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"... ilit ou d v nceton ived we will focus on the role of voluntary control in the dynamics. The rationale of the slant rivalry paradigm is as fol-lows: Each of our eyes views a scene from a slightly dif-ferent position. The resulting binocular disparities ..."
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ilit ou d v nceton ived we will focus on the role of voluntary control in the dynamics. The rationale of the slant rivalry paradigm is as fol-lows: Each of our eyes views a scene from a slightly dif-ferent position. The resulting binocular disparities
1 A Common Oscillator for Perceptual Rivalries?
"... Perceptual rivalry is an oscillation of conscious experience that takes place despite unvarying, if ambiguous, sensory input. Much current interest is focused on the controversy over the neural site of binocular rivalry, a variety of perceptual rivalry for which a number of different cortical region ..."
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Perceptual rivalry is an oscillation of conscious experience that takes place despite unvarying, if ambiguous, sensory input. Much current interest is focused on the controversy over the neural site of binocular rivalry, a variety of perceptual rivalry for which a number of different cortical regions have been implicated. Debate continues over the relative role of higher levels of processing compared with primary visual cortex and the suggestion that different forms of rivalry involve different cortical areas. Here we show that the temporal pattern of disappearance and reappearance in motion-induced-blindness (MIB) (Bonneh, Cooperman, and Sagi, 2001) is highly correlated with the pattern of oscillation reported during binocular rivalry in the same individual. This correlation holds over a wide range of inter-individual variation. Temporal similarity in the two phenomena was strikingly confirmed by the effects of the hallucinogen LSD, which produced the same, extraordinary, pattern of increased rhythmicity in both kinds of perceptual oscillation. Furthermore, MIB demonstrates the two properties previously considered characteristic of Binocular rivalry. Namely the distribution of dominance periods can be approximated by a gamma distribution and, in line with Levelt’s second proposition of binocular rivalry, predominance of one perceptual phase can be 2 increased through a reduction in the predominance time of the opposing phase. We conclude (i) that MIB is a form of perceptual rivalry and (ii) there may be a common oscillator responsible for timing aspects of all forms of perceptual rivalry. 1.
fMRI responses to Jung’s Word Association Test: implications for theory, treatment and research1
"... Abstract: Jung’s Word Association Test was performed under fMRI conditions by 12 normal subjects. Pooled complexed responses were contrasted against pooled neutral ones. The fMRI activation pattern of this generic ‘complexed response ’ was very strong (corrected Z scores ranging from 4.90 to 5.69). ..."
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Abstract: Jung’s Word Association Test was performed under fMRI conditions by 12 normal subjects. Pooled complexed responses were contrasted against pooled neutral ones. The fMRI activation pattern of this generic ‘complexed response ’ was very strong (corrected Z scores ranging from 4.90 to 5.69). The activation pattern in each hemisphere includes mirror neurone areas that track ‘otherness ’ (perspectival empathy), anterior insula (both self-awareness and emotional empathy), and cingulated gyrus (self-awareness and conflict-monitoring). These are the sites described by Siegel and colleagues as the ‘resonance circuitry ’ in the brain which is central to mindfulness (awareness of self) and empathy (sense of the other), negotiations between self aware-ness and the ‘internal other’. But there is also an interhemispheric dialogue. Within 3 seconds, the left hemisphere over-rides the right (at least in our normal subjects). Mindfulness and empathy are central to good psychotherapy, and complexes can be windows of opportunity if left-brain hegemony is resisted. This study sets foundations for further research: (i) QEEG studies (with their finer temporal resolution) of complexed responses in normal subjects (ii) QEEG and fMRI studies of complexed responses in other conditions, like schizophrenia, PTSD, disorders of self organization.
Word count: 80,885
, 2011
"... The author acknowledges her supervisors for their excellence. In addition she wishes to express special thanks to the following persons: neuropsychologist Michael I. Posner, whose example, work, and discussion assisted in the conceptual development of my research; neurophysiologist Michael E. Goldbe ..."
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The author acknowledges her supervisors for their excellence. In addition she wishes to express special thanks to the following persons: neuropsychologist Michael I. Posner, whose example, work, and discussion assisted in the conceptual development of my research; neurophysiologist Michael E. Goldberg who assisted in the development of my animation about inattention blindness; Michael Steinberg and Ronald Feldman for allowing me to conduct my art experiments in their gallery spaces; Paul Sultan for his programming skills; and neurologist David E. Levy for his thoughtful insights and invaluable support.
Elsevier Science 1 Running Head: Illusory motion reversals
"... Illusory motion reversals from unambiguous motion with visual, proprioceptive, and tactile stimuli ..."
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Illusory motion reversals from unambiguous motion with visual, proprioceptive, and tactile stimuli
Perceptual Rivalry as an Ultradian Oscillation.
"... Perceptual rivalry alternations are switches in perception that occur despite a constant, if ambiguous, sensory input. Whilst being clearly and predictably ..."
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Perceptual rivalry alternations are switches in perception that occur despite a constant, if ambiguous, sensory input. Whilst being clearly and predictably
