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Comorbid Obsessive-Compulsive Disorders 

Comorbid Obsessive-Compulsive Disorders
Comorbid Obsessive-Compulsive Disorders

Bonnie P. Taylor

and Eric Hollander

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date: 13 July 2020

This chapter focuses on the overlap of repetitive, restricted, and/or stereotyped patterns of behavior, interests, and/or activities that characterize both autism spectrum disorders (ASD) and related obsessive-compulsive spectrum disorders (OCSDs) including obsessive-compulsive disorder, obsessive-compulsive personality disorder, body dysmorphic disorder, and trichotillomania. The chapter is organized as follows. First, it outlines the symptomatic commonalities in repetitive behaviors between ASD and other OCSDs. Next, it summarizes research findings related to the frequent comorbidity, similar course, and potentially overlapping genetic, neurobiological, and neuropsychological correlates across these disorders. Finally, it presents different approaches to subtyping the diverse symptoms that comprise the repetitive behavior domain. The identification of homogeneous subgroups will arm investigators with more power to uncover the unique pathogenesis that underlies each repetitive phenotype.

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