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  1.  17
    Brain Stimulation and Conscious Experience.Daniel A. Pollen - 2004 - Consciousness and Cognition 13 (3):626-645.
    Libet discovered that a substantial duration (> 0.5-1.0 s) of direct electrical stimulation of the surface of the somatosensory cortex at threshold currents is required before human subjects can report that a conscious somatosensory experience had occurred. Using a reaction time method we confirm that a similarly long stimulation duration at threshold currents is required for activation of elementary visual experiences (phosphenes) in human subjects following stimulation of the surface of the striate cortex. However, the reaction times for the subject (...)
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    Explicit Neural Representations, Recursive Neural Networks and Conscious Visual Perception.Daniel A. Pollen - 2003 - Cerebral Cortex 13 (8):807-814.
  3.  31
    Brain Stimulation and Conscious Experience: Electrical Stimulation of the Cortical Surface at a Threshold Current Evokes Sustained Neuronal Activity Only After a Prolonged Latency.Daniel A. Pollen - 2006 - Consciousness and Cognition 15 (3):560-565.
    Libet demonstrated that a substantial duration (>0.5-1.0 s) of direct electrical stimulation of the surface of a sensory cortex at a threshold or liminal current is required before a subject can experience a percept. Libet and his co-workers originally proposed that the result could be due either to spatial and temporal facilitation of the underlying neurons or additionally to a prolonged central processing time. However, over the next four decades, Libet chose to attribute the prolonged latency for evoking conscious experience (...)
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