Features of the arm perpendicular to the floor while working on the computer, the source of muscular arms kreng using these muscles may be repeated for a long time, kreng muscle causes fatigue and muscle will eventually go to the nearby include: trapezius, which affects the spinal accessory nerve nerves nerves neck part 3 and 4 in addition to the Sternocleidomastoid muscles cause a headache and neck area.
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