OBJECTIVE: To determine if individuals with obsessive-compulsive disorder (OCD) are characterized by larger eyeblink and/or autonomic responses to sudden, loud (startling) tones. METHODS: Twenty participants with OCD and 21 mentally healthy control participants were presented with 15 consecutive 95-db, 500-msec, 1000-Hz tones with 0-msec rise and fall times at the same time orbicularis oculi electromyogram (EMG), heart rate (HR), and skin conductance (SC) responses were measured. RESULTS: Participants with OCD produced larger average HR responses and a slower decline in SC responses across the 15-tone presentations. A trend for larger than average eyeblink EMG responses in participants with OCD was also observed. CONCLUSION: These results provide laboratory support for enhanced HR reactivity and a slower decline in SC responses to startling stimuli in individuals with OCD.
OBJECTIVE: To determine if individuals with obsessive-compulsive disorder (OCD) are characterized by larger eyeblink and/or autonomic responses to sudden, loud (startling) tones. METHODS: Twenty participants with OCD and 21 mentally healthy control participants were presented with 15 consecutive 95-db, 500-msec, 1000-Hz tones with 0-msec rise and fall times at the same time orbicularis oculi electromyogram (EMG), heart rate (HR), and skin conductance (SC) responses were measured. RESULTS:Participants with OCD produced larger average HR responses and a slower decline in SC responses across the 15-tone presentations. A trend for larger than average eyeblink EMG responses in participants with OCD was also observed. CONCLUSION: These results provide laboratory support for enhanced HR reactivity and a slower decline in SC responses to startling stimuli in individuals with OCD.
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Authors: Johanna M P Baas; Floris Klumpers; Mariska H Mantione; Martijn Figee; Nienke C Vulink; P Richard Schuurman; Ali Mazaheri; Damiaan Denys Journal: Front Behav Neurosci Date: 2014-09-09 Impact factor: 3.558