Fine motor skill
Fine motor skills, or simply dexterity, was the ability to manipulate an object with one's hand and fingers.

When Doctor Phlox was given the assignment by Captain Jonathan Archer of purging the osmotic filters aboard  while wearing an EV suit in 2152, Archer explained that operating the valves was normally not a problem, but his wearing EV gloves to perform the task might make it more difficult. Phlox assured Archer than back on Denobula, he was known for his fine motor skills, and doubted a pair of gloves would deter him. ()

In 2372, while stripping The Clown of a scalpel he meant to harm Harry Kim with, The Doctor mentioned that he was holding the instrument incorrectly, having positioned his index finger in such a way that allowed for less dexterity. ()

External link 
 
Physiology