Muscle gets weaker, smaller, hurts. NEUROGENIC ATROPHY/MS?

Resolved question:
I'm concerned about neurogenic atrophy.

http://www.nlm.nih.gov/medlineplus/ency/article/003188.htm

I'm currently being tested for MS but for the past 2 months my left shoulder has been getting smaller.

At this point my right is the size of a grapefruit and my left is like an orange. Its noticeable even wearing a shirt, as my friends have asked me about it a few times.

I've also gotten weaker (30% less strong than right side) and it hurts from time to time but mostly numb.

My questions are:
How quickly can neurogenic atrophy happen? Meaning does reducing half its size in a little more than a month be possible?
Is it possible to still control the muscle if neurogenic atrophy was occurring or would it be immobile?

Are there any tests to see what's going on?

Submitted: 4 Days
Category: Family Physician-GP

Expert:  Dr. Jaydeep Tripathy replied 4 Days.

Hello,
Thank you for posting your query at DoctorSpring.com
I have noted your symptoms and agree that there is muscle wasting (thinning of muscles). There are several causes of muscle wasting (as mentioned in the link sent by you), which needs to be evaluated with clinical examination as well as testing.
MS would not lead to muscle wasting usually.
It is usually due to nerve or muscle disease. Tests such as NCS and EMG would help in the confirmation of diagnosis.
Yes, neurogenic atrophy leading to muscle wasting can occur within one month. Also, atrophy leads to only partial weakness rather than total weakness in most cases, so, it is possible to control the muscles.
I hope it helps.
Best wishes,
Dr. Sudhir Kumar MD (Medicine), DM (Neurology)
Senior Consultant Neurologist

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Patient replied :

Thanks for the response. Its not an optimistic answer but at least I don't need to question this anymore.
I know about EMG because I was afraid of ALS.
Lets say I do have neurogenic atrophy in my shoulder.
Does this mean at some point I'll lose my whole arm or just the muscle that's wasting away?


Expert:  Dr. Jaydeep Tripathy replied 3 Days.

Thank you for getting back.
The condition needs to be investigated to ascertain the exact cause, and the overall outcome would depend on that. Definitely, it dies not look like ALS.
Also, I do not expect you to lose the function in your arm.
Best wishes,
Dr. Sudhir Kumar MD (Medicine), DM (Neurology)
Senior Consultant Neurologist

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Patient replied :

Last question on this.
Does exercise accelerate neurogenic atrophy?


Expert:  Dr. Jaydeep Tripathy replied 2 Days.

Hello,
No, exercise will not accelerate the atrophy.
Rather some amount of exercise will be helpful.
Regards.

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