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MuscleOriginInsertionNerveAction
Thoracohumeral muscles
pectoralis majorclavicle, sternum and the adjacent part 1st - 6th ribs and the aponeurosis of the external oblique muscleintertubercular groove of the humerusn. pectoralis lateralis + medialisBreathing: inspiration (auxiliary). Shoulder joint: auxiliary ventral flexion and abduction, the dorsal flexion of the auxiliary, auxiliary internal rotation, adduction
pectoralis minor3rd to 5th ribs, near their costal cartilagesprocessus coracoideus scapulaen. pectoralis medialisBreathing: inspiration (auxiliary). Shoulder: auxiliary depression
subclaviusfirst ribsubclavian groove of claviclen. subclaviusBreathing: inspiration (auxiliary). Depression of clavicle
serratus anterior1st to 9th ribmargo medialis scapulae, angulus inferior scapulaen. thoracicus longusBreathing: inspiration (auxiliary). Shoulder: protraction + angulus inferior: rotation externally. Shoulder joint: abduction (just above the horizontal)
Autochthonous muscles
intercostales externicranial part the ribs (1 to 11) - towards the rear, from above - forward and downcaudal part the ribs (2 to 12)nn. intercostales I.-XI.Breathing: inspiration. Fixation ribs
intercostales internicranial part the ribs (1 to 11) - direction from the front, top - back downcaudal part the ribs (2 to 12)nn. intercostales I.-XI.Breathing: expiration. Fixation ribs
intercostales intimicranial part the ribs (1 to 11) - direction from the front, top - back down inside the sulcus costaecaudal part the ribs (2 to 12)nn. intercostales I.-XI.Breathing: expiration (auxiliary). Fixation ribs
subcostalescranial part the ribs (1 to 11) - direction from the front, top - back down from the inside mm. intercostales intimi in area anguli costarumcaudal part the ribs (2 to 12)nn. intercostales I.-XI.Breathing: expiration (auxiliary). Fixation ribs. Sometime rudimentary
transversus thoracissternum (inner side)cartilage 2 to 6 ribs (inner side)nn. intercostales III. - IVBreathing: expiration (auxiliary).
Diafragm
diaphragma - pars lumbalisbackbone, lig. arcuatum med., lig. arcuatum lat.center tendineumn. phrenicusBreathing: inspiration.
diaphragma - pars costaliscartilage of the ribs (7 to 12)center tendineumn. phrenicusBreathing: inspiration.
diaphragma - pars sternalisprocessus xiphoideus aponeurosis transversus abdominiscenter tendineumn. phrenicusBreathing: inspiration.

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