| aryepiglottic muscle | <anatomy> The fibres of the oblique arytenoid muscle that extend from the summit of the arytenoid cartilage to the side of the epiglottis; action, constricts the laryngeal aperture. Synonym: musculus aryepiglotticus. (05 Mar 2000) |
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| axial muscle | <anatomy> One of the skeletal muscle's of the trunk or head. (05 Mar 2000) |
| axillary arch muscle | <anatomy> An anomalous muscle or tendinus slip that passes across the axilla from the pectoralis major to insert with the latissimus dorsi onto the humerus. Though to be a vestige of the panniculus carnosus muscle of lower mammals. Synonym: axillary arch muscle, axillary arch, pectorodorsal muscle. (05 Mar 2000) |
| bellies of digastric muscle | <anatomy> See: anterior belly of digastric muscle, posterior belly of digastric muscle. (05 Mar 2000) |
| bellies of omohyoid muscle | <anatomy> See: inferior belly of omohyoid muscle, superior belly of omohyoid muscle. (05 Mar 2000) |
| Bell's muscle | <anatomy> A band of muscular fibres, forming a slight fold in the wall of the bladder, running from the uvula to the opening of the ureter on either side, bounding the trigonum. (05 Mar 2000) |
| biceps muscle of arm | <anatomy, muscle> Origin, long head from supraglenoidal tuberosity of scapula, short head from coracoid process; insertion, tuberosity of radius; action, flexes and supinates forearm (it is the primary supinator of the forearm); nerve supply, musculocutaneous. Synonym: musculus biceps brachii, biceps muscle of arm. (05 Mar 2000) |
| biceps muscle of thigh | <anatomy, muscle> Origin, long head (caput longum) from tuberosity of ischium, short head (caput breve) from lower half of lateral lip of linea aspera; insertion, head of fibula; action, flexes knee and rotates leg laterally; nerve supply, long head, tibial, short head, peroneal. Synonym: musculus biceps femoris, biceps muscle of thigh, musculus biceps flexor cruris. (05 Mar 2000) |
| biopsy, muscle | <investigation, procedure, surgery> A procedure which involves the removal of a small specimen of muscle tissue for microscopic analysis. A muscle biopsy is used to distinguish between neurological and myopathic (muscle disease) disorders, identify muscular dystrophy, diagnose muscle infections and identify connective tissue disorders (necrotising vasculitis). (21 Mar 1998) |
| bipennate muscle | <anatomy> A muscle with a central tendon toward which the fibres converge on either side like the barbs of a feather. Synonym: musculus bipennatus. (05 Mar 2000) |
| Bochdalek's muscle | An occasional thin band of muscular fibres passing between the root of the tongue and the triticeal cartilage. Synonym: Bochdalek's muscle. (05 Mar 2000) |
| Bovero's 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) |
| Bowman's muscle | <anatomy> The smooth muscle of the ciliary body; it consists of circular fibres (Muller's muscle) and radiating fibres (meridional fibres, or Brucke's muscle); action, in contracting, its diameter is reduced (like a sphincter), reducing tensile (stretching) forces on lens, allowing it to thicken for near vision (accommodation). Synonym: musculus ciliaris, Bowman's muscle, ciliary ligament. (05 Mar 2000) |
| brachial muscle | <anatomy, muscle> Origin, lower two-thirds of anterior surface of humerus; insertion, coronoid process of ulna; action, flexes elbow; nerve supply, musculocutaneous, usually with a minor contribution from the radial. Synonym: musculus brachialis, brachial muscle. (05 Mar 2000) |
| brachiocephalic muscle | In animals, a compound muscle passing from the brachium or humerus to the head and the dorsal cervical raphe; the clavicular insertion or clavicle subdivides the muscle. Synonym: brachiocephalic muscle. (05 Mar 2000) |