Knowing how to do it or doing it? A double dissociation between tool-gesture production and tool-gesture knowledge

Deciding how to manipulate an object fulfill a goal requires accessing different types of object-related information. How these information are integrated and represented in the brain is still open question. Here, we focus on examining two information–tool-gesture knowledge (i.e., object), tool-gesture production actual manipulation object). We show double dissociation between production: Patient FP presents problems pantomiming tool use context spared ability perform judgments about object's manipulation, whereas LS can pantomime use, but impaired at performing judgments. Moreover, compared location lesions with those sustained by classic ideomotor apraxic patients (IMA), using cortical thickness approach. presented common our IMA that included left inferior parietal lobule (IPL), specifically supramarginal gyrus, operculum, premotor cortex frontal regions superior (SPL), motor areas (as primary somatosensory cortex, cortex), areas. Our results be behaviorally neurally doubly dissociated put strong constraints extant theories action recognition use.