Biomedical subjects

O E Rössler

Publications and source records attributed to O E Rössler.

16 recordsLinked to original sources

PubMed1998

The relativist stance.

The two mindsets of absolutism and relativism are juxtaposed, and the relational or relativist stance is vindicated. The only 'absolute' entity which undeniably exists, consciousness has the reality of a dream. The escape hatch from this prison is relational, as Descartes and Levinas found out: Unfalsified relational consistency implies exteriority. Exteriority implies infinite power which in turn makes compassion inevitable. Aside from ethics as a royal way to enlightenment, a new technology called 'deep technology' may be accessible. It changes the whole world in a demonstrable fashion by manipulation of the micro frame--that is, the observer-world interface.

Information Theory↗

PubMed1997

Some remarks on the experimental realization of a mind machine.

The brain not only makes use of measuring apparatuses, but perhaps has the potential to serve as one itself. Since Einstein-Podolsky-Rosen correlations must be absent between observer and object in order for a quantum state to become reducible, it is tempting to perturb measurements by changing the quantum state of the brain. The latter would then be part of the measurement. What kind of effects would one expect? It appears that a new psychophysical problem has been opened up, since any observable consequences would be confined to the subjectivity of the observer.

Brain↗

PubMed1994

Artificial life extension. The epigenetic approach.

An epigenetic approach starts out from the direct (rather than the underlying genetic) causes. An epigenetic approach to aging has little chance of succeeding before a minimum amount of knowledge has been accumulated on the "genetic programming" that is currently believed to underlie aging. Two recent advances, one empirical and one theoretical, jointly brighten the prospect. The empirical one is the discovery that melatonin functions as an aging-controlling hormone in mammals. In 1979, Dilman and co-workers isolated a biologically active pineal extract (epithalamin) in rats which, as they later showed, stimulates melatonin production. Pierpaoli and co-workers in 1987 directly administered melatonin to mice. Both groups observed a surprising 25-percent increase of life span in conjunction with a postponed senescence. A similar effect was also achieved with an engraftment of young pineal tissue into the thymus of old mice by Pierpaoli's group. Beneficial effects of epithalamin in humans were reported by Dilman's group. The second advance is a deductive evolution-theoretical approach to aging discovered in 1988. In populations living in a niche with a fixed carrying capacity, any individual is in the long run replaced by a single successor. It follows that, as the expected cumulative number of adult progeny of the same sex approaches unity as a function of life time of the progenitor, the latter's survivability must approach zero if the sum is to remain unity. A physiological prediction follows: a centralized physicochemical clock--like a sedimentation process--must exist somewhere in the organism controlling a secreted substance that reaches all cells. In this way, the pineal coacervates and the pineal's hormonal product melatonin were arrived at on an independent route again. While melatonin as a drug has been used on human volunteers for decades, its anti-aging effect has yet to be proved. Detailed hormone profiles in different age groups and under different life styles have to be performed. A modified Hayflick in vitro experiment is also needed to elucidate the mechanism by which melatonin works in cells.

Aging↗

PubMed1993

Is the mind-body interface microscopic?

This paper puts forward the hypothesis that consciousness might be linked to matter in a way which is more sophisticated than the traditional macroscopic Cartesian hypothesis suggests. Advances in the biophysics of the nervous system, not only on the level of its macroscopic functioning but also on the level of individual ion channels, have made the question of 'how finely' consciousness is tied to matter and its dynamics more important. Quantum mechanics limits the attainable resolution and puts into doubt the idea of an infinitely fine-woven attachment. A recent approach to physics rekindles such a rationalist hope. 'Endophysics' focuses on the global implications of microscopic computer simulations of chemical and biophysical processes. A complete 'artificial universe' can be set up in the computer. It produces non-classical and nonlocal effects inside--on the 'interface' that exists between an internal observer ('fluid neuron') and the rest of the world. This interface is finer than any brain property to which the status of the mind-body interface has been attributed hitherto. A new class of experiments becomes possible in the artificial world and, by analogy, in the real world. Magnetic resonance imaging experiments, routinely performed under open-loop conditions, can be repeated under psychophysical (closed-loop) conditions--in search for microscopically induced changes in the perceived and measured structure of the world.

Biophysics↗

PubMed1990

A predictive model for life expectancy curves.

Life expectancy curves have a characteristic ominous shape that has fascinated scientists for centuries. Medawar was the first to explain this shape, specifically the steeply rising proneness of an average individual to die as a function of age, in evolutionary terms. The idea was that the "selective value" of the individual decreases as it has triggered other individuals taking its place (and carrying its genes) into existence. We demonstrate that this idea can be turned into a quantitative model. The resulting 4-parameter function reproduces well two well-known life expectancy curves from the first half of this century. Moreover, the easily interpretable parameters (3 of the 4) seem intuitively reasonable.

Female↗

PubMed1990

Does a centralized clock for ageing exist?

It is proposed that a centralized clock controlling ageing is located in the pineal gland with the calcification process occurring there providing a highly accurate bio-inorganic timing mechanism and the secreted melatonin carrying a signal to all cells in the organism. An explicit programme of data gathering and experiments suitable for the falsification of the proposal, which is consistent with presently known anatomical and physiological facts, is presented. The underlying motivation comes from evolutionary biology and the invariance, that is the allometry, of life expectancy curves.

Aging↗

PubMed1981

An artificial cognitive map system.

A blueprint for a geometric information processor is described. The system essentially combines a digital scan converter with a digital flight simulator. The latter's 'local' (Poincaréan) rather than standing (Helmholtzian) display may have advantages in 3-dimensional diagnostic imaging. At the same time, the system provides a technologically realizable abstract model in terms of which to express (and perhaps eventually explain) the experimental results of O'Keefe and Nadel on the functioning of the hippocampus in the mammalian brain.

Cognition↗

PubMed1979

Recursive evolution.

In evolutionary systems in which the units (individuals) are generated by a morphogenetic process, unbiased "mosaic type" mutability of the phenotype is not possible (Waddington's principle). The question is whether this unavoidable "channeling" can itself be made plastic through provision of alternative morphogeneses possessing differing "hot spots." If so, plasticity would not only be reestablished, but be established at a higher level. Plasticity itself would be plastic. The property of ultrasplasticity is evolutionarily necessary and stable, but perhaps not possible. Ultraplastic systems form a subclass of "temporal brains" as described in deductive biology. Many of their properties have yet to be discovered.

Adaptation, Biological↗

PubMed1979