The contribution of LM to the neuroscience of movement vision

Frontiers in Integrative Neuroscience
Josef Zihl, C A Heywood

Abstract

The significance of early and sporadic reports in the 19th century of impairments of motion vision following brain damage was largely unrecognized. In the absence of satisfactory post-mortem evidence, impairments were interpreted as the consequence of a more general disturbance resulting from brain damage, the location and extent of which was unknown. Moreover, evidence that movement constituted a special visual perception and may be selectively spared was similarly dismissed. Such skepticism derived from a reluctance to acknowledge that the neural substrates of visual perception may not be confined to primary visual cortex. This view did not persist. First, it was realized that visual movement perception does not depend simply on the analysis of spatial displacements and temporal intervals, but represents a specific visual movement sensation. Second persuasive evidence for functional specialization in extrastriate cortex, and notably the discovery of cortical area V5/MT, suggested a separate region specialized for motion processing. Shortly thereafter the remarkable case of patient LM was published, providing compelling evidence for a selective and specific loss of movement vision. The case is reviewed here, along with an asse...Continue Reading

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Citations

Apr 12, 2016·PsyCh Journal·Josef Zihl, Charles A Heywood
May 20, 2016·Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists·Alfredo Ardila
Jun 27, 2017·Cognitive Neuropsychology·Michael McCloskey, Thitaporn Chaisilprungraung
Dec 7, 2016·Frontiers in Integrative Neuroscience·Bhavin R Sheth, Ryan Young

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