A neurologist presents evidence for locating the unconscious--Freud's concept--within the actual physiology of the brain, in a study that explains current knowledge about perception, memory, sleep, dreams, and Freud's theory of the unconscious.

Evidence that led to the hypothesis of a backwards referral of conscious sensory experiences in time, and the experimental tests of its predictions, is summarized. Criticisms of the data and the conclusion by Churchland that this hypothesis is untenable are analysed and found to be based upon misconceptions and faulty evaluations of facts and theory. Subjective referral in time violates no neurophysiological principles or data and is compatible with the theory of "mental" and "physical" correspondence.

"Eco wittily and enchantingly develops themes often touched on in his previous works, but he delves deeper into their complex nature... this collection can be read with pleasure by those unversed in semiotic theory." —Times Literary Supplement.

First published in 1980. Routledge is an imprint of Taylor & Francis, an informa company.

The cerebral cortex is a rich and diverse structure that is the basis of intelligent behavior. One of the deepest mysteries of the function of cortex is that neural processing times are only about one hundred times as fast as the fastest response times for complex behavior. At the very least, this would seem to indicate that the cortex does massive amounts of parallel computation.This paper explores the hypothesis that an important part of the cortex can be modeled as a (...) connectionist computer that is especially suited for parallel problem solving. The connectionist computer uses a special representation, termed value unit encoding, that represents small subsets of parameters in a way that allows parallel access to many different parameter values. This computer can be thought of as computing hierarchies of sensorimotor invariants. The neural substrate can be interpreted as a commitment to data structures and algorithms that compute invariants fast enough to explain the behavioral response times. A detailed consideration of this model has several implications for the underlying anatomy and physiology. (shrink)

The word “real” (from the Latin “res” = thing) was coined in the 13th century to signify “having Properties” (Pierce. 1958, p. 358), whereas a “model” refers to an analogical representation, the structure of which should correspond to the structure or properties of that which it represents. For Scudder the mind is a system of models and each mind develops different models. We all have a different reality in mind and so we each live in a slightly different world (Scudder, (...) 1975). Hence the real nature of the model and the model nature of reality are often indistinguishable. A snail, for example, when exposed to four tactile stimuli per second (with a rod on his belly) will be compelled to crawl upon that non-existing coherent spatial surface (Brecher, 1966). For the snail four tactile stimuli per second correspond to, or are isomorphic with, the structure of a spatial surface, but it is impossible for the snail to “know” which of the two structures is real. (shrink)

German description: Descartes' Meditationen von 1641 haben bis heute die philosophische Reflexion immer wieder herausgefordert. In diesem Werk geht er von einer Haltung radikalen Zweifels aus, macht dann aber geltend, dass selbst ein ausserster Skeptizismus nicht die fundamentale Wahrheit, dass ich existiere, in Frage stellen kann: ego sum, ego existo. Ausgehend von dieser Gewissheit versucht Descartes, die Grundlagen einer neuen Wissenschaft zu legen. Ursprunglich auf Lateinisch verfasst, wurden die Meditationes 1647 ins Franzosische ubersetzt. Diese Ubersetzung wurde von Descartes selbst durchgesehen (...) und bearbeitet und unterscheidet sich in vielen Nuancen vom lateinischen Original. Diese Ausgabe ist die einzige, die neben der neuen Ubersetzung ins Deutsche den lateinischen Text wie auch die franzosische Version bietet. Erganzt wird sie durch einen umfangreichen Kommentar. Sie eignet sich damit besonders als Arbeitsbuch fur Studenten. (shrink)

. Ably marshalling ideas from theology, philosophy, and neurology, personality theorist Joseph F. Rychlak criticizes mechanistic psychologists' neglect of will and responsibility; these human qualities involve dialectically considering alternatives. I disagree with Rychlaks suggestion of fundamental mystery in the minds transcendence of the body and believe transcendent mind is intimately related to biological evolution and the brain. For example, dialectics, seen in simpler forms in lower animals, may require neural inhibition, feedback circuits, and topographic mappings. However, epistemologically speaking, neuroscientists strongly (...) need the human insights of work such as Rychlak's to understand the alternatives, in planning investigation at more microscopic levels. (shrink)