Different patterns of confabulation in left visuo-spatial neglect
Exp Brain Res. 2018-05-09; 236(7): 2037-2046
DOI: 10.1007/s00221-018-5281-8
Lire sur PubMed
Dalla Barba G(1)(2)(3)(4), Brazzarola M(4), Barbera C(4), Marangoni S(4), Causin F(5), Bartolomeo P(6), Thiebaut de Schotten M(7)(8)(9).
Author information:
(1)INSERM, Paris, France.
(2)Institut de la Mémoire et de la Maladie d’Alzheimer (IM2A), Département de
Neurologie, Hôpital de la Pitié-Salpêtrière, Sorbonne Université, Paris, France.
(3)Dipartimento di Scienze della Vita, Università degli Studi di Trieste,
Trieste, Italy.
(4)Centro Medico di Foniatria, Unità Operativa Complessa di Riabilitazione
Neurocognitiva, Padova, Italy.
(5)Azienda Ospedaliera di Padova, Unità Operativa Complessa di Neuroradiologia,
Padova, Italy.
(6)Inserm U 1127, CNRS UMR 7225, Sorbonne Université, Institut du Cerveau et de
la Moelle épinière, ICM, Hôpital de la Pitié-Salpêtrière, 47 Boulevard de
l’Hôpital, CS 21414, 75646, Paris Cedex 13, France. .
(7)Inserm U 1127, CNRS UMR 7225, Sorbonne Université, Institut du Cerveau et de
la Moelle épinière, ICM, Hôpital de la Pitié-Salpêtrière, 47 Boulevard de
l’Hôpital, CS 21414, 75646, Paris Cedex 13, France.
(8)Brain Connectivity Behaviour group, Sorbonne Universities, Paris, France.
(9)Groupe d’Imagerie Neurofonctionnelle, Institut des Maladies
Neurodégénératives-UMR 5293, CNRS, CEA University of Bordeaux, Bordeaux, France.
Confabulating patients produce statements and actions that are unintentionally incongruous to their history, background, present and future situation. Here we present the very unusual case of a patient with right hemisphere damage and signs of left visual neglect, who, when presented with visual stimuli, confabulated both for consciously undetected and for consciously detected left-sided details. Advanced anatomical investigation suggested a disconnection between the parietal and the temporal lobes in the right hemisphere. A disconnection between the ventral cortical visual stream and the dorsal fronto-parietal networks in the right hemisphere may contribute to confabulatory behaviour by restricting processing of left-sided stimuli to pre-conscious stages in the ventral visual stream.