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Articles, Behavioral/Cognitive

Electrical Stimulation of the Human Homolog of the Medial Superior Temporal Area Induces Visual Motion Blindness

Hubertus G. T. Becker, Thomas Haarmeier, Marcos Tatagiba and Alireza Gharabaghi
Journal of Neuroscience 13 November 2013, 33 (46) 18288-18297; DOI: https://doi.org/10.1523/JNEUROSCI.0556-13.2013
Hubertus G. T. Becker
1Departments of General Neurology and
2Cognitive Neurology, Hertie Institute for Clinical Brain Research, and
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Thomas Haarmeier
1Departments of General Neurology and
2Cognitive Neurology, Hertie Institute for Clinical Brain Research, and
5Department of Neurology, Aachen University, D-52074 Aachen, Germany
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Marcos Tatagiba
4Department of Neurosurgery, University Hospital Tübingen, 72076 Tübingen, Germany, and
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Alireza Gharabaghi
3Werner Reichardt Centre for Integrative Neuroscience, University of Tübingen, 72076 Tübingen, Germany,
4Department of Neurosurgery, University Hospital Tübingen, 72076 Tübingen, Germany, and
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Abstract

Despite tremendous advances in neuroscience research, it is still unclear how neuronal representations of sensory information give rise to the contents of our perception. One of the first and also the most compelling pieces of evidence for direct involvement of cortical signals in perception comes from electrical stimulation experiments addressing the middle temporal (MT) area and the medial superior temporal (MST) area: two neighboring extrastriate cortical areas of the monkey brain housing direction-sensitive neurons. Here we have combined fMRI with electrical stimulation in a patient undergoing awake brain surgery, to separately probe the functional significance of the human homologs, i.e., area hMT and hMST, on motion perception. Both the stimulation of hMT and hMST made it impossible for the patient to perceive the global visual motion of moving random dot patterns. Although visual motion blindness was predominantly observed in the contralateral visual field, stimulation of hMST also affected the ipsilateral hemifield. These results suggest that early visual cortex up to the stage of MT is not sufficient for the perception of global visual motion. Rather, visual motion information must be mediated to higher-tier cortical areas, including hMST, to gain access to conscious perception.

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The Journal of Neuroscience: 33 (46)
Journal of Neuroscience
Vol. 33, Issue 46
13 Nov 2013
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Electrical Stimulation of the Human Homolog of the Medial Superior Temporal Area Induces Visual Motion Blindness
Hubertus G. T. Becker, Thomas Haarmeier, Marcos Tatagiba, Alireza Gharabaghi
Journal of Neuroscience 13 November 2013, 33 (46) 18288-18297; DOI: 10.1523/JNEUROSCI.0556-13.2013

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Electrical Stimulation of the Human Homolog of the Medial Superior Temporal Area Induces Visual Motion Blindness
Hubertus G. T. Becker, Thomas Haarmeier, Marcos Tatagiba, Alireza Gharabaghi
Journal of Neuroscience 13 November 2013, 33 (46) 18288-18297; DOI: 10.1523/JNEUROSCI.0556-13.2013
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