaneous muscle | <anatomy> A muscle that lies in the subcutaneous tissue and attaches to the skin; it may or may not have a bony attachment. The muscles of expression are the chief examples of cutaneous muscles in the human. Synonym: musculus cutaneus. (05 Mar 2000) |
| saemicanal for tensor tympani muscle | <anatomy> Saemicanal of the tensor muscle of the tympanum; the superior division of the canalis musculotubarius containing the tensor tympani muscle. Synonym: saemicanalis musculi tensoris tympani. (05 Mar 2000) |
| heart muscle | <anatomy> Tissue specialised for contraction. See twitch muscle, catch muscle: Cardiac muscle (heart muscle) is a striated but involuntary muscle responsible for the pumping activity of the vertebrate heart. The individual muscle cells are joined through a junctional complex known as the intercalated disc and are not fused together into multinucleate structures as they are in skeletal muscle. Skeletal muscle is a rather non-specific term usually applied to the striated muscle of vertebrates that is under voluntary control. The muscle fibres are syncytial and contain myofibrils, tandem arrays of sarcomeres. Smooth muscle is muscle tissue in vertebrates made up from long tapering cells that may be anything from 20-500m long. Smooth muscle is generally involuntary and differs from striated muscle in the much higher actin/myosin ratio, the absence of conspicuous sarcomeres and the ability to contract to a much smaller fraction of its resting length. Smooth muscle cells are found particularly in blood vessel walls, surrounding the intestine (especially the gizzard in birds) and in the uterus. The contractile system and its control resemble those of motile tissue cells (for example fibroblasts, leucocytes) and antibodies against smooth muscle myosin will cross react with myosin from tissue cells, whereas antibodies against skeletal muscle myosin will not. See: dense bodies. (18 Nov 1997) |