DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Muscle wasting. Hand of a 57-year-old man showing wasting of muscles around the thumb (upper centre to upper left). This can result from damage to the nerves, or extended inactivity. The bones of the thumb appear unusually prominent due to loss of muscle tissue between them, with the large fleshy pad at the base of the thumb (thenar prominence) being especially affected.
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