Pectoralis major: A - adduction of arm. O - clavicle/sternum. I - humerus.
Pectoralis minor: A - forwrd and downward & elevate ribs. O - ribs 3-5. I - scapula.
Externa/Internal oblique: A - rotantes/flexes vertebral column & lateral flexion. O - 5-12 ribs. I - ilium.
Transverse abdominis: A - (flexes abs) compresses abdomen. O - ilium and ribs 6-12. I - xiphoid process & pubis.
Rectus abdominis: A - flexion of vertebral column. O - pubis. I - sternum.
Serratus anterior: A - scapula protraction. O - ribs 1-8. I - scapula.
Internal/External intercostal: A - elevates and depresses ribs during breathing. O - superior border of ribs. I - inferior border of ribs.
Sternocleidomastoid: A - lateral flexion/extension of neck when combined neck flexion. O - manubrium and clavicle. I - mastoid process.
Trapezius: A - upper fiber: elevate scapula and extend neck back, middle fiber - adduct scap. and lower fiber - depresses scap. O - occipital bone and C7-T12. I - clavicle and scapula.
Latissimus dorsi: A - adduction and shoulder extension. O - ribs 8-12. I - humerus.
Rhomboid major/minor: A - scapular adduction. O - C7-T4. I - scap.
Levator scapulae: A - elevate scap. O - C1-C4. I - scap.
Pectoralis minor: A - forwrd and downward & elevate ribs. O - ribs 3-5. I - scapula.
Externa/Internal oblique: A - rotantes/flexes vertebral column & lateral flexion. O - 5-12 ribs. I - ilium.
Transverse abdominis: A - (flexes abs) compresses abdomen. O - ilium and ribs 6-12. I - xiphoid process & pubis.
Rectus abdominis: A - flexion of vertebral column. O - pubis. I - sternum.
Serratus anterior: A - scapula protraction. O - ribs 1-8. I - scapula.
Internal/External intercostal: A - elevates and depresses ribs during breathing. O - superior border of ribs. I - inferior border of ribs.
Sternocleidomastoid: A - lateral flexion/extension of neck when combined neck flexion. O - manubrium and clavicle. I - mastoid process.
Trapezius: A - upper fiber: elevate scapula and extend neck back, middle fiber - adduct scap. and lower fiber - depresses scap. O - occipital bone and C7-T12. I - clavicle and scapula.
Latissimus dorsi: A - adduction and shoulder extension. O - ribs 8-12. I - humerus.
Rhomboid major/minor: A - scapular adduction. O - C7-T4. I - scap.
Levator scapulae: A - elevate scap. O - C1-C4. I - scap.