Altered responsiveness to basic sensory input is an under-studied symptom in autism spectrum disorders (ASD) that likely has far-reaching effects on development, although these effects are not well understood. While the term """"""""sensory"""""""" typically connotes stimuli external to the body, there is copious sensory information within the body as well, including visceral and proprioceptive signals. Hypo-responsiveness to external sensory stimuli shows very strong association with core clinical symptoms, and differentiates ASD from other developmental disorders better than hyper-responsiveness. The experiments described in this project are designed to investigate possible mechanisms for this under-responsiveness, and attempts to reconcile these with growing evidence that individuals with ASD show enhanced reliance on internal sensory signals when they are in competition with external cues. We predict that basic sensory perception of internal (interoceptive) and external sensory cues will not differ in ASD, but expect differences in higher order neural networks that integrate these signals and compare competing signals for salience in order to allocate attention. The project will emphasize the salience network, comprising anterior insular and anterior cingulate cortices, which integrate both internal and external cues with limbic input to determine their relative affective significance. We hypothesize that this system is involved in excessive focus on internal sensory cues, at the expense of external input, in ASD. We further predict that the neural and behavioral correlates of enhanced attention to internal sensory input relative to external will positively relate to social deficits and sensory hypo-responsiveness in ASD. If these predictions are supported, neural differences in the salience network could serve as novel biomarkers for ASD and behavioral differences could be parlayed into improved therapeutic approaches, including mindfulness-based therapies that could capitalize on an existing strength in attending to internal sensory cues.

Public Health Relevance

This project addresses basic sensory perception, salience attribution, and attention to external and internal sensory input in ASD, with a focus on neural networks that integrate and compare these sources of input to determine allocation of attention. We predict that attention and salience networks, but not basic sensory perception, will differ in ASD in favor of more salience attribution and attentional weighting to internal signals. We also expect these differences to be predictive of sensory hypo-responsiveness and social impairment, giving these experiments the potential to elucidate a neural mechanism for ASD symptoms that is tightly linked to basic affective processing of sensory signals, which may uncover novel biomarkers for ASD.

National Institute of Health (NIH)
National Institute of Mental Health (NIMH)
Research Project (R01)
Project #
Application #
Study Section
Child Psychopathology and Developmental Disabilities Study Section (CPDD)
Program Officer
Gilotty, Lisa
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
Vanderbilt University Medical Center
Schools of Medicine
United States
Zip Code
Failla, Michelle D; Moana-Filho, Estephan J; Essick, Greg K et al. (2018) Initially intact neural responses to pain in autism are diminished during sustained pain. Autism 22:669-683
Damiano-Goodwin, Cara R; Woynaroski, Tiffany G; Simon, David M et al. (2018) Developmental sequelae and neurophysiologic substrates of sensory seeking in infant siblings of children with autism spectrum disorder. Dev Cogn Neurosci 29:41-53
Noel, Jean-Paul; Lytle, Marisa; Cascio, Carissa et al. (2018) Disrupted integration of exteroceptive and interoceptive signaling in autism spectrum disorder. Autism Res 11:194-205
Williams, Zachary J; Failla, Michelle D; Gotham, Katherine O et al. (2018) Psychometric Evaluation of the Short Sensory Profile in Youth with Autism Spectrum Disorder. J Autism Dev Disord 48:4231-4249
Mash, Lisa E; Schauder, Kimberly B; Cochran, Channing et al. (2017) Associations Between Interoceptive Cognition and Age in Autism Spectrum Disorder and Typical Development. J Cogn Educ Psychol 16:23-37
Failla, Michelle D; Peters, Brittany R; Karbasforoushan, Haleh et al. (2017) Intrainsular connectivity and somatosensory responsiveness in young children with ASD. Mol Autism 8:25
Simon, David M; Damiano, Cara R; Woynaroski, Tiffany G et al. (2017) Neural Correlates of Sensory Hyporesponsiveness in Toddlers at High Risk for Autism Spectrum Disorder. J Autism Dev Disord 47:2710-2722
Foss-Feig, Jennifer H; McGugin, Rankin W; Gauthier, Isabel et al. (2016) A functional neuroimaging study of fusiform response to restricted interests in children and adolescents with autism spectrum disorder. J Neurodev Disord 8:15
Schauder, Kimberly B; Mash, Lisa E; Bryant, Lauren K et al. (2015) Interoceptive ability and body awareness in autism spectrum disorder. J Exp Child Psychol 131:193-200
Cascio, Carissa J; Gu, Chang; Schauder, Kimberly B et al. (2015) Somatosensory Event-Related Potentials and Association with Tactile Behavioral Responsiveness Patterns in Children with ASD. Brain Topogr 28:895-903

Showing the most recent 10 out of 11 publications