Based on the given description above about Betty's signs and symptoms, the neurocognitive disorder that she is likely suffering from would be PARKINSON'S DISEASE. When we say Neurocognitive Disorder, this consists of a group of signs and symptoms which may be an indicator of a major disease. In this case, Betty's condition matches the symptoms of that of the Parkinson's disease. Hope this answer helps.
A separation of a joint would be much worse because a complete separation could require surgery when as a dislocation where once it happens, it will keep happening - it still is not something that would require surgery.
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