Apraxia, metaphor and mirror neurons

Medical Hypotheses
Paul D McGeochVilayanur Subramanian Ramachandran

Abstract

Ideomotor apraxia is a cognitive disorder in which the patient loses the ability to accurately perform learned, skilled actions. This is despite normal limb power and coordination. It has long been known that left supramarginal gyrus lesions cause bilateral upper limb apraxia and it was proposed that this area stored a visual-kinaesthetic image of the skilled action, which was translated elsewhere in the brain into the pre-requisite movement formula. We hypothesise that, rather than these two functions occurring separately, both are complementary functions of chains of "mirror neurons" within the left inferior parietal lobe. We go on to propose that this neural mechanism in the supramarginal gyrus and its projection zones, which originally evolved to allow the creation of a direct map between vision and movement, was subsequently exapted to allow other sorts of cross-domain mapping and in particular those sorts of abstract re-conceptualisation, such as metaphor, that make mankind unique.

References

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Apr 25, 2000·Brain : a Journal of Neurology·R C Leiguarda, C D Marsden
Oct 29, 2003·Diabetes Research and Clinical Practice·A Ramachandran
Apr 30, 2005·Science·Leonardo FogassiGiacomo Rizzolatti
Nov 2, 2006·Scientific American·Vilayanur Subramanian Ramachandran, Lindsay M Oberman

Citations

Dec 17, 2009·The Australian and New Zealand Journal of Psychiatry·C Robert Cloninger
Jun 20, 2008·Journal of Cognitive Neuroscience·Ricarda I Schubotz, D Yves von Cramon
Jan 15, 2010·Brain and Language·Alexander M RappW Grodd
Mar 5, 2016·Journal of Cognitive Neuroscience·Silvi Frenkel-ToledoNachum Soroker
Aug 30, 2008·Medical Hypotheses·Stephanie Ortigue, Francesco Bianchi-Demicheli
Mar 18, 2015·Scientific Reports·Chihiro SutohEiji Shimizu
Apr 26, 2018·Neurocase·Vilayanur Subramanian Ramachandran, Claudia Alyse Sellers

Related Concepts

Apraxia, Verbal
Brain
Neurons
Parietal Lobe
Apraxia, Ideomotor

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