Face processing in 22q11.2 deletion syndrome: atypical development and visual scanning alterations

Journal of Neurodevelopmental Disorders
Alexandra ZahariaStephan Eliez

Abstract

Previous research links social difficulties to atypical face exploration in 22q11.2 deletion syndrome (22q11.2DS). Two types of face processing are distinguished: configural (CFP) and featural (FFP). CFP develops later in life and plays an important role in face and emotion recognition abilities. Recent studies reported atypical development of CFP in several neurodevelopmental disorders. Taking previous reports of atypical face exploration one step further, our study aims at characterizing face processing in children and adolescents with 22q11.2DS. First, we sought to identify biases in the first two fixation positions on faces and to detect differences between CFP and FFP in 22q11.2DS using eye-tracking technology. Second, we investigated the developmental trajectories of CFP and FFP using accuracy data from follow-up evaluation. Seventy-five individuals with 22q11.2DS and 84 typically developed (TD) individuals (aged 6-21 years) completed a discrimination task ("Jane task") inducing CFP and FFP in an eye-tracking setting. Thirty-six individuals with 22q11DS and 30 TD from our sample completed a longitudinal follow-up evaluation. Findings revealed that individuals with 22q11.2DS demonstrate an early bias toward the mouth regio...Continue Reading

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Feb 12, 2021·Current Opinion in Genetics & Development·Raquel E GurRuben C Gur
Nov 15, 2020·Journal of Neurodevelopmental Disorders·Maude SchneiderInez Myin-Germeys

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22q11 Deletion Syndrome

22q11.2 deletion syndrome, also known as DiGeorge syndrome, is a congenital disorder caused by a partial deletion of chromosome 22. Symptoms include heart defects, poor immune system function, a cleft palate, complications related to low levels of calcium in the blood, and delayed development. Discover the latest research on this disease here.