Alyson Kishi Rose Hills
Stereopsis and Motor Control in a Prehension Task
Precise and coordinated motor movement, such as prehension, is an essential skill for completing everyday tasks. The aim of this study is to quantify the relationship between stereopsis (the ability to see depth) and skilled prehension (the ability to precisely grasp an object). We present objects in a frontal view that minimizes other cues to their shape and ask participants to reach and pick up the objects while recording their hand movements. Because grasping an object relies on 3-dimensional object properties and relative disparity, we predict that individuals with anomalous depth perception will have impaired ability to grasp objects. Thus, in a subset of the larger study, stereo-anomalous participants will undergo perceptual learning training using virtual reality games to observe any possible recovered stereopsis and improved motor movement. It is our ultimate hope that the study will illuminate our understanding of how stereopsis benefits manual tasks and provide a basis for therapies that improve binocular function and depth perception.