Semispinalis Thoracis – Functional Anatomy
Semispinalis Thoracis Semispinalis Thoracis connects T7-T10 to C6-T4 trapping T5-T6 in the middle. Origin – transverse processes of T6-T10 Insertion – Spinous processes of T1-T4 Function – Extension and some rotation of the thoracic vertebrae. Wikipedia Entry for Semispinalis muscles