In a botanical context, "thumb" often refers to a gardener's skill (a "green thumb") or the maturity stages of a plant. How Old Do You Text? Guess My Age Challenge with iPhone
: Typically use both thumbs for high-speed typing or a single thumb for "swiping". mature and young thumbs
: Research indicates that the articular surfaces of the thumb carpometacarpal (CMC) joint become flatter and more conforming with age. Mature thumbs are more likely to develop osteoarthritis (OA) , which further alters bone curvature compared to the healthier, more curved surfaces of young thumbs. In a botanical context, "thumb" often refers to
: Young thumbs in children contain growth plates (physes) made of cartilage, which are responsible for lengthening the bone. As an individual matures, these plates calcify or "close," and the bones reach their adult size and shape. : Research indicates that the articular surfaces of
The transition from a "young thumb" to a "mature thumb" involves significant physical remodeling and shifts in behavioral use, whether in human anatomy or gardening terminology. Anatomical and Behavioral Differences