The thumb is the first digit of the hand, next to the index finger, and the only one that is opposable to the other four fingers. Learn about the thumb's anatomy, function, and how it evolved in humans and other primates. · The thumb is one of five digits on the hand, but it has a different shape and function from the other four fingers. Learn about the thumb's anatomy, role, and common problems that affect its movement and dexterity. · From a scientific standpoint, the thumb is considered a digit, and therefore a type of finger. Anatomists refer to the thumb as the “first digit” or “pollex.” Most medical professionals classify the thumb as a finger, acknowledging its unique characteristics within the broader category of digits. · A thumb is a digit, but not technically a finger. Many people don’t make the distinction between thumbs and other digits. How many fingers do you have? Your answer might depend on whether you consider your thumb to be a finger. Let’s look into whether or not you can accurately call your thumb a finger. · While most people count four fingers and one thumb, anatomists categorize the thumb as a digit, the broader biological term encompassing all five appendages. The answer depends on whether one uses the precise language of skeletal anatomy or the functional vocabulary of everyday conversation. · While the thumb possesses unique properties that set it apart from the other fingers, its fundamental structure and function definitively place it within the finger category. · Fingers are defined as digits that extend from the palm of the hand, which is why the thumb is considered a finger. Each finger has three bones except for the thumb which only has two; the thumb is missing the middle bone.
