The median nerve provides feeling and movement to the thumb side of the hand, including the palm, thumb,
index finger, middle
finger, and thumb side of the ring finger (not the little finger). Carpal tunnel syndrome can lead to numbness, tingling, weakness, or muscle damage in the hand and fingers.
You may notice numbness in the palm, thumb, index finger, middle finger, and thumb side of the ring finger;
The doctor may notice on examination that you have a weak hand grip.