| splenius muscle of head | <anatomy, muscle> Origin, from ligamentum nuchae of last four cervical vertebrae and supraspinous ligament of first and second thoracic vertebrae; insertion, lateral half of superior nuchal line and mastoid process; action, rotates head and extends neck; nerve supply, dorsal primary rami of second to sixth cervical spinal nerves. Synonym: musculus splenius capitis, splenius muscle of head. (05 Mar 2000) |
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| splenius muscle of neck | <anatomy, muscle> Origin, from supraspinous ligament and spinous processes of third to fifth thoracic vertebrae; insertion, posterior tubercles of transverse processes of first and second (sometimes third) cervical vertebrae; action, rotates and extends neck; nerve supply, dorsal primary rami of fourth to eighth cervical spinal nerves. Synonym: musculus splenius cervicis, musculus splenius colli, splenius muscle of neck. (05 Mar 2000) |
| musculus splenius capitis | <anatomy, muscle> Origin, from ligamentum nuchae of last four cervical vertebrae and supraspinous ligament of first and second thoracic vertebrae; insertion, lateral half of superior nuchal line and mastoid process; action, rotates head and extends neck; nerve supply, dorsal primary rami of second to sixth cervical spinal nerves. Synonym: musculus splenius capitis, splenius muscle of head. (05 Mar 2000) |
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| musculus splenius cervicis | <anatomy, muscle> Origin, from supraspinous ligament and spinous processes of third to fifth thoracic vertebrae; insertion, posterior tubercles of transverse processes of first and second (sometimes third) cervical vertebrae; action, rotates and extends neck; nerve supply, dorsal primary rami of fourth to eighth cervical spinal nerves. Synonym: musculus splenius cervicis, musculus splenius colli, splenius muscle of neck. (05 Mar 2000) |
| musculus splenius colli | <anatomy, muscle> Origin, from supraspinous ligament and spinous processes of third to fifth thoracic vertebrae; insertion, posterior tubercles of transverse processes of first and second (sometimes third) cervical vertebrae; action, rotates and extends neck; nerve supply, dorsal primary rami of fourth to eighth cervical spinal nerves. Synonym: musculus splenius cervicis, musculus splenius colli, splenius muscle of neck. (05 Mar 2000) |
| splenius | <anatomy> A flat muscle of the back of the neck. Source: Websters Dictionary (01 Mar 1998) |
| splenius capitis | <anatomy, muscle> Origin, from ligamentum nuchae of last four cervical vertebrae and supraspinous ligament of first and second thoracic vertebrae; insertion, lateral half of superior nuchal line and mastoid process; action, rotates head and extends neck; nerve supply, dorsal primary rami of second to sixth cervical spinal nerves. Synonym: musculus splenius capitis, splenius muscle of head. (05 Mar 2000) |
| splenius cervicis | <anatomy, muscle> Origin, from supraspinous ligament and spinous processes of third to fifth thoracic vertebrae; insertion, posterior tubercles of transverse processes of first and second (sometimes third) cervical vertebrae; action, rotates and extends neck; nerve supply, dorsal primary rami of fourth to eighth cervical spinal nerves. Synonym: musculus splenius cervicis, musculus splenius colli, splenius muscle of neck. (05 Mar 2000) |
| abdominal external oblique muscle | <anatomy, muscle> Origin, fifth to twelfth ribs; insertion, anterior half of lateral lip of iliac crest, inguinal ligament, and anterior layer of the rectus sheath; action, diminishes capacity of abdomen, draws thorax downward; nerve supply, thoracoabdominal nerves. Synonym: musculus obliquus externus abdominis, abdominal external oblique muscle. (05 Mar 2000) |
| abdominal internal oblique muscle | <anatomy, muscle> Origin, iliac fascia deep to lateral part of inguinal ligament, anterior half of crest of ilium, and lumbar fascia; insertion, tenth to twelfth ribs and sheath of rectus; some of the fibres from inguinal ligament terminate in the conjoint tendon; action, diminishes capacity of abdomen, flexes lumbar vertebral column (bends thorax forward); nerve supply, lower thoracic. Synonym: musculus obliquus internus abdominis, abdominal internal oblique muscle. (05 Mar 2000) |
| abdominal muscle deficiency syndrome | <syndrome> Congenital absence (partial or complete) of abdominal muscles, in which the outline of the intestines is visible through the protruding abdominal wall; in males, genitourinary anomalies (urinary tract dilation and cryptorchidism) are also found; genetics unclear. (05 Mar 2000) |
| abductor digiti minimi muscle of foot | Origin, lateral and medial processes of calcanean tuberosity; insertion, lateral side of proximal phalanx of fifth toe; action, abducts and flexes little toe; nerve supply, lateral plantar nerve. Synonym: musculus abductor digiti minimi pedis, abductor muscle of little toe, musculus abductor digiti quinti. (05 Mar 2000) |
| abductor digiti minimi muscle of hand | Origin, pisiform bone and pisohamate ligament; insertion, medial side of base of proximal phalanx of the little finger; action, abducts and flexes little finger; nerve supply, ulnar. Synonym: musculus abductor digiti minimi manus, abductor muscle of little finger, musculus abductor digiti quinti. (05 Mar 2000) |
| abductor muscle | <anatomy> Any muscle used to pull a body part away from the midline of the body. For example, the abductor leg muscles serve to spread the legs. The opposite of abductor is adductor. (12 Dec 1998) |
| abductor muscle of great toe | <anatomy, muscle> Origin, medial process of calcaneal tuberosity, flexor retinaculum, and plantar aponeurosis; insertion, medial side of proximal phalanx of great toe; action, abducts great toe; nerve supply, medial plantar. Synonym: musculus abductor hallucis, abductor muscle of great toe. (05 Mar 2000) |
| abductor muscle of little finger | Origin, pisiform bone and pisohamate ligament; insertion, medial side of base of proximal phalanx of the little finger; action, abducts and flexes little finger; nerve supply, ulnar. Synonym: musculus abductor digiti minimi manus, abductor muscle of little finger, musculus abductor digiti quinti. (05 Mar 2000) |
| abductor muscle of little toe | Origin, lateral and medial processes of calcanean tuberosity; insertion, lateral side of proximal phalanx of fifth toe; action, abducts and flexes little toe; nerve supply, lateral plantar nerve. Synonym: musculus abductor digiti minimi pedis, abductor muscle of little toe, musculus abductor digiti quinti. (05 Mar 2000) |