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Title: Knowing how to do it or doing it? A double dissociation between tool-gesture production and tool-gesture knowledge
Authors: Valério, Daniela 
Santana, Isabel 
Sousa, Diana Aguiar de
Schu, Guilherme 
Leal, Gabriela
Pavão Martins, Isabel
Almeida, Jorge 
Keywords: Apraxia; Tool-gesture production; Tool-gesture knowledge; Object processing; Cortical thickness
Issue Date: 2021
Publisher: Elsevier
Project: TDC/MHC-PCN/6805/2014 
info:eu-repo/grantAgreement/EC/H2020/802553/EU/Contentotopic mapping: the topographical organization of object knowledge in the brain 
Serial title, monograph or event: Cortex
Abstract: Deciding how to manipulate an object to fulfill a goal requires accessing different types of object-related information. How these different types of information are integrated and represented in the brain is still an open question. Here, we focus on examining two types of object-related information–tool-gesture knowledge (i.e., how to manipulate an object), and tool-gesture production (i.e., the actual manipulation of an object). We show a double dissociation between tool-gesture knowledge and tool-gesture production: Patient FP presents problems in pantomiming tool use in the context of a spared ability to perform judgments about an object's manipulation, whereas Patient LS can pantomime tool use, but is impaired at performing manipulation judgments. Moreover, we compared the location of the lesions in FP and LS with those sustained by two classic ideomotor apraxic patients (IMA), using a cortical thickness approach. Patient FP presented lesions in common with our classic IMA that included the left inferior parietal lobule (IPL), and specifically the supramarginal gyrus, the left parietal operculum, the left premotor cortex and the left inferior frontal gyrus, whereas Patient LS and our classic IMA patients presented common lesions in regions of the superior parietal lobule (SPL), motor areas (as primary somatosensory cortex, premotor cortex and primary motor cortex), and frontal areas. Our results show that tool-gesture production and tool-gesture knowledge can be behaviorally and neurally doubly dissociated and put strong constraints on extant theories of action and object recognition and use.
Description: Valério, D et al., Knowing how to do it or doing it? A double dissociation between tool-gesture production and tool-gesture knowledge, Cortex,
ISSN: 00109452
DOI: 10.1016/j.cortex.2021.05.008
Rights: embargoedAccess
Appears in Collections:I&D CNC - Artigos em Revistas Internacionais
FPCEUC - Artigos em Revistas Internacionais
FMUC Medicina - Artigos em Revistas Internacionais
I&D CINEICC - Artigos em Revistas Internacionais

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