Spatial summation properties of the human ocular following response (OFR): dependence upon the spatial frequency of the stimulus.

ABSTRACT: Ocular following responses (OFRs) are the initial tracking eye movements that can be elicited at ultra-short latency by sudden motion of a textured pattern. The OFR magnitude depends upon stimulus size, and also upon the spatial frequency (SF) of sine-wave gratings. Here we investigate the interaction of size and SF. We recorded initial OFRs in human subjects when 1D vertical sine-wave gratings were subject to horizontal motion. Gratings were restricted to elongated horizontal apertures-"strips"-aligned with the axis of motion. In Experiment 1 the SF and the height of a single strip was manipulated. The magnitude of the OFR increased with strip height up to some optimum value, while strip heights greater than this optimum produced smaller responses. This effect was strongly dependent on SF

SUBMITTER: Sheliga BM 

PROVIDER: S-EPMC3430370 | biostudies-literature | 2012 Sep

REPOSITORIES: biostudies-literature