Quill Mouse

The Quill Mouse is designed to provide the best possible posture and positioning of hand, wrist and arm. Turning the hand on its side to the natural handshake position eliminates the twisting imposed by traditional palm down pointing devices. Providing a cradle to hold the hand relaxes both hand and arm and largely eliminates the need to grip the mouse. In ergonomic terms hand and arm are in "functional neutral". 

The Quill's well designed mouse mat together with its optical system facilitates movement for pointing.