It is suggested that itch,like pain,may be a “gated” system where signals from other nerve cells can interfere with the feeling.Scratching the skin near,but not directly on,the spot that itches often provides relief,just as rubbing an aching arm can reduce pain.
As with some kinds of pain,small reminders of an itching feeling can get people scratching,often without being entirely aware of it.“I give lectures about itching,”Dr.Giesler said,“and I’ll stand up there in front of a whole roomful of people,show a few slides and pretty soon I’ll look out and 90 percent of the audience is scratching.”
Dr.Yosipovitch said there was a long way to go before doctors could expect treatments.For one thing,the miserable,chronic itch common in many medical problems most likely involves other mechanisms (机制).“But I feel excited about this finding,”he said.“It’s a sign that this field is really evolving.”
5.The new study shows that________.
A.scratching to relieve an itch remains a vast mystery
B.scratching seems to calm the nerves and therefore relieve itches
C.scratching can be an effective treatment for all itches
D.the relief of the stimulation is centered in the brain
6.Researchers have always overlooked the biology of the itch because________.
A.they consider it of no medical value
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