What is the significance of the great mobility of the hand and the position of the thumb in the process of human evolution

The human hand is a highly specialized structure. It consists of numerous articulating bones connected by a strong ligamentous apparatus into a vaulted formation. The brush is both very durable and flexible. Numerous muscles provide not only greater mobility, but also the variety, speed and accuracy of movements. The human wrist is more developed than that of the anthropoids, although the hand due to the phalanges is generally shorter. The limited and insignificant movements between the bones of the wrist in total give it greater plasticity necessary for labor movements of the hand as a working body. Greater mobility of the first finger and the ability to oppose the rest of the fingers, including the little finger, are provided by the saddle shape of the first carpal-metacarpal joint. The function of the first finger is so important that, when lost, its hand almost ceases to be an organ of labor.

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