Question

Как изменилась КИСТЬ человека в процессе эволюции?

Answer 1

Насколько мне известно, главное изменение,которое позволяет нам пользоваться большим пальцем,это кость-трапеция в запястье,что позволяет большому пальцу быть относительно очень сильным и позволяет "обхватывать"предметы.
Ещё и изменение размеров костей пальцев.

Answer 2

Evolution of the Human Hand

The human hand has undergone significant changes throughout the process of evolution. These changes have allowed humans to develop fine motor skills and dexterity, enabling us to perform complex tasks and manipulate objects with precision.

1. Thumb Position and Opposability: One of the key evolutionary changes in the human hand is the position and opposability of the thumb. The thumb is positioned opposite the fingers, allowing for a strong grip and precise manipulation of objects. This opposable thumb is a unique feature of primates, including humans, and has greatly contributed to our ability to use tools and perform intricate tasks.

2. Length and Shape of Fingers: The length and shape of the fingers have also evolved over time. The fingers of early human ancestors were likely longer and more curved, resembling the hands of other primates. As humans evolved, the fingers became shorter and straighter, allowing for better control and precision in grasping objects.

3. Precision Grip: The evolution of the human hand has also led to the development of a precision grip. This grip involves the ability to hold and manipulate small objects between the thumb and fingertips. The precision grip is essential for activities such as writing, playing musical instruments, and using tools. The structure of the hand, including the length and flexibility of the fingers, has adapted to facilitate this type of grip.

4. Fine Motor Skills: The evolution of the human hand has also contributed to the development of fine motor skills. Fine motor skills involve the coordination of small muscles in the hand and fingers, allowing for precise movements. These skills are crucial for activities such as typing, sewing, and playing sports. The evolution of the human hand has provided us with the necessary anatomical features to perform these tasks effectively.

5. Reduction of Claws: Another significant change in the human hand during evolution is the reduction of claws. Early human ancestors had hands with long, curved claws, similar to those of other primates. However, as humans evolved, the claws became shorter and less prominent, eventually transforming into nails. This change allowed for better manipulation of objects and increased sensitivity in the fingertips.

In summary, the human hand has undergone several changes throughout evolution. These changes