palm

You never know what is enough unless you know what is more than enough. —William Blake To anyone engaged in a skill requiring dexterity—surgery, drawing, and of course playing a musical instrument—the use of the thumb is crucial to successful execution. Thumb-finger opposition is one of the primary characteristics which distinguishes primates from other animals, allowing them to manipulate tools; in humans this potential exists at the highest levels, facilitating the development of skills which make extraordinary use of the hand...witness the moto perpetuo.  We also have expressions to describe this relationship when it doesn't work well: "He/she is all thumbs!" To enable this thumb—finger opposition, there is a considerable amount of brain space devoted to the fleshy area of the thumb between the base joint of the thumb (located at [...]