yogabook / muscles / autochthonous back muscles / semispinalis thoracis
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M. semispinalis thoracis
Origin: teat processes (processus mamillares) of the 6th to 12th thoracic vertebrae
Attachment: spinous processes of the first four thoracic and last two cervical vertebrae
Antagonists:
Movement: Bilateral innervation: extension of the spine; unilateral innervation: ipsilateral lateral flexion of the spine or elimination of contralateral lateral flexion.