rotatores muscles


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rotatores muscles

the deepest muscles of the transversospinales group. These small muscles are present throughout the length of the vertebral column but are best developed in the thoracic region. See also multifidus, semispinalis muscles.

ro·ta·to·res mus·cles

(rō'tă-tō'rēz mŭs'ĕlz)
Deepest of the three layers of transversospinalis muscles, chiefly developed in the thoracic region; they arise from the transverse process of one vertebra and are inserted into the root of the spinous process of the next two or three vertebrae above; action, traditionally described as a column, it is more likely that these muscles, provided with a very high density of muscle spindles, are organs of proprioception; nerve supply, dorsal primary rami of the spinal nerves.
Synonym(s): musculi rotatores [TA] .