Comparison of auditory and visual conditioning stimuli in delay eyeblink conditioning in healthy young adults |
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Authors: | Adam B Steinmetz Chad R Edwards Joseph E Steinmetz and William P Hetrick |
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Institution: | (1) Department of Psychological and Brain Sciences, Indiana University, 1101 East 10th Street, Bloomington, IN 47405, USA;(2) Department of Psychiatry, Yale School of Medicine, 300 George Street, Suite 901, New Haven, CT 06511, USA;(3) Department of Psychology, Ohio State University, 225 Psychology Building, 1835 Neil Avenue, Columbus, OH 43210, USA; |
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Abstract: | Classical eyeblink conditioning (EBC) has been widely used to probe cerebellar function in humans and nonhuman mammals. Although
the neural pathways governing behavior in this task are well understood and fairly discrete, it remains unclear in the human
literature how conditioned stimuli (CSs) of different modalities (e.g., visual and auditory) influence the exhibition of conditioned
responses (CRs). In the present study, therefore, CRs to a visual CS and an auditory CS were examined with the single-cue
delay EBC procedure. An initial experiment (N=61) was conducted to identify visual and auditory stimuli that had equal perceived intensities. Using these perceptually
equivalent stimuli, a second group of 25 subjects completed auditory and visual EBC procedures in two testing sessions 5–8
days apart. Whereas the acquisition of CRs was similar between the CS modality conditions, the timing of the CRs differed
such that earlier CR onset and peak latencies were associated with the visual CS. In addition, CR timing improved across testing
sessions, as indicated by the later CR peak latencies exhibited during the second testing session, as compared with the first. |
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