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a. Deltoid (anterior & medial heads)
b. T.A. Musculus Deltoideus.
b. View 3D Image of muscle.

Origin (proximal attachments)
a. Anterior head: anterior surface of the lateral clavicle.
b. Middle head: acromion and spine of the scapula.

Insertion (distal attachments)
a. Deltoid tuberosity of the humerus.

Anterior head:
a. Flexes the arm at the shoulder.
b. Medially rotates the arm at the shoulder.
Middle head:
a. Abducts the arm at the shoulder.

Nerve & Nerve Roots:
a. Nerve: Axillary nerve
b. Nerve roots: C5 and C6

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