The relations between cognitive and motivational components of anosognosia for left-sided hemiplegia and the right hemisphere dominance for emotions: A historical survey |
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| Affiliation: | 1. Social Neuroscience Laboratory, Department of Psychology, Sapienza University, Rome, Italy;2. NPSY.Lab-Vr, Department of Human Sciences, University of Verona, Italy;3. Department of Rehabilitation, Sacro Cuore-Don Calabria Hospital, Negrar, Verona, Italy;1. Department of Psychology, The Hebrew University of Jerusalem, Jerusalem 91905, Israel;2. Loewenstein Rehabilitation Hospital, Raanana, and Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel;3. Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem 91905, Israel;1. Department of Psychology, University of the Witwatersrand, South Africa;2. CIFAR Azrieli Global Scholars Program, CIFAR, Toronto, Canada;3. Institute for Social Neuroscience, Melbourne, Australia;4. Institute of Psychiatry, Psychology and Neuroscience, King''s College London, UK;5. Neuroscience Institute, University of Cape Town, South Africa;6. Department of Human Sciences, University of Verona, Italy;7. IRCSS Sacro Cuore Don Calabria, Negrar, Verona, Italy;8. Research Department of Clinical, Educational and Heath Psychology, University College London, UK |
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| Abstract: | Since the description of anosognosia for hemiplegia by Babinski (who also stressed the links between anosognosia and right hemisphere damage) both motivational and cognitive mechanisms have been advanced to explain this awareness disorder. In this review I will discuss first the neurophysiological mechanisms that can impede the discovery of the motor deficits contralateral to the brain lesion and then suggest that some instances of anosognosia for left-sided hemiplegia may also be due to motivational mechanisms of denial. Among the cognitive mechanisms, sensory feedback and intentional feed-forward disorders can lead to a poor awareness of the motor defects, whereas denial mechanisms could result from an interaction between the right hemisphere dominance for emotions and the anxiety raised by the catastrophic consequences of the brain damage. In particular, a maladaptive reaction to the personal implications of the brain lesion could be revealed by the presence of an implicit acknowledgement of the motor defect. |
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| Keywords: | Right hemisphere Unawareness and denial of hemiplegia Sensory feedback and intentional feed-forward mechanisms Emotion regulation |
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