Scissors grasp. As your baby's thumb dexterity increases, they will be able to grasp a small object such as a raisin between their thumb and the side of their curled index finger. This will happen ...

At this age the embryo, whose thumb is not yet in place, flexes its fingers if the palm is stimulated. At twelve weeks it makes “a pretty fair fist.” At 13½ weeks it opens and closes its hand ...

Injury to the median nerve can result in ape hand, a human deformity characterized by an inability to move the thumb outside the plane of the palm. Learn about symptoms, causes, and other similar ...