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Medical Hypotheses

ISSN 1532-2777, 0306-9877

71 papers in the library · 468 citations · publishing 1986-2023

Papers

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Meditation potentially capable of increasing susceptibility to epilepsy - a follow-up hypothesis.

Medical Hypotheses 2006 Harinder Jaseja

In an earlier article entitled "Meditation may predispose to epilepsy: an insight into the alteration in brain environment induced by meditation" published in Medical Hypotheses 2005:64(3):464-7, the author has hypothesized that meditation exerts predisposing influence on epileptogenesis. The hypothesis is based on certain EEG changes and electrographic features (namely hypersynchrony and...

Neuronal information coding by oscillation phase prediction error: implications for consciousness and control of voluntary function.

Medical Hypotheses 2006 Jonathan E Freedman

Neuronal oscillatory firing patterns are widely thought to serve as coincidence detectors, so as to synchronize information processing across brain regions. I hypothesize here that, instead, oscillatory function can be better understood by reversing conventional models and regarding oscillations slower than 30 Hz as background activity occurring in the absence of conscious or voluntary...

Why revelations have occurred on mountains? Linking mystical experiences and cognitive neuroscience.

Medical Hypotheses 2005 Shahar Arzy, Moshé Idel, Théodor Landis et al.

The fundamental revelations to the founders of the three monotheistic religions, among many other revelation experiences, had occurred on a mountain. These three revelation experiences share many phenomenological components like feeling and hearing a presence, seeing a figure, seeing lights, and feeling of fear. In addition, similar experiences have been reported by non-mystic contemporary...

Spin-mediated consciousness theory: possible roles of neural membrane nuclear spin ensembles and paramagnetic oxygen.

Medical Hypotheses 2004 Huping Hu, Maoxin Wu

A novel theory of consciousness is proposed in this paper. We postulate that consciousness is intrinsically connected to quantum spin since the latter is the origin of quantum effects in both Bohm and Hestenes quantum formulism and a fundamental quantum process associated with the structure of space-time. That is, spin is the "mind-pixel". The unity of mind is achieved by entanglement of the...

Do neural correlates of consciousness cause conscious states?

Medical Hypotheses 2004 Juergen Fell, Christian E Elger, M. Kurthen

Neural correlates of consciousness (NCCs) have been defined as neural systems and states of those systems, which are correlated with certain states of consciousness and which are minimally sufficient for these states of consciousness to occur. Here, it is discussed whether based on the identification of a NCC one may claim that this neural correlate causes the corresponding state of...

Psychotherapy as assisted homeostasis: activation of emotional processing mediated by the anterior cingulate cortex.

Medical Hypotheses 2004 F M Corrigan

Although psychotherapy is successful in altering emotional distress, the biological mechanism by which it achieves this has not been the subject of intensive neurobiological investigation. Mindful processing of emotion has been proposed [Mindfulness-Based Cognitive Therapy for Depression, The Guilford Press, New York, 2002] to be a key factor in prevention of relapse in depressive illness and...

What does pain signify? A hypothesis concerning pain, the immune system and unconscious pain experience under general anesthesia.

Medical Hypotheses 2004 Yair Neuman

In this paper, I present a case-study that initiates a discussion about the meaning of pain. The case-study concerns a person who was under deep sedation during colonoscopy. The person did not experience pain from a first-person perspective, although pain was evident to the medical team from a second-person perspective. The divergence of pain perspectives raises an interesting quandary. If the...

Schizophrenia, dissociative anaesthesia and near-death experience; three events meeting at the NMDA receptor.

Medical Hypotheses 2004 Iván L Bonta

The three events, viz. schizophrenia, dissociative anaesthesia and Near-Death Experience, despite their seemingly unrelated manifestation to each other, have nevertheless similar functional basis. All three events are linked to the glutamate sensitive N-methyl-D-aspartate (NMDA) receptor complex, which serves as their common functional denominator. Arguments and speculations are presented in...

The function of 'brain waves': a cybernetic model of electroencephalography.

Medical Hypotheses 2003 M ben-Aaron

Electroencephalograms recorded from sleeping subjects are reinterpreted, from first principles, to explain the relationship between the observed wave-forms and cerebral processes. The manifestations of narcolepsy, namely, sleep paralysis, hypnopompic hallucinations and cataplexy are consistent with a hypothesis that the disorder is the result of entrainment of cerebral waves, causing almost...

Impaired information processing triggers altered states of consciousness.

Medical Hypotheses April 1, 2002 M Fritzsche

Schizophrenia, intoxication with tetrahydrocannabinol (Delta-THC), and cannabis psychosis induce characteristic time and space distortions suggesting a common psychotic dysfunction. Since genetic research into schizophrenia has led into disappointing dead ends, the present study is focusing on this phenotype. It is shown that information theory can account for the dynamical basis of higher...

Possible mechanisms of panic attack and schizophrenia via APUD system.

Medical Hypotheses February 2002 K Fukuda

Psilocybin poisoning produces biphasic reactions composed of a schizophrenic phase and a panic attack-like phase. There is a time lag of several hours between phases, which may be considered an accumulation time in certain sites between the gut and the brain. So far as 5-hydroxytryptamine (5-HT) congeners are concerned, no sites are to be found except the amine precursor uptake and...

On the biophysics of consciousness and thought and characteristics of the human mind and intellect.

Medical Hypotheses March 2001 W S Von Arx

Since the cerebral cortex is deeply infolded (to provide a large surface area) and the celerity of neuropropagation across Golgi's layer 1 (the 'molecular feltwork' of the outer brain) has the slowest rate possible in living tissue, we suggest that consciousness, sentience and cognition are wave interference phenomena related to electroencephalographic (EEG) 'rhythms' that appear and disappear...

Rapid-eye-movement sleep involves the memory-conversion circuits in a brain model.

Medical Hypotheses November 2000 C W Wong

People can remember the content of a dream in rapid eye movement (REM) sleep but cannot do so in slow-wave sleep. According to a brain model, memory is stored in encoding synapses as presynaptic axonal 'on-off' patterns and modulating synapses help encoding synapses convert short-term memory into long-term memory. These lead to the hypothesis that REM sleep involves modulating synapses of the...

Ketosis with enhanced GABAergic tone promotes physiological changes in transcendental meditation.

Medical Hypotheses April 2000 A N Elias, S Guich, A F Wilson

Transcendental meditation (TM) is a stylized form of physical and mental relaxation which is associated with changes in the secretion and release of several pituitary hormones. The hormonal changes induced by TM mimic the effects of the inhibitory neurotransmitter gamma aminobutyric acid (GABA). It is hypothesized that TM produces changes in pituitary hormone secretion by enhancing hypothalamic...

Serum hormonal concentrations following transcendental meditation--potential role of gamma aminobutyric acid.

Medical Hypotheses April 1, 1995 A N Elias, A F Wilson

Transcendental mediation (TM) is a stylized form of physical and mental relaxation which is associated with changes in the secretion and release of several pituitary hormones. The hormonal changes induced by TM mimic the effects of the inhibitory neurotransmitter gamma aminobutyric acid (GABA). It is hypothesized that TM produces changes in pituitary hormone secretion by enhancing hypothalamic...

DOI: 10.1016/0306-9877(95)90181-7 (opens in new tab) Hypothalamus Humans Gamma-aminobutyric acid Prolactin +7

Neuroscience and the Near-Death Experience: Roles for the NMSA-PCP receptor, the sigma receptor and the endopsychosins

Medical Hypotheses 1990 Karl Jansen 96 citations

The Near-Death Experience (NDE) is a dissociative mental state with characteristic features. These can be reproduced by ketamine which acts at sigma sites and blocks N-methyl-D-aspartate (NMDA) linked phencyclidine (PCP) receptors to reduce ischaemic damage. Endogenous ligands, alpha and beta-endopsychosin, have been detected for these receptors which suggests an explanation for some NDE's: the...

DOI: 10.1016/0306-9877(90)90048-j (opens in new tab) Ketamine Phencyclidine Nmda receptor Sigma receptor +3

Taking birth trauma seriously.

Medical Hypotheses 1986 Thomas J. Riedlinger, June E. Riedlinger 5 citations

Virtually all mainstream schools of psychology, including biological psychology, reject the idea that people sustain psychological trauma at birth. Their objections are basically those raised by Freud more than 50 years ago: (1) lack of solid evidence that difficult births are related to mental disturbances and (2) a general conviction that the neonatal brain is not sufficiently developed to...

DOI: 10.1016/0306-9877(86)90133-7 (opens in new tab) Full text (opens in new tab) Psychedelic effects Psychotherapy sessions Early life events Birth's psychological impact +2