| musculus deltoideus | <anatomy, muscle> Origin, anterior border and upper surface over lateral third of clavicle, lateral border of acromion process, lower border of spine of scapula; insertion, lateral side of shaft of humerus a little above its middle (deltoid tuberosity); action, abduction, flexion, extension, and rotation of arm; nerve supply, axillary from fifth and sixth cervical spinal cord segments through brachial plexus. Synonym: musculus deltoideus, deltoid. (05 Mar 2000) |
|---|---|
| musculus depressor anguli oris | <anatomy, muscle> Origin, lower border of mandible anteriorly; insertion, blends with other muscles in lower lip near angle of mouth; action, pulls down corners of mouth; nerve supply, facial. Synonym: musculus depressor anguli oris, musculus triangularis labii inferioris, musculus triangularis, triangular muscle. (05 Mar 2000) |
| musculus depressor labii inferioris | <anatomy, muscle> Origin, anterior portion of lower border of mandible; insertion, orbicularis oris musculus and skin of lower lip; action, depresses lower lip; nerve supply, facial. Synonym: musculus depressor labii inferioris, depressor muscle of lower lip, musculus quadratus labii inferioris, musculus quadratus menti. (05 Mar 2000) |
| musculus depressor septi | <anatomy> A vertical fasciculus from the orbicularis oris musculus passing upward along the median line of the upper lip, and inserted into the cartilaginous septum of the nose; action, depresses septum; nerve supply, facial. Synonym: musculus depressor septi, depressor muscle of septum. (05 Mar 2000) |
| musculus depressor supercilii | <anatomy> Fibres of the orbital part of the orbicularis oculi musculus insert in the eyebrow; action, depresses eyebrow; nerve supply, facial. Synonym: musculus depressor supercilii, depressor muscle of eyebrow. (05 Mar 2000) |
| musculus detrusor urinae | The muscular coat of the bladder. Synonym: musculus detrusor urinae. (05 Mar 2000) |
| musculus diaphragma | <anatomy> The thin muscle below the lungs and heart that separates the chest from the abdomen. (12 May 1997) |
| musculus digastricus | <anatomy> One of the suprahyoid group of muscles consisting of two bellies united by a central tendon which is connected to the body of the hyoid bone; origin, by posterior belly from the digastric groove medial to the mastoid process; insertion, by anterior belly into lower border of mandible near midline; action, elevates the hyoid when mandible is fixed; depresses the mandible when hyoid is fixed; nerve supply, posterior belly from facial, anterior belly by nerve to the mylohyoid from the mandibular division of trigeminal, a muscle with two fleshy bellies separated by a fibrous insertion. Synonym: musculus digastricus, biventer mandibulae, musculus biventer mandibulae, two-bellied muscle. (05 Mar 2000) |
| musculus dilatator | <anatomy> A muscle which opens an orifice or dilates the lumen of an organ; it is the dilating or opening component of a pylorus (the other component is the sphincter muscle). Synonym: musculus dilatator, musculus dilator. (05 Mar 2000) |
| musculus dilator | <anatomy> A muscle which opens an orifice or dilates the lumen of an organ; it is the dilating or opening component of a pylorus (the other component is the sphincter muscle). Synonym: musculus dilatator, musculus dilator. (05 Mar 2000) |
| musculus dilator iridis | <anatomy> The radial muscular fibres extending from the sphincter pupillae to the ciliary margin; some anatomists regard them as elastic, not muscular, in humans. Synonym: musculus dilator pupillae, dilator iridis, dilator of pupil, musculus dilator iridis. (05 Mar 2000) |
| musculus dilator naris | See: nasalis muscle. (05 Mar 2000) |
| musculus dilator pupillae | <anatomy> The radial muscular fibres extending from the sphincter pupillae to the ciliary margin; some anatomists regard them as elastic, not muscular, in humans. Synonym: musculus dilator pupillae, dilator iridis, dilator of pupil, musculus dilator iridis. (05 Mar 2000) |
| musculus dilator pylori gastroduodenalis | The longitudinal muscular fibres that open the gastroduodenal junction. Synonym: musculus dilator pylori gastroduodenalis. (05 Mar 2000) |
| musculus dilator pylori ilealis | The longitudinal muscular fibres that open the ileal orifice at the level of the caecocolic junction. Synonym: musculus dilator pylori ilealis. (05 Mar 2000) |