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The spine may end up in a "round back" or inversely may extend too much into hyperlordosis. Individuals may also experience scoliosis. Individuals may also experience scoliosis. Joints commonly associated with hypermobility (wrists, knees, ankles, elbows, shoulders) may be at more severe risk to dislocate or strain.
For example, when standing up, the knees are extended. When a joint can move forward and backward, such as the neck and trunk, extension is movement in the posterior direction. [10] Extension of the hip or shoulder moves the arm or leg backward. [11] Even for other upper extremity joints – elbow and wrist, backward movement results in extension.
A gyroscopic wrist exerciser. Video showing the use - from starting the rotation with a 'shoestring' over various movements with the holding hand until stopping the rotor with the second hand. The demonstrated speeds are, in part, very high and not recommended for normal exercise due to the resulting high forces.
A simpler method using this same concept is to ask the patient to demonstrate the movement of trying a doorknob or screwing in a light bulb. When testing for this condition in legs, ask the patient to tap your hand as quickly as possible with the ball of each foot in turn. Movements tend to be slow or awkward.
Compression of S1 roots may result in weakness in plantarflexion; these nerves run from the lower back to the bottom of the foot. [ citation needed ] Pronation at the forearm is a rotational movement at the radioulnar joint , or of the foot at the subtalar and talocalcaneonavicular joints .
Wrist drop is a medical condition in which the wrist and the fingers cannot extend at the metacarpophalangeal joints. The wrist remains partially flexed due to an opposing action of flexor muscles of the forearm. As a result, the extensor muscles in the posterior compartment remain paralyzed.
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The range of motion for this is very limited, most people can't even hyperextend 45 degrees. This is also a static-active stretch for the anterior deltoid and biceps. A compound variation is a behind the back row. This row, when performed with a barbell, has also been called a rear delt raise.