Binocular Rivalry

Physiological studies of binocular rivalry have provided important clues to the relationship between neural activity in the brain and visual awareness.However, uncertainty about these insights has been raised by a recent study showing that the events underlying binocular rivalry occur earlier in the visual pathway than was previously thought.

The reality of the soul, its levels and actions, and its relation to the body havealways been among the most important philosophical issues, andevidence for this may be found even in the most ancient philosophicaldeliberations of the Greeks and others.In the philosophical traditions of the Islamic world as well, serious attemptshave been made to present a “science of the soul” which is in accord with thespirit of Islamic philosophical sciences. In the Transcendent Philosophy, onthe other hand, a version of science (...) of the soul has been presented whichboth justifies the concrete sphere of “the immaterial and material soul” anddescribes “the soul’s becoming and seeking for perfection”. In addition, it isfully consistent with the components and overall structure of theTranscendent Philosophy.Based on doctrines of principiality of existence, motion in substance, bodilyorigination and spiritually subsistence of the soul, Mulla Sadra depicts man’ssoul and its station in such a way which is free from usual inconsistencies ofphilosophical traditions in this regard. At the same time, based on the Bookand tradition, he opens a new window to man’s existence through which theexistential dimensions of man are seen in correspondence and as beingsimilar to the whole cosmos. Though, in this way, Mulla Sadra has madeuses of the Peripatetic and Illuminationist traditions of his forerunners, hisown innovations are unrivalled and exceptionally strong. (shrink)

Nikos K. Logothetis University of Manchester, Manchester, UK In binocular rivalry, the visual percept alternates stochastically between two dichoptically presented stimuli. It is established that both processes related to the eye of origin and binocular, stimulus-related processes account for these fluctuations in conscious perception. Here we studied how their relative contributions vary over time. We applied brief disruptions to rivalry displays, concurrent with an optional eye swap, at varying time intervals after one stimulus became visible (dominant). We found that early (...) in a dominance phase the dominant eye determined the percept by stabilizing its own contribution (regardless of the stimulus), with an additional yet weaker stabilizing contribution of the stimulus (regardless of the eye). Their stabilizing contributions declined in parallel with time so that late in a dominance phase the stimulus (and in some cases also the eye-based) contribution turned negative, favoring a perceptual (or ocular) switch. Our findings show that depending on the time, first processes related to the eye of origin and then those related to the stimulus can have a greater net influence on the stability of the conscious percept. Their co-varying change may be due to feedback from image- to eyeof-origin representations. (shrink)

Among psychologists and vision scientists,binocular rivalry has enjoyed sustainedinterest for decades dating back to the 19thcentury. In recent years, however, rivalry''saudience has expanded to includeneuroscientists who envision rivalry as a tool for exploring the neural concomitants ofconscious visual awareness and perceptualorganization. For rivalry''s potential to berealized, workers using this tool need toknow details of this fascinating phenomenon,and providing those details is the purpose ofthis article. After placing rivalry in ahistorical context, I summarize major findingsconcerning the spatial characteristics and thetemporal dynamics (...) of rivalry, discuss two majortheoretical accounts of rivalry ( eye vs stimulus rivalry) and speculate on possibleneural concomitants of binocular rivalry. (shrink)

Rivalry is an attempt to understand facets of entrepreneurial societies by integrating the economic analysis with historical, political and psychological considerations, customarily shunned by economists. The author argues that decisions to make new business ventures, and readiness to take risks are both related to concepts of ranking hierarchies on local, national or international levels. He then constructs a theory of business enterprise and of rivalry supported by evidence on entrepreneurship, innovation, advertising, all examined with their historical, political or organisational concerns. (...) This notion of rivalry among businessmen is used to derive guidelines for anti-trust legislation. Instead of pricing, profitability, concentration ratios and other criteria used today to infer non-competitive behaviour, he suggests using a measure of a firm's relative rate of innovation to infer it. By extending the notion of rivalry to the political sphere, national and international, guidelines are derived to evaluate the performance of state-owned enterprises and to examine policies related to free trade. (shrink)

pt. 1. [without special title] -- pt. 2. The eternal world drama.

Binocular rivalry provides a useful situation for studying the relation between the temporal flow of conscious experience and the temporal dynamics of neural activity. After proposing a phenomenological framework for understanding temporal aspects of consciousness, we review experimental research on multistable perception and binocular rivalry, singling out various methodological, theoretical, and empirical aspects of this research relevant to studying the flow of experience. We then review an experimental study from our group explicitly concerned with relating the temporal dynamics of rivalrous (...) experience to the temporal dynamics of cortical activity. Drawing attention to the importance of dealing with ongoing activity and its inherent changing nature at both phenomenological and neurodynamical levels, we argue that the notions of recurrence and variability are pertinent to understanding rivalry in particular and the flow of experience in general. (shrink)

_From Soul to Self_ takes the reader on a fascinating journey through philosophy, theology, religious studies, and physiological sciences. Each of the essays, drawn from a number of different fields, focuses on the idea of the soul and of our sense of ourselves. A stellar line-up of authors explore the relationship between a variety of ideas that have arisen in philosophy, religion and science, each idea seeking to explain why we think that we as individuals are somehow distinct and unique. (...) Contributors: Richard Sorabji, Anthony Kenny, Kallistos Ware, Peter Riviere, Gary Matthews, Susan Greenfield, Galen Strawson. (shrink)

From Soul to Self takes the reader on a fascinating journey through philosophy, theology, religious studies, and physiological sciences. Each of the essays, drawn from a number of different fields, focuses on the idea of the soul and of our sense of ourselves. A stellar line-up of authors explore the relationship between a variety of ideas that have arisen in philosophy, religion and science, each idea seeking to explain why we think that we as individuals are somehow distinct and unique. (...) Contributors: Richard Sorabji, Anthony Kenny, Kallistos Ware, Peter Riviere, Gary Matthews, Susan Greenfield, Galen Strawson. (shrink)

From Soul to Self takes us on a fascinating journey through philosophy, theology, religious studies and physiological sciences. The contributors explore the relationship between a variety of ideas that have arisen in philosophy, religion and science, each idea seeking to explain why we think we are somehow unique and distinct.