Abstract: A computer mouse, for controlling the position of a cursor on a computer screen, has a main body with a cursor-positioning element and one or more switches for sending signals to a computer. The invention provides for the mouse to be mounted or worn on either the palm side or back side of the user's hand, with the cursor-positioning element and switches being operable with the hand on which the mouse is being worn, or by the user's free hand. This enables the user to wear the mouse while entering data using the computer's keyboard, and to operate the mouse while keeping both hands in close proximity to the keyboard. The invention also provides for the main body of the mouse to be articulated in two or more sections, thus permitting adjustment to enhance the user's comfort and convenient access to the cursor-positioning element and switches.