| IMT | indomethacin; induced muscular tension; inspiratory muscle training |
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| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
| ISM | information sources map [of UMLS]; International Society of Microbiologists; intersegmental muscle |
| LDM | lactate dehydrogenase, muscle; limited dorsal myeloschisis |
| LLD | left lateral decubitus [muscle]; leg length discrepancy; long-lasting depolarization |
| semispinal muscle of thorax | <anatomy, muscle> Origin, transverse processes of fifth to eleventh thoracic vertebrae; insertion, spinous processes of first four thoracic and fifth and seventh cervical vertebrae; action, extends vertebral column; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves. Synonym: musculus semispinalis thoracis, musculus semispinalis dorsi, semispinal muscle of thorax. (05 Mar 2000) |
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| Horner's muscle | <anatomy> See: orbicularis oculi muscle. Synonym: pars lacrimalis musculi orbicularis oculi, Duverney's muscle, Horner's muscle, musculus tensor tarsi. (05 Mar 2000) |
| Houston's muscle | A variation of the bulbospongiosus muscle in which some fibres pass dorsal to the dorsal vein of the penis; thought at one time to be an important component in the mechanism of erection. Synonym: Houston's muscle. (05 Mar 2000) |
| pyramidal auricular muscle | <anatomy> An occasional prolongation of the fibres of the tragicus to the spina helicis. Synonym: musculus pyramidalis auriculae, Jung's muscle, pyramidal muscle of auricle. (05 Mar 2000) |
| pyramidal muscle | <anatomy, muscle> Origin, crest of pubis; insertion, lower portion of linea alba; action, makes linea alba tense; nerve supply, subcostal. Synonym: musculus pyramidalis, pyramidal muscle. (05 Mar 2000) |
| pyramidal muscle of auricle | <anatomy> An occasional prolongation of the fibres of the tragicus to the spina helicis. Synonym: musculus pyramidalis auriculae, Jung's muscle, pyramidal muscle of auricle. (05 Mar 2000) |
| humeroulnar head of flexor digitorum superficialis muscle | <anatomy> The head of the superficial flexor of the digits that attaches to both the humerus and the ulna. Synonym: caput humeroulnare musculi flexoris digitorum superificialis. (05 Mar 2000) |
| serratus posterior superior muscle | <anatomy> Origin, from spinous processes of two lower cervical and two upper thoracic vertebrae; insertion, into lateral side of angles of second to fifth ribs; nerve supply, first to fourth intercostals. Synonym: musculus serratus posterior superior, superior posterior serratus muscle. (05 Mar 2000) |
| shawl muscle | <anatomy> An obsolete term for trapezius muscle. (05 Mar 2000) |
| short abductor muscle of thumb | <anatomy, muscle> Origin, tubercle of trapezium and flexor retinaculum; insertion, lateral side of proximal phalanx of thumb; action, abducts thumb; nerve supply, median. Synonym: musculus abductor pollicis brevis, short abductor muscle of thumb. (05 Mar 2000) |
| short adductor muscle | <anatomy, muscle> Origin, superior ramus of pubis; insertion, upper third of medial lip of linea aspera; action, adducts thigh; nerve supply, obturator. Synonym: musculus adductor brevis, short adductor muscle. (05 Mar 2000) |
| short extensor muscle of great toe | <anatomy, muscle> The medial belly of extensor digitorum brevis musculus, the tendon of which is inserted into the base of the proximal phalanx of the great toe. Synonym: musculus extensor hallucis brevis, short extensor muscle of great toe. (05 Mar 2000) |
| short extensor muscle of thumb | <anatomy, muscle> Origin, dorsal surface of radius; insertion, base of proximal phalanx of thumb; action, extends and abducts the thumb; nerve supply, radial. Synonym: musculus extensor pollicis brevis, musculus extensor brevis pollicis, short extensor muscle of thumb. (05 Mar 2000) |
| short extensor muscle of toes | 1. <anatomy, muscle> (foot) Origin, dorsal surface of calcaneus; insertion, by four tendons fusing with those of the extensor digitorum longus, and by a slip attached independently to the base of the proximal phalanx of the great toe; action, extends toes; nerve supply, deep peroneal. Synonym: musculus extensor digitorum brevis, musculus extensor brevis digitorum, short extensor muscle of toes. 2. (hand) A short extensor muscle of the fingers of rare occurrence, and comparable to the short extensor of the toes. Synonym: musculus extensor digitorum brevis manus, Pozzi's muscle. (05 Mar 2000) |
| short fibular muscle | <anatomy, muscle> Origin, lower two-thirds of lateral surface of fibula; insertion, base of fifth metatarsal bone; action, everts foot; nerve supply, superficial peroneal. Synonym: musculus fibularis brevis, musculus peroneus brevis, short fibular muscle, short peroneal muscle. (05 Mar 2000) |