Introduction

There are many interesting aspects of timing and time perception in living animals. It goes without saying that timing is one of the most important properties of behavior. The behavioral output from the brain always includes timing mechanisms. The brains of animals process many sensory inputs from the environment through the eyes, ears, nose, mouth, and skin and control the timing of these sensory processes. Where are the primary regions in the brain for processing this sensory input and making decisions about timing? The purpose of this study is to evaluate the roles of various brain regions in timing and time perception using electrophysiological field potentials. The foci of interest in these experiments are the frontal cortex, hippocampus, and cerebellum. These brain areas correspond to the major components of the information-processing model of scalar timing theory proposed by Gibbon et al. (1984) as well as the neuropsychological findings of Ivry and his colleagues (e.g., Diedrichsen et al., this volume). A version of the information-processing model of

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