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Erb's palsy is a paralysis of the arm caused by injury to the upper group of the arm's main nerves, specifically the severing of the upper trunk C5–C6 nerves. These form part of the brachial plexus, comprising the ventral rami of spinal nerves C5–C8 and thoracic nerve T1.
Wrist mobility is often restricted due to inflammation of the forearm muscles as they contract and tighten due to injury. [2] Most wrist dislocations occur between the capitate and the lunate. [17] [18] Carpal fractures are caused by falling on an outstretched hand the wrist is hyper-extended in ulnar deviation with a component of rotation. [18]
There are generally twelve muscles in the posterior compartment of the forearm, which can be further divided into superficial, intermediate, and deep. Most of the muscles in the superficial and the intermediate layers share a common origin which is the outer part of the elbow, the lateral epicondyle of humerus.
These nerves originate in the fifth, sixth, seventh and eighth cervical (C5–C8), and first thoracic (T1) spinal nerves, and innervate the muscles and skin of the chest, shoulder, arm and hand. [1] [2] [3] Brachial plexus injuries can occur as a result of shoulder trauma (e.g. dislocation [4]), tumours, or inflammation, or obstetric.
In anatomy, extension is a movement of a joint that increases the angle between two bones or body surfaces at a joint. Extension usually results in straightening of the bones or body surfaces involved. For example, extension is produced by extending the flexed (bent) elbow. Straightening of the arm would require extension at the elbow joint.
Hinge at the hips with a flat back and hold a dumbbell in left hand, right arm out straight and held at shoulder height. ... Straighten arm to lower dumbbell back down. Repeat. Do 8 reps on each side.
Learn how muscle memory works, how long it takes to develop, and why it’s crucial for fitness. Plus, tips to train smarter and build strength and muscle faster. ... Simple, single-joint ...
Tap elbow to floor, then straighten arm to return to starting position. Repeat with other arm. Continue alternating for 6 reps per side (if using heavy weights) or 8-10 reps per side (if using ...