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Superficiales trunci
Mm. Superficialies dorsi
| Muscle | Origin | Insertion | Function |
|---|---|---|---|
| 1st Layer/ M. Trapezius | Protuberantia occipitalis externa; Linea nuchae superior; Lig. nuchae; Proc. spinosi of the thoracic vertebrae | Spina scapulae; Acromion; Extremitas acromialis claviculae | Pulls scapula towards the vertebral column; The upper part elevates the shoulder; The lower part pulls the shoulder downward |
| 1st Layer/ M. Latissimus dorsi | Crista iliaca; Fascia thoracolumbalis; Proc. spinosus verterae thoracicae VII-XII; Facies externae costarum IX-XII; Angulus inferior scapulae | Crista tuberculi minoris humeri | Adductio brachii, extensio brachii, rotatio interna brachii. Acts as expiration muscle. |
| 2nd Layer/ M. Rhomboideus major | Proc. spinosus vertebrae thoracicae I-IV | Margo medialis scapulae | Elevates scapula and pulls scapula towards the veretebral column |
| 2nd Layer/ M. Rhomboideus minor | Proc. spinosus vertebrae cervicalis VI-VII; Proc. spinosus vertebrae thoracicae I; Lig nuchae | Margo medialis scapulae | Elevates scapula and pulls scapula towards the veretebral column |
| 2nd Layer/ M. Levator scapulae | Proc. transversus vertebrae cervicalis I-IV | Angulus superior scapulae | Elevates scapula. |
| 3rd Layer/ M. Serratus posterior superior | Proc. spinosus vertebrae cervicalis VI-VII; Proc. spinosus vertebrae thoracicae I-II | Facies externae costarum II-V | Elevates the ribs. Acts as inspiration muscle. |
| 3rd Layer/ M. Serratus posterior inferior | Proc. spinosus vertebrae thoracicae XI-XII and vertebrae lumbales I-II | Facies externae costarum IX-XII | Pulls the ribs downward. Acts as expiration muscle. |