Shulamite A Green1, Leanna Hernandez2, Susan Y Bookheimer2, Mirella Dapretto2. 1. Psychiatry and Biobehavioral Sciences, Semel Institute of Neuroscience and Human Behavior, University of California, Los Angeles. Electronic address: shulamite@ucla.edu. 2. Psychiatry and Biobehavioral Sciences, Semel Institute of Neuroscience and Human Behavior, University of California, Los Angeles.
Abstract
OBJECTIVE: The salience network, an intrinsic brain network thought to modulate attention to internal versus external stimuli, has been consistently found to be atypical in autism spectrum disorders (ASD). However, little is known about how this altered resting-state connectivity relates to brain activity during information processing, which has important implications for understanding sensory overresponsivity (SOR), a common and impairing condition in ASD related to difficulty downregulating brain responses to sensory stimuli. This study examined how SOR in youth with ASD relates to atypical salience network connectivity and whether these atypicalities are associated with abnormal brain response to basic sensory information. METHOD: Functional magnetic resonance imaging was used to examine how parent-rated SOR symptoms related to salience network connectivity in 61 youth (aged 8-17 years; 28 with ASD and 33 IQ-matched typically developing youth). Correlations between resting-state salience network connectivity and brain response to mildly aversive tactile and auditory stimuli were examined. RESULTS: SOR in youth with ASD was related to increased resting-state functional connectivity between salience network nodes and brain regions implicated in primary sensory processing and attention. Furthermore, the strength of this connectivity at rest was related to the extent of brain activity in response to auditory and tactile stimuli. CONCLUSION: Results support an association between intrinsic brain connectivity and specific atypical brain responses during information processing. In addition, findings suggest that basic sensory information is overly salient to individuals with SOR, leading to overattribution of attention to this information. Implications for intervention include incorporating sensory coping strategies into social interventions for individuals with SOR.
OBJECTIVE: The salience network, an intrinsic brain network thought to modulate attention to internal versus external stimuli, has been consistently found to be atypical in autism spectrum disorders (ASD). However, little is known about how this altered resting-state connectivity relates to brain activity during information processing, which has important implications for understanding sensory overresponsivity (SOR), a common and impairing condition in ASD related to difficulty downregulating brain responses to sensory stimuli. This study examined how SOR in youth with ASD relates to atypical salience network connectivity and whether these atypicalities are associated with abnormal brain response to basic sensory information. METHOD: Functional magnetic resonance imaging was used to examine how parent-rated SOR symptoms related to salience network connectivity in 61 youth (aged 8-17 years; 28 with ASD and 33 IQ-matched typically developing youth). Correlations between resting-state salience network connectivity and brain response to mildly aversive tactile and auditory stimuli were examined. RESULTS: SOR in youth with ASD was related to increased resting-state functional connectivity between salience network nodes and brain regions implicated in primary sensory processing and attention. Furthermore, the strength of this connectivity at rest was related to the extent of brain activity in response to auditory and tactile stimuli. CONCLUSION: Results support an association between intrinsic brain connectivity and specific atypical brain responses during information processing. In addition, findings suggest that basic sensory information is overly salient to individuals with SOR, leading to overattribution of attention to this information. Implications for intervention include incorporating sensory coping strategies into social interventions for individuals with SOR.
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Authors: Shulamite A Green; Jeffrey D Rudie; Natalie L Colich; Jeffrey J Wood; David Shirinyan; Leanna Hernandez; Nim Tottenham; Mirella Dapretto; Susan Y Bookheimer Journal: J Am Acad Child Adolesc Psychiatry Date: 2013-08-24 Impact factor: 8.829
Authors: Shulamite A Green; Leanna M Hernandez; Hilary C Bowman; Susan Y Bookheimer; Mirella Dapretto Journal: Dev Cogn Neurosci Date: 2017-02-21 Impact factor: 6.464
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Authors: Katherine E Lawrence; Leanna M Hernandez; Hilary C Bowman; Namita T Padgaonkar; Emily Fuster; Allison Jack; Elizabeth Aylward; Nadine Gaab; John D Van Horn; Raphael A Bernier; Daniel H Geschwind; James C McPartland; Charles A Nelson; Sara J Webb; Kevin A Pelphrey; Shulamite A Green; Susan Y Bookheimer; Mirella Dapretto Journal: Cereb Cortex Date: 2020-07-30 Impact factor: 5.357