Fig. 1From: A method for using one finger to press three separate keys on a three-dimensional keyboard designed to be mounted on a mouseProposed 3-D key areas for pressing three keys with one finger through flexion. The findings are based on finger motions constructed by combining two finger joints (MCP and PIP) and two directions of motion (flexion and extension). a Eight finger-motion types constructed by combining two finger joints and two directions of motion, b finger-motion types for pressing the upper, middle, and lower keys on a standard keyboard, c proposed 3-D key areas for pressing three keys with one finger through flexionBack to article page