Visual neuroscience before the neuron

Visual neuroscience is considered to be a contemporary concern, based in large part on relating characteristics of neural functioning to visual experience. It presupposes a detailed knowledge of neural activity for which the neuron doctrine is a fundamental tenet. However, long before either the neuron doctrine had been advanced or the nerve cell had been described, attempts were made to estimate the dimensions of nerve fibres from measures of visual resolution. In the seventeenth century, the microscopes of Hooke and van Leeuwenhoek were unable to resolve structures as small as nerves adequately. However, it was not Hooke's microscope that led to an estimate of the dimensions of nerve fibres but his experiments on the limits of visual resolution. Hooke determined that a separation of one minute of arc was the minimum that could normally be seen. Descartes had earlier speculated that the retina consisted of the terminations of fibres of the optic nerve, and that their size defined the limits of what could be seen. Estimates of the diameters of nerve fibres were made on the basis of human visual acuity by Porterfield in 1738; he calculated the diameters of nerve fibres in the retina as one 7200th part of an inch (0.0035 mm), based on the resolution of one minute of arc as the minimum visible. In the same year, Jurin questioned the reliability of such estimates because of variations in visual resolution with different stimuli. The measurement of visual acuity was refined by Mayer in 1755, with dots, gratings, and grids used as stimuli. In the 1830s, Treviranus fused the microscopic and acuity approaches to determine the dimensions of nerve fibres. His indirect estimates of the dimensions of retinal fibres were close to those derived from microscopic observation. However, the suggestion that the retina consisted of terminations of nerve fibres influenced his detailed illustrations of its microscopic structure. Contrary to the situation that obtained after the microscopic structure of the retina had been established, a function of vision (acuity) was used to determine the dimensions of the structures (retinal elements) that were thought to mediate it.     

On abstraction and the doctrine of terms in eighteenth-century philosophy of language

The aim of this paper is to understand why empiricist philosophers of language did not try to refute the Leibniz-Beauzée argument, which questioned the genetical priority of proper names. It is shown that, within the semantic theory which underlies the empiricist doctrine, one may assume that all general terms derive from particular names, while conceding that every proper name can be etymologically traced back to the ancestor of a common noun.     

A neuroscience model of stuttering

Using motor control systems analysis and a reductionist approach, we provide a unified model of stuttering. This model views stuttering as a momentary instability in a complex multiloop control system. The model predicts the temporal conditions under which this instability will occur. Furthermore, these temporal conditions account for the efficacy of fluency-evoking maneuvers, therapy, and the variability of speech output in stutterers.     

A critique of causality in Islamic philosophy

After the problems of epistemology, the most fundamental problem of Islamic philosophy is that of causality. Causality has been studied from various perspectives. This paper endeavors first to analyze the issues of causality in Islamic philosophy and then to critique them. A sketch is provided of the history of the development of theories of causality in Islamic philosophy, with particular attention to how religious considerations came to determine the shape of the philosophical theories that were accepted. It is suggested that outstanding philosophical and theological problems that have plagued the tradition of Islamic philosophy require a new approach to the issue of causality.

The reception of western philosophy in the Lithuanian philosophy of religion

The article examines the reception of Western philosophy in Lithuanian philosophy of religion. The purpose is to show how the discourse of philosophy of religion came about in Lithuania. This branch of philosophy has been not only culturally and socially important in Lithuania, it has been significant as well for the formation and maintenance of national identity. By the same token, it also was the most developed and controversial theoretically. The first part of the article lays out the genesis of the autonomous Lithuanian philosophy of religion, though strongly influenced by the transformations in the broader context of European philosophy. For that reason it will be useful to present the ideas of the most prominent Lithuanian thinkers in the field who have successfully adopted and adapted vital trends in Western philosophy into the Lithuanian cultural and intellectual context. The second part of the article is less historical and more problematic as it deals with specific issues concerning faith, God, anthropological problems as reflected in the works of contemporary Lithuanian philosophers of religion. Only after having explored certain affiliations of Lithuanian philosophy of religion with Western thought can we state that, although the latter was the necessary precondition of the former, Lithuanian philosophy of religion does substantiate its sovereign status while correlating in an original way major cultural transformations with the changes in theoretical context, according to the specific concerns of Lithuanian society. In addition, this historical and philosophical examination aims to look at the formation of Lithuanian identity, mentality, values, their roots in the Christian tradition as well as the capacity to respond at critical historical moments.

关于另类科学哲学的思考

A prominent phenomenon in contemporary philosophy of science has been the unexpected rise of alternative philosophers of science. This article analyses in depth such alternative philosophers of science as Paul Feyerabend, Richard Rorty, and Michel Foucault, summarizing the similarities and differences between alternative philosophies of science and traditional philosophy of science so as to unveil the trends in contemporary philosophy of science. With its different principles and foundation, alternative philosophy of science has made breakthroughs in terms of its field of vision, scope, and methodology, and its relationship with science has become more humanistic and pluralistic. Attention should be given to alternative perspectives in the contemporary philosophy of science, and research should be expanded into the fields of the epistemology of science and cognitive science, the sociology of scientific knowledge and scientific anthropology, the scientific cultural philosophy, and scientific ethics.     

The doctrine of distribution

Peter Geach describes the ‘doctrine of distribution’ as the view that a term is distributed if it refers to everything that it denotes, and undistributed if it refers to only some of the things that it denotes. He argues that the notion, so explained, is incoherent. He claims that the doctrine of distribution originates from a degenerate use of the notion of ‘distributive supposition’ in medieval supposition theory sometime in the 16th century. This paper proposes instead that the doctrine of distribution occurs at least as early as the 12th century, and that it originates from a study of Aristotle's notion of a term's being ‘taken universally’, and not from the much later theory of distributive supposition. A detailed version of the doctrine found in the Port Royal Logic is articulated, and compared with a slightly different modern version. Finally, Geach's arguments for the incoherence of the doctrine are discussed and rejected.