| musculus palmaris brevis | <anatomy, muscle> Origin, ulnar side of central portion of the palmar aponeurosis; insertion, skin of ulnar side of hand; action, wrinkles skin on medial side of palm; nerve supply, ulnar. Synonym: musculus palmaris brevis, short palmar muscle. (05 Mar 2000) |
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| musculus papillaris | <anatomy> Small muscles within the heart which anchor the heart valves. (12 Dec 1998) |
| musculus pectineus | <anatomy, muscle> Origin, crest of pubis; insertion, pectineal line of femur; action, adducts thigh and assists in flexion; nerve supply, obturator and femoral. Synonym: musculus pectineus, pectineal muscle. (05 Mar 2000) |
| musculus pectoralis major | <anatomy, muscle> Origin, clavicular part (pars clavicularis), medial half of clavicle; sternocostal part (pars sternocostalis), anterior surface of manubrium and body of sternum and cartilages of first to sixth ribs; abdominal part (pars abdominalis), aponeurosis of external oblique; insertion, crest of greater tubercle of humerus; action, adducts and medially rotates arm; nerve supply, anterior thoracic. Synonym: musculus pectoralis major, greater pectoral muscle. (05 Mar 2000) |
| musculus pectoralis minor | <anatomy, muscle> Origin, third to fifth ribs at the costochondral articulations; insertion, tip of coracoid process of scapula; action, draws down scapula or raises ribs; nerve supply, medial pectoral nerve. Synonym: musculus pectoralis minor, smaller pectoral muscle. (05 Mar 2000) |
| musculus peroneocalcaneus | An occasional muscle arising from the shaft of the fibula and inserted into the calcaneus. (05 Mar 2000) |
| musculus petropharyngeus | An occasional accessory levator muscle of the pharynx, arising from the undersurface of the petrous portion of the temporal bone and inserted into the pharynx. (05 Mar 2000) |
| musculus petrostaphylinus | <anatomy, muscle> Origin, apex of petrous portion of temporal bone and lower part of cartilaginous auditory (eustachian) tube; insertion, aponeurosis of soft palate; action, raises soft palate; through the expansion of its fleshy belly during contraction, it helps to "push" open the auditory tube; nerve supply, pharyngeal plexus (cranial root of accessory nerve). Synonym: musculus levator veli palatini, elevator muscle of soft palate, levator palati muscle, musculus levator palati, musculus petrostaphylinus. (05 Mar 2000) |
| musculus pharyngopalatinus | <anatomy, muscle> Origin, soft palate; forms the posterior pillar of the fauces or tonsillar fossa; insertion, posterior border of thyroid cartilage and aponeurosis of pharynx; action, narrows fauces, depresses soft palate, elevates pharynx and larynx; nerve supply, pharyngeal plexus (cranial root of accessory nerve). Synonym: musculus palatopharyngeus, musculus pharyngopalatinus, palatopharyngeal muscle, palatopharyngeus, pharyngopalatinus, pharyngostaphylinus. (05 Mar 2000) |
| musculus piriformis | <anatomy, muscle> Origin, margins of pelvic sacral foramina and greater sciatic notch of ilium; insertion, upper border of greater trochanter; action, rotates thigh laterally; nerve supply, nerve to piriformis (sciatic plexus). Synonym: musculus piriformis, musculus pyriformis, piriform muscle. (05 Mar 2000) |
| musculus plantaris | <anatomy, muscle> Origin, lateral supracondylar ridge; insertion, medial margin of tendo achillis and deep fascia of ankle; action, traditionally described as plantar flexion of foot; many investigators now believe the plantaris muscle to be primarily a proprioceptive organ; nerve supply, tibial nerve. Synonym: musculus plantaris, musculus tibialis gracilis, plantar muscle. (05 Mar 2000) |
| musculus platysma | <anatomy, muscle> Origin, subcutaneous layer and fascia covering pectoralis major and deltoid at level of first or second rib; insertion, lower border of mandible, risorius and platysma of opposite side; action, depresses lower lip, forms ridges in skin of neck and upper chest when jaws are "clenched", denoting stress, anger; nerve supply, cervical branch of facial. Synonym: platysma, musculus platysma myoides, musculus platysma, musculus subcutaneus colli, musculus tetragonus. (05 Mar 2000) |
| musculus platysma myoides | <anatomy, muscle> Origin, subcutaneous layer and fascia covering pectoralis major and deltoid at level of first or second rib; insertion, lower border of mandible, risorius and platysma of opposite side; action, depresses lower lip, forms ridges in skin of neck and upper chest when jaws are "clenched", denoting stress, anger; nerve supply, cervical branch of facial. Synonym: platysma, musculus platysma myoides, musculus platysma, musculus subcutaneus colli, musculus tetragonus. (05 Mar 2000) |
| musculus pleuroesophageus | <anatomy> Muscular fasciculi, arising from the mediastinal pleura, which reinforce musculature of oesophagus. Synonym: musculus pleuroesophageus. (05 Mar 2000) |
| musculus popliteus | <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 |