Back and Limbs including brachial plexus (lab and lecture)

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Last updated 5:29 PM on 8/27/26
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18 Terms

1
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Pectoralis Minor

  • medial pectoral nerve (medial nerve)

  • Holds scapula against thoracic wall


2
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Pectoralis Major

  • Lateral and medial pectoral nerves (lateral and medial cords)

  • Adduct humerus, protract scapula, medially rotate humerus


3
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Serratus Anterior

  • Long thoracic nerve from roots

  • Protract scapula


4
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Trapezius

  • cranial nerves

  • Elevation, depression, retraction


5
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6
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7
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Latissimus Dorsi

  • Thoracodorsal nerve

  • Extend and adduct humerus


8
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Levator Scapulae

  • Dorsal scapular nerve (C5 root)

  • Elevate scapula


9
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Rhomboid Minor

  • Dorsal scapular nerve (C5 root)

  • Depress glenoid fossa and retract scapula


10
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Rhomboid Major

  • Dorsal scapular nerve (C5 root)

  • Depress glenoid fossa and retract scapula


11
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12
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<p>Muscle</p>

Muscle

  • Erector spinae muscle group


13
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Deltoid

  • Axillary nerve (terminal branch)

  • Abduct humerus and medially and laterally rotate humerus


14
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Subscapularis (part of rotator cuff muscles)

  • Posterior cord

  • Hold humeral head in place and medial rotator


15
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Infraspinatus

  • Suprascapular nerve (superior trunk)

  • Lateral rotator


16
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Supraspinatus

  • Suprascapular nerve (superior trunk)

  • Lateral rotator


17
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Teres Major

  • Posterior cord

  • Adduct humerus


18
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<p>Muscle, Innervation, Action </p>

Muscle, Innervation, Action

  • Teres Minor (part of rotator cuff)

  • axillary nerve (terminal branch)

  • lateral rotator