A method and apparatus is provided for diagnosing, assessing, or detecting brain injury and/or a neurological disorder of a subject. Objects are presented to the subject over a range of locations within the subject's workspace such that the subject can interact with at least some of the presented objects using either the right or left limb, or portion thereof, of a pair of limbs. Position data and/or motion data and/or kinetic data of the left and right limbs or portions thereof with respect to a presented object are obtained, and a data set is acquired for a plurality of presented objects. The acquired data set provides information about brain injury and/or a neurological disorder in the subject.