Muscle of thorax: origin, insertion, action and innervation

7 muscles of this region (Muscle of thorax) with their origin, insertion, action, nerve and artery. Press a name to see it on the 3D model.

Muscle	Origin	Insertion	Action	Innervation	Arterial supply
clavicular head of pectoralis major muscle Pars clavicularis musculi pectoralis majoris	clavicle	intertubercular sulcus of the humerus
external intercostal muscles Musculi intercostales externi			inspiration movement	intercostal nerves
intercostal muscle			inspiration movement	intercostal nerves
internal intercostal muscle Musculi intercostales interni			expiration movement	intercostal nerves
pectoralis major muscle Musculus pectoralis major	clavicle sternum costal cartilage Rectus sheath	intertubercular sulcus of the humerus	flexion of the arm at the shoulder joint adduction of the arm at the shoulder joint medial rotation of the arm at the shoulder joint extension of the arm via the shoulder joint	medial pectoral nerve lateral pectoral nerve	thoraco-acromial artery lateral thoracic artery superior thoracic artery
sternocostal head of pectoralis major muscle Pars sternocostalis musculi pectoralis majoris	sternum costal cartilage	intertubercular sulcus of the humerus
transversus thoracis Musculus transversus thoracis			exhalation	intercostal nerves