Abstract
Eye-hand tracking of moving visual objects in three-dimensional (3D) space is common in the behavioral repertoire of primates. However, behavioral and/or neurophysiological studies of this function are lacking mainly because devices do not exist that allow its investigation. We describe a device by which a spot of light can be presented in the immediate extrapersonal space of a subject and can be moved in various trajectories in 3D space. The target is a real image of a circular aperture produced by a system consisting of a light source, aperture, filters, several lenses and fold mirros, and a large concave mirror to focus the final real image. Rapid, computer-controlled movement of the image is obtained by tilting a gimbal-mounted guide mirror (for x and y motion) and by translating a lens (for motion in the z direction). A second configuration of the system allows movement of a 3D image in the 3D space. Hand motion is monitored by means of a sonic, 3D, position-measurement system.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 135-140 |
| Number of pages | 6 |
| Journal | Journal of Neuroscience Methods |
| Volume | 62 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Nov 1995 |
Bibliographical note
Funding Information:We greatly appreciate the assistance of A. Szpak, C. Stuller, and L.J. Adams. This research was sponsored by the National Institutes of Health under Grant NS-07226 and NS-17413.
Keywords
- Motor cortex
- Movement
- Psychophysics