The dorsal interossei muscles are a group of four small muscles located in the hand. They are situated between the metacarpal bones on the back of the hand, and are part of the intrinsic muscles of the hand. The dorsal interossei muscles are responsible for the movement of the fingers, and are particularly important for helping to spread the fingers apart.

In daily life, the dorsal interossei muscles are used in a variety of activities that involve movement of the fingers, such as grasping objects, making fists, and playing musical instruments. For example, when you pick up a small object and need to adjust your grip, the dorsal interossei muscles help to spread your fingers and maintain your hold. Similarly, when you play the piano or guitar and need to move your fingers quickly and precisely, the dorsal interossei muscles help to coordinate your finger movements. Overall, the dorsal interossei muscles are important for allowing us to manipulate objects and make fine movements with our fingers.