| musculus interspinalis lumborum | Origin, superior margin of lumbar spinous process; insertion, inferior margin of next superior spinous process; action, extends lumbar vertebrae; nerve supply, dorsal primary rami of lumbar spinal nerves. Synonym: musculus interspinalis lumborum, lumbar interspinal muscle. (05 Mar 2000) |
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| musculus interspinalis cervicis | Origin, tubercle of spinous process of cervical vertebra; insertion, tubercle of spinous process of next superior vertebra; action, extends the neck; nerve supply, dorsal rami of cervical nerves. Synonym: musculus interspinalis cervicis, cervical interspinal muscle. (05 Mar 2000) |
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| musculus interspinalis thoracis | Often poorly developed or absent muscles between spinous process of thoracic vertebrae; action, extends thoracic vertebrae; nerve supply, dorsal primary rami of thoracic nerves. Synonym: musculus interspinalis thoracis, thoracic interspinal muscle. (05 Mar 2000) |
| musculus iliocostalis lumborum | <anatomy, muscle> Origin, with erector spinae; insertion, the angles of lower six ribs; action, extends, abducts, and rotates lumbar vertebrae; nerve supply, dorsal branches of thoracic and lumbar nerves. Synonym: musculus iliocostalis lumborum, lumbar iliocostal muscle, musculus sacrolumbalis. (05 Mar 2000) |
| musculus quadratus lumborum | <anatomy, muscle> Origin, iliac crest, iliolumbar ligament, and transverse processes of lower lumbar vertebrae; insertion, twelfth rib and transverse processes of upper lumbar vertebrae; action, abducts trunk; nerve supply, ventral primary rami of upper lumbar spinal nerves. Synonym: musculus quadratus lumborum, lumbar quadrate muscle, quadrate muscle of loins. (05 Mar 2000) |
| interspinalis | See: interspinales muscles. (05 Mar 2000) |
| linea interspinalis | Line passing through both anterior superior iliac spines indicating the interspinal plane. Synonym: linea interspinalis. (05 Mar 2000) |
| rotatores lumborum muscles | The rotator muscles of the lumbar vertebrae. Synonym: musculi rotatores lumborum, lumbar rotator muscles. (05 Mar 2000) |
| musculi intertransversarii laterales lumborum | Origin, transverse processes of lumbar vertebrae; insertion, next superior transverse process; action, abducts lumbar vertebrae; nerve supply, ventral branches of lumbar nerves. Synonym: musculi intertransversarii laterales lumborum, lateral lumbar intertransverse muscles. (05 Mar 2000) |
| musculi intertransversarii mediales lumborum | Origin, accessory and mamillary processes of lumbar vertebrae; insertion, corresponding processes of next superior vertebra; action, abducts lumbar vertebrae; nerve supply, dorsal primary rami of lumbar spinal nerves. Synonym: musculi intertransversarii mediales lumborum, medial lumbar intertransverse muscles. (05 Mar 2000) |
| musculi rotatores lumborum | The rotator muscles of the lumbar vertebrae. Synonym: musculi rotatores lumborum, lumbar rotator muscles. (05 Mar 2000) |
| iliocostalis lumborum | <anatomy, muscle> Origin, with erector spinae; insertion, the angles of lower six ribs; action, extends, abducts, and rotates lumbar vertebrae; nerve supply, dorsal branches of thoracic and lumbar nerves. Synonym: musculus iliocostalis lumborum, lumbar iliocostal muscle, musculus sacrolumbalis. (05 Mar 2000) |
| quadratus lumborum | <anatomy, muscle> Origin, iliac crest, iliolumbar ligament, and transverse processes of lower lumbar vertebrae; insertion, twelfth rib and transverse processes of upper lumbar vertebrae; action, abducts trunk; nerve supply, ventral primary rami of upper lumbar spinal nerves. Synonym: musculus quadratus lumborum, lumbar quadrate muscle, quadrate muscle of loins. (05 Mar 2000) |
| musculus | <anatomy> A muscle. For histologic description, see muscle. Synonym: muscle. Origin: L. A little mouse, a muscle, fr. Mus (mur-), a mouse (05 Mar 2000) |
| musculus abductor digiti minimi manus | 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) |
| musculus abductor digiti minimi pedis | 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) |