Eng: Longissimus thoracis

胸最長肌腰部

Longissimus thoracis pars lumborum, arising from the medial apsect of the PSIC, ascending to attach to the transverse processes of all five lumbar vertebrae

胸最長肌胸部

Longissimus thoracis pars thoracis, arising from back of the sacrum at the level of S3, the spinous processes of S3 up to L3, ascending to attach to all twelve ribs and the transverse processes of the thoracic vertebrae, contributes to Erector Spinae Aponeurosis