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Superficiales trunci

Mm. Superficialies dorsi

MuscleOriginInsertionFunction
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.
Created by: gustafb82