Miss, this is only my thought. Anyone can feel free to refute it. If the damage is lower motor neuron bringing weakness and atrophy, alcohol would compound the weakness. Alcohol is also a depressant... so while a bit is probably fine, too much brings depression, emotionally speaking. If the damage is upper motor neuron, bringing about spasticity and hard muscles, it seems alcohol would be a form of relaxant.
As far as appearance versus reality, it seems like either could take place. I've had damage permanently from overdoing (recently, overdoing in the area of talking/visiting) and from allowing compression of nerves (in both cases, probably physical causes for loss), Alcohol can lead to falls, which may or may not cause permanent damage. I'm also a former alcoholic (although in AA there is no such thing. I do not drink, however) and I'm aware if I ever used alcohol to "help" it would be a slide into a deep hole.
As you can tell, I'm wary, yet I do know that for a person who doesn't have an "addictive personality" and is careful, there may be no reason for concern.