Viewing another person's body as a target object: a behavioural and PET study of pointing

Neuropsychologia
Laurent Cleret de LangavantA C Bachoud-Levi

Abstract

Humans usually point at objects to communicate with other persons, although they generally avoid pointing at the other's body. Moreover, patients with heterotopagnosia after left parietal damage cannot point at another person's body parts, although they can point at objects and at their own body parts and although they can grasp the others' body parts. Strikingly, their performance gradually improves for figurative human body targets. Altogether, this suggests that the body of another real person holds a specific status in communicative pointing. Here, we test in healthy individuals whether performance for communicative pointing is influenced by the communicative capacity of the target. In Experiment 1, pointing at another real person's body parts was compared to pointing at objects, and in Experiment 2, the person was replaced by a manikin. While reaction times for pointing at objects were shorter compared to pointing at other person's body parts, they were similar for objects and manikin body parts. By adapting Experiment 1 to PET-scan imaging (Experiment 3), we showed that, compared to pointing at objects, the brain network for pointing at other person's body parts involves the left posterior intraparietal sulcus, lesion of ...Continue Reading

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Citations

Feb 19, 2015·Developmental Medicine and Child Neurology·Alain Berthoz, Mohamed Zaoui
Dec 30, 2014·Frontiers in Psychology·François Quesque, Yann Coello
Jul 26, 2013·The Behavioral and Brain Sciences·Laurent Cleret de LangavantEmmanuel Dupoux
Sep 7, 2016·Cognitive Neuropsychology·Laurent Cleret de LangavantAnne-Catherine Bachoud-Lévi
Aug 8, 2015·Socioaffective Neuroscience & Psychology·Francois Quesque, Yann Coello
Jun 27, 2018··Alain BerthozSimon Lambrey

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