The solution of the falling arm: why and the mechanism of its formation

2021-01-26 12:00 AM

Existing shoulder ligaments and muscles on the spine are either directly damaged or indirectly collided, the arm's ability to maintain posture is impaired and the arm will fall.

The examiner has shaped the patient's arm towards what it can perform, and then the patient is asked to maintain the form before slowly lowering the arm to rest. A positive test

Figure. The arm test falls

Reason

Ligament rupture of the shoulder joint - a special form of muscle on the spine.

Nerve damage.

Mechanism

The arms form is performed using the muscles on the spines and deltas.

The deltoid muscles are mainly responsible for movement after about 15 °, while the muscle on the spine is responsible for the first 15 ° movement. Therefore, if the current shoulder ligament and muscle on the spine are either directly damaged or collided indirectly, the arm's ability to maintain the posture is impaired and the arm falls.

Meaning

There are limited studies on the value of reduced brachial therapy in detecting shoulder ligament tear. One small study showed a sensitivity of only 10% but a very high 98% specificity. The formula for calculating the likelihood of being positive is greater than 10. If the test is positive, it may mention a tear current.