| posterior cervical intertransversarii muscles | Origin, lateral part: posterior tubercle of cervical transverse process; medial part: transverse process; insertion, corresponding parts of next superior transverse process; action, abducts cervical vertebrae; nerve supply, lateral part: ventral primary rami of cervical spinal nerves; medial part: dorsal primary rami of cervical spinal nerves. Synonym: musculi intertransversarii posteriores cervicis, posterior cervical intertransverse muscles. (05 Mar 2000) |
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| posterior cervical intertransverse muscles | Origin, lateral part: posterior tubercle of cervical transverse process; medial part: transverse process; insertion, corresponding parts of next superior transverse process; action, abducts cervical vertebrae; nerve supply, lateral part: ventral primary rami of cervical spinal nerves; medial part: dorsal primary rami of cervical spinal nerves. Synonym: musculi intertransversarii posteriores cervicis, posterior cervical intertransverse muscles. (05 Mar 2000) |
| psoas muscles | A powerful flexor of the thigh at the hip joint (psoas major) and a weak flexor of the trunk and lumbar spinal column (psoas minor). Psoas is derived from the greek "psoa", the plural meaning "muscles of the loin". It is a common site of infection manifesting as abscess (psoas abscess). The psoas muscles and their fibres are also used frequently in experiments in muscle physiology. (12 Dec 1998) |
| pterygoid muscles | Two of the masticatory muscles: the internal, or medial, pterygoid muscle and external, or lateral, pterygoid muscle. Action of the former is closing the jaws and that of the latter is opening the jaws, protruding the mandible, and moving the mandible from side to side. (12 Dec 1998) |
| short levatores costarum muscles | Origin, the transverse processes of last cervical and eleven thoracic vertebrae; insertion ribs immediately below, between angle and tubercle. Synonym: musculi levatores costarum breves. (05 Mar 2000) |
| neck muscles | The neck muscles consist of the platysma, splenius cervicis, sternocleidomastoid(eus), longus colli, the anterior, medius, and posterior scalenes, digastric(us), stylohyoid(eus), mylohyoid(eus), geniohyoid(eus), sternohyoid(eus), omohyoid(eus), sternothyroid(eus), and thyrohyoid(eus). (12 Dec 1998) |
| strap muscles | The small, flat muscles inferior to the hyoid bone including the sternohyoid, omohyoid, sternothyroid, thyrohyoid, and levator muscle of the thyroid gland. Synonym: musculi infrahyoidei, strap muscles. (05 Mar 2000) |
| suboccipital muscles | A group of muscles located immediately below the occipital bone; they are: rectus capitis anterior muscle, rectus capitis posterior major and minor muscles, rectus capitis lateralis musculus, obliquus capitis superior and inferior muscles; innervated by suboccipital nerve; although actions are described, it is held by many authorities that these muscles act primarily as organs of proprioception. Synonym: musculi suboccipitales. (05 Mar 2000) |
| superficial back muscles | Muscles originating from the vertebral column and having their fleshy bellies located in the back, but inserting onto the appendicular skeleton of the upper limb or the ribs. They are not innervated by dorsal primary rami of spinal nerves, as are the deep or true muscles of the back; includes the trapezius muscle (innervated by spinal accessory nerve) and latissimus dorsi, rhomboids, levator scapulae, and thoracic muscles (innervated by ventral primary rami of spinal nerves, or derivatives thereof). (05 Mar 2000) |
| superior retinaculum of extensor muscles | The ligament that binds down the extensor tendons proximal to the ankle joint; it is continuous with (a thickening of) the deep fascia of the leg. Synonym: retinaculum musculorum extensorum superius, ligamentum transversum cruris, superior retinaculum of extensor muscles, transverse crural ligament, transverse ligament of leg. (05 Mar 2000) |
| deep muscles of back | Muscles of the back innervated by the dorsal primary rami of spinal nerves; includes erector spinae, transversospinalis, interspinal, and intertransverse muscles; excludes the superficial back muscles which are appendicular and are innervated by ventral rami, and the trapezius, innervated by the spinal accessory nerve. Synonym: true muscles of back. (05 Mar 2000) |
| suprahyoid muscles | The group of muscles attached to the upper part of the hyoid bone including the digastric, stylohyoid, mylohyoid, and geniohyoid muscles. Synonym: musculi suprahyoidei. (05 Mar 2000) |
| synergistic muscles | Muscle's having a similar and mutually helpful function or action. (05 Mar 2000) |
| dorsal interosseous muscles of foot | Four muscles in the foot; origin, from sides of adjacent metatarsal bones; insertion, first into medial, second into lateral side of proximal phalanx of second toe, third and fourth into lateral side of proximal phalanx of third and fourth toes; action, abduct toes 2-4 from an axis through the second toe; nerve supply, lateral plantar. Synonym: musculi interossei dorsalis pedis. (05 Mar 2000) |
| dorsal interosseous muscles of hand | Four muscles in the hand; origin, sides of adjacent metacarpal bones; insertion, proximal phalanges and extensor expansion, first on radial side of index, second on radial side of middle finger, third on ulnar side of middle finger, fourth on ulnar side of ring finger; action, abduct fingers 2-4 from the axis of the middle finger, nerve supply, ulnar. Synonym: musculi interossei dorsalis manus. (05 Mar 2000) |