| musculus coracobrachialis | <anatomy> Relating to the coracoid process of the scapula and the arm. <muscle> Origin, coracoid process of scapula; insertion, middle of medial border of humerus; action, adducts and flexes the arm; resists downward dislocation of shoulder joint; nerve supply, musculocutaneous. See: coracobrachial bursa. Synonym: musculus coracobrachialis, Casser's perforated muscle, coracobrachial muscle. (05 Mar 2000) |
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| musculus corrugator cutis ani | Smooth muscle fibres radiating from the anal opening superficial to the external sphincter. Synonym: musculus corrugator cutis ani. (05 Mar 2000) |
| musculus corrugator supercilii | <anatomy, muscle> Origin, from orbital portion of musculus orbicularis oculi and nasal prominence; insertion, skin of eyebrow; action, draws medial end of eyebrow downward and wrinkles forehead vertically; nerve supply, facial. Synonym: musculus corrugator supercilii, Coiter's muscle, corrugator muscle, wrinkler muscle of eyebrow. (05 Mar 2000) |
| musculus cremaster | <anatomy, muscle> Origin, from internal oblique muscle and inguinal ligament; insertion, cremasteric fascia (spermatic cord); action, raises testicle; nerve supply, genital branch of genitofemoral; in the male the muscle envelops the spermatic cord and testis, in the female, the round ligament of the uterus. See: cremasteric fascia. Synonym: musculus cremaster, Riolan's muscle. Origin: G. Kremaster, a suspender, in pl. The muscles by which the testicles are retracted, fr. Kremannymi, to hang (05 Mar 2000) |
| musculus cricoarytenoideus lateralis | <anatomy, muscle> Origin, upper margin of arch of cricoid cartilage; insertion, muscular process of arytenoid; action, adducts vocal folds (narrows rima glottidis); nerve supply, recurrent laryngeal. Synonym: musculus cricoarytenoideus lateralis. (05 Mar 2000) |
| musculus cricoarytenoideus posterior | <anatomy, muscle> Origin, depression on posterior surface of lamina of cricoid; insertion, muscular process of arytenoid; action, abducts vocal folds, widening rima glottidis as for taking a breath; nerve supply, recurrent laryngeal. Synonym: musculus cricoarytenoideus posterior. (05 Mar 2000) |
| musculus cricopharyngeus | See: inferior constrictor muscle of pharynx. (05 Mar 2000) |
| musculus cricothyroideus | <anatomy, muscle> Origin, anterior surface of arch of cricoid; insertion, the anterior or straight part passes upward to ala of thyroid; the posterior or oblique part passes more outward to inferior horn of thyroid; action, makes vocal folds tense increasing the pitch of voice tone; nerve supply, external laryngeal branch of superior laryngeal nerve (from vagus). Synonym: musculus cricothyroideus. (05 Mar 2000) |
| musculus cruciatus | <anatomy> A general type of muscle in which the muscles or bundles of muscle fibres cross in an X-shaped configuration; e.g., the oblique arytenoid muscles. Synonym: musculus cruciatus. (05 Mar 2000) |
| musculus cutaneomucosus | <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) |
| musculus cutaneus | <anatomy> A muscle that lies in the subcutaneous tissue and attaches to the skin; it may or may not have a bony attachment. The muscles of expression are the chief examples of cutaneous muscles in the human. Synonym: musculus cutaneus. (05 Mar 2000) |
| 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) |