Our expert says:
The problem with motor neuron disease is that the muscles of the heart and diaphragm/ribs fail which can cause heart failure and or respiratory failure. If he deteriorated badly in 10 days, it is not a good sign. I would advise you to see him as soon as possible, as these things are totally unpredictable,and at least you will be able to talk to him before he is unable to communicate with you anymore.
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