Axial Muscles - Trunk/Abdomen

External intercostals

Internal intercostals

Serratus anterior

*Rectus sheath (connective tissue)*

*Linea alba (connective tissue)*

Rectus abdominis

Action = flex vertebral column, compress the abdomen

External abdominal oblique

Action = flex vertebral column, rotate the vertebral column laterally flex the vertebral column, compress abdomen

Internal abdominal oblique

Action = flex vertebral column, rotate the vertebral column laterally flex the vertebral column, compress abdomen

Transverse abdominal (transversus abdominus)

Pectoralis major

Action = flex and extend the shoulder, adduct the shoulder

Pectoralis minor

Latissimus dorsi

Trapezius

Rhomboid minor

Rhomboid major

Quadratus lumborum

Teres major

Rotator cuff group (mnemonic: “SITS”): list the 4 muscles

Supraspinatus

Infraspinatus

Teres minor

Subscapularis

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Action for all rotator cuff = circumduction of the shoulder

Rotator cuff group

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Supraspinatus

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Rotator cuff group

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Infraspinatus

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Rotator cuff group

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Teres minor

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Rotator cuff group

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Subscapularis

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Diaphragm