What is the pattern of development where limb buds develop before fingers and toes called?

What is the pattern of development where limb buds develop before fingers and toes called?

• A. Cephalocaudal development.
• B. Proximodistal development.
• C. Proximal-distal progression.
• D. Distal-proximal development.

Answer: (B)

Proximodistal development describes growth that moves from the body's center outward. In early development, limb buds form near the trunk and then extend outward to the hands and feet. That means the proximal parts—shoulder/arm and trunk—develop before the distal parts like fingers and toes. This is why fingers and toes appear after the limb buds have started forming. In contrast, cephalocaudal development progresses from head downward, so the head and upper body mature before the lower parts.

Proximodistal development describes growth that moves from the body's center outward. In early development, limb buds form near the trunk and then extend outward to the hands and feet. That means the proximal parts—shoulder/arm and trunk—develop before the distal parts like fingers and toes. This is why fingers and toes appear after the limb buds have started forming. In contrast, cephalocaudal development progresses from head downward, so the head and upper body mature before the lower parts.