Thanks for that quote.
Here is something I also wrote on paresthesias which answer some of the questions about how something can be numb and tingly at the same time.
A erroneous sensation from a sensory nerve causes a "paresthesia. What a lot of people don't know its that there are several different kinds of sensory nerves.
The common kinds are pain, pressure, soft touch, hot, cold, and vibration, but there are another dozen types. On top of that there are the special senses: smell, sight, taste, hearing, and such. All of them can be affected by MS.
Also nerves can be affect in two different kinds of ways. Their error messages can be positive or negative.
A POSITIVE paresthesia means that the erroroneous nerve signal will be something felt, or sensed, by the person. In the case of pain, it will be a sensation of pain from an area that is not damaged and has no reason to send a pain signal.
Hot may send a signal of a warm patch. We often perceive this as a warm, "wet" patch, but usually this wtness is filled in by our brain because it makes sense and our brains often try to make sense of things that don't add up.
A positive pressure paresthesia may show as the band sensation we often feel in the trunk or the limbs.
And, so the sense of smell by show that is, too, is wonky, by providing us with abnormal smells. Too often these are not pleasant.
Eyes may send lights, wavy lines, colors or halos.
You get the idea.
A NEGATIVE paresthesia means the nerve shows its damage by not sending the signal at all, or by sending it in reduced amplitude.
Something that is hot may just feel warm, or if the sensation is gone there is nothing to counter the cold sensors and the thing may actually feel cold.
Something may be completely without feeling or numb.
The sense of smell may be totally gone.
Taste may be gone.
So, yes, you can be missing a sensation entirely (the nerve has NO, a negative response) and/or have the sensation and be getting altered, and wrong, information (the nerve is sending a signal, a positive response) but it is altered.
Sometimes the sensation coming from the area is vastly decreased = numb, but the sensation is also altered = tingly or vibrating.
Quix
Thats an excellent bit of info there. Thanks for sharing!
Zilla*