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Hi Dr. Mo here.
Please give me a moment to read this and reply.
It is quite common with decreased neurologic input from the brain for the muscles and the skin to have less tone.
Essentially this will show up as lower skin temperature though the temp in the core will still be in the 98 range.
It may not be worsening brain atrophy but simply the muscles degenerating with time, since they are getting less neuronal inputs.
This is common when there has been major brain injury as a child.
Our muscle tone determines our external temps, when they are exercises less they will have less heat production. We also lose muscle mass as we get older.
Have you noticed him losing more muscle mass or having less activity as well?
I am sorry, I will have another physician answer you. I will open the question up for others.
Hello, this is Dr. Love, a different expert.
The skin changes that you have noticed that precede the elevation in axillary temperatures would not be directly due to accelerated brain deterioration. It is common for impaired temperature regulation to occur with ongoing brain degeneration, but the flushing of the skin is a reflexive cooling mechanism, so further impairment of temperature regulation would cause a loss of these changes. As neurologic function deteriorates, he may have shifts in his axillary temperature that would not be explained by an infection or other apparent cause, but it is not usually manifested as skin flushing or temperature changes that precede an axillary temperature elevation that is from an infection.
However, it certainly is true that worsening neurologic function increases his risk for a variety of infections, particularly respiratory infections, and increasing incidence of infections can cause the reflexive mechanism to occur more often or be more noticeable.