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radial and axillary nerves muscular and cutaneous innervation

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Of the three motions, the deltoid acts most powerfully in abduction. The C5 neurologic level supplies sensation to the lateral arm from the summit of the shoulder to the elbow. The purest patch of axillary nerve sensation, pictured here on the right, lies over the lateral portion of the deltoid muscles. This localized sensory area within the C5 dermatome is useful for indicating specific trauma to the axillary nerve, as well as general trauma to the C5 nerve root.

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Axillary nerve injury ... the Unhappy Triad ... shoulder dislocation + rotator cuff tear + axillary nerve injury

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nerves of the upper limb posterior view radial ulnar medial musculocutaneous axillary nerve

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lumbar plexus muscular innervation and cutaneous innervation

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nerves of the upper limb anterior view radial ulnar medial musculocutaneous axillary nerve

A primer on upper extremity regional anesthesia, including interscalene, supraclavicular, infraclavicular, and axillary nerve blocks.

Upper and lower suprascapular nerve arises from the superior trunk of the brachial plexus.

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Deep dissection of the shoulder with the muscles divided and reflected to show the spine of scapula, humerus, axillary nerve and posterior circumflex humeral artery. By George Henry Ford from 'Illustrations of Dissections' by George Viner Ellis, 1867. ~~ www.facebook.com/TheIrregularAnatomist ~~ www.twitter.com/Irr_Anatomist