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Compartment
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Muscle
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Nerve
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Artery
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Action
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Pectoral
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pectoralis major
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medial and lateral pectoral
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thoracoacromial
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depression, flexion, adduction, medial rotation
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Pectoral
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pectoralis minor
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medial and lateral pectoral
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thoracoacromial
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depression, protraction
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Pectoral
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serratus anterior
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long thoracic
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thoracoacromial
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depression, protraction, lateral rotation
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Shoulder
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deltoid
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axillary
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thoracoacromial
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flexion, extension, abduction, medial rotation, lateral rotation
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Shoulder
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teres major
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lower subscapular
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subscapular, circumflex scapular
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adduction, extension, medial rotation
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Rotator Cuff
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supraspinatus
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suprascapular
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suprascapular
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abduction
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Rotator Cuff
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infraspinatus
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suprascapular
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suprascapular
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lateral rotation
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Rotator Cuff
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teres minor
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axillary
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subscapular, circumflex scapular
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lateral rotation
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Rotator Cuff
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subscapularis
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upper and lower subscapular
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subscapular, circumflex scapular
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medial rotation
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Superficial Extrinsic
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trapezius
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spinal accessory
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elevate, depress, retract pec girdle
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Superficial Extrinsic
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latissimus dorsi
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thoracodorsal
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thoracodorsal, subscapular
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extend, adduct, medially rotates shoulder
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Superficial Extrinsic
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rhomboid major
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dorsal scapular
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dorsal scapular
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retract and elevate pec girdle
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Superficial Extrinsic
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rhomboid minor
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dorsal scapular
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dorsal scapular
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retract and elevate pec girdle
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Superficial Extrinsic
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levator scapulae
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dorsal scapular
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dorsal scapular
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elevate pec girdle
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Intermediate Extrinsic
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serratus posterior superior
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intercostal T2-5
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proprioceptive for respiratory movements
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Intermediate Extrinsic
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serratus posterior inferior
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intercostal T9-12
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proprioceptive for respiratory movements
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Deep Intrinsic (Superficial)
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splenius capitus
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dorsal rami
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extend head, neck, laterally flex + rotate head and neck
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Deep Intrinsic (Superficial)
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splenius cervicis
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dorsal rami
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extend head, neck, laterally flex + rotate head and neck
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Deep Intrinsic (Intermediate)
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iliocostalis
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dorsal rami
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upright posture, extend spine, laterally flex spine, control rate of flexion
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Deep Intrinsic (Intermediate)
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longissimus
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dorsal rami
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upright posture, extend spine, laterally flex spine, control rate of flexion
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Deep Intrinsic (Intermediate)
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spinalis
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dorsal rami
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upright posture, extend spine, laterally flex spine, control rate of flexion
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Deep Intrinsic (Deep)
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semispinalis
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dorsal rami
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local stability, proprioceptive function, extend spine, laterally flex + rotate
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Deep Intrinsic (Deep)
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multifidus
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dorsal rami
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local stability, proprioceptive function, extend spine, laterally flex + rotate
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Deep Intrinsic (Deep)
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rotatores
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dorsal rami
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local stability, proprioceptive function, extend spine, laterally flex + rotate
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Deep Intrinsic (Deep - Minor)
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levatores costarum
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dorsal rami
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elevation of the ribs
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Deep Intrinsic (Deep - Minor)
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interspinalis
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dorsal rami
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extension of neck and spine, proprioception
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Deep Intrinsic (Deep - Minor)
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intertransversarii
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dorsal rami
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lateral flexion, proprioception
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