Semispinalis thoracis muscle - Musculus semispinalis thoracis


The semispinalis thoracis muscle is composed by bundles that detach form mamillary processes and course over the lateral face of semispinalis muscle to the dorsal portion of spinous processes.

Origin: Fascia of Longissimus.

Insertion: Spinous processes of the sixth thoracic to sixth cervical vertebra.

Action: Fixes the vertebral column and raises the neck.

Nerve: Medial branch of the dorsal branches of the cervical and thoracic nerves.

Text by Antoine Micheau, MD - Copyright IMAIOS


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