Trunk Muscles action
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Extends neck and adducts scapula | trapezius
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| extend and adducts humerus | Latissimus dorsi
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| Abducts humerus | Deltoid
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| Extends arm | Triceps brachii
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| Adducts and flexes humerus | Pectoralis major
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| Flexes vertebral column | Rectus abdominis
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| Flexes and rotates vertebral column | external oblique
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| Flexion of Elbow | Brachioradialis
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| Internal rotation (medial rotation) of the humerus | Teres major
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| Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. | Spinalis
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| protracts and stabilizes scapula, assists in upward rotation. | Serratus anterior
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| Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. | Longissimus
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| Compresses abdominal contents | Transverse abdominis
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| laterally rotates the arm, stabilizes humerus | Teres minor
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| Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. | Iliocostalis
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| Lateral rotation of arm and stabilizes humerus | Infraspinatus
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| Flexes elbow and supinates elbow | Biceps brachii
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| Flexion of the elbow | Brachialis
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| Compresses abdomen; unilateral contraction rotates vertebral column to same side. | internal oblique
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