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Different states of consciousness

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https://www.readbyqxmd.com/read/28214577/parafascicular-thalamic-nucleus-deep-brain-stimulation-decreases-nmda-receptor-glun1-subunit-gene-expression-in-the-prefrontal-cortex
#1
Mónica R Fernández-Cabrera, Abraham Selvas, Miguel Miguéns, Alejandro Higuera-Matas, Anna Vale-Martínez, Emilio Ambrosio, Margarita Martí-Nicolovius, Gemma Guillazo-Blanch
The rodent parafascicular nucleus (PFn) or the centromedian-parafascicular complex of primates is a posterior intralaminar nucleus of the thalamus related to cortical activation and maintenance of states of consciousness underlying attention, learning and memory. Deep brain stimulation (DBS) of the PFn has been proved to restore arousal and consciousness in humans and to enhance performance in learning and memory tasks in rats. The primary expected effect of PFn DBS is to induce plastic changes in target neurons of brain areas associated with cognitive function...
February 15, 2017: Neuroscience
https://www.readbyqxmd.com/read/28203213/high-resolution-audio-with-inaudible-high-frequency-components-induces-a-relaxed-attentional-state-without-conscious-awareness
#2
Ryuma Kuribayashi, Hiroshi Nittono
High-resolution audio has a higher sampling frequency and a greater bit depth than conventional low-resolution audio such as compact disks. The higher sampling frequency enables inaudible sound components (above 20 kHz) that are cut off in low-resolution audio to be reproduced. Previous studies of high-resolution audio have mainly focused on the effect of such high-frequency components. It is known that alpha-band power in a human electroencephalogram (EEG) is larger when the inaudible high-frequency components are present than when they are absent...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28202735/a-higher-order-theory-of-emotional-consciousness
#3
Joseph E LeDoux, Richard Brown
Emotional states of consciousness, or what are typically called emotional feelings, are traditionally viewed as being innately programmed in subcortical areas of the brain, and are often treated as different from cognitive states of consciousness, such as those related to the perception of external stimuli. We argue that conscious experiences, regardless of their content, arise from one system in the brain. In this view, what differs in emotional and nonemotional states are the kinds of inputs that are processed by a general cortical network of cognition, a network essential for conscious experiences...
February 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28195029/the-problem-of-epistemic-jurisdiction-in-global-governance-the-case-of-sustainability-standards-for-biofuels
#4
David E Winickoff, Matthieu Mondou
While there is ample scholarly work on regulatory science within the state, or single-sited global institutions, there is less on its operation within complex modes of global governance that are decentered, overlapping, multi-sectorial and multi-leveled. Using a co-productionist framework, this study identifies 'epistemic jurisdiction' - the power to produce or warrant technical knowledge for a given political community, topical arena or geographical territory - as a central problem for regulatory science in complex governance...
February 2017: Social Studies of Science
https://www.readbyqxmd.com/read/28192860/amplitude-of-low-frequency-fluctuations-during-resting-state-differentially-predicts-authentic-and-hubristic-pride
#5
Feng Kong, Qiaolin He, Xiqin Liu, Xiayu Chen, Xu Wang, Jingjing Zhao
OBJECTIVE: Pride is an important self-conscious emotion and comprised of two distinct conceptual facets: arrogant, egotistic "hubristic pride", and pro-social, achievement-oriented "authentic pride". However, little is known about the neural basis of two facets of pride. Here we investigated the association between spontaneous brain activity and these two facets of pride in resting state. METHOD: We measured 276 participants on authentic and hubristic pride. The fractional amplitude of low frequency fluctuations (fALFF) was used to identify pride-related regions...
February 13, 2017: Journal of Personality
https://www.readbyqxmd.com/read/28179556/distinct-oscillatory-frequencies-underlie-excitability-of-human-occipital-and-parietal-cortex
#6
Jason Samaha, Olivia Gosseries, Bradley R Postle
Transcranial magnetic stimulation (TMS) of human occipital and posterior parietal cortex can give rise to visual sensations called phosphenes. We used near-threshold TMS with concurrent electroencephalography (EEG) recordings to measure how oscillatory brain dynamics covary, on single trials, with the perception of phosphenes following occipital and parietal TMS. Prestimulus power and phase, predominantly in the alpha band (8-13 Hz), predicted occipital TMS phosphenes, whereas higher frequency beta-band (13-20 Hz) power (but not phase) predicted parietal TMS phosphenes...
February 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28159731/a-prospective-multicenter-single-blind-study-assessing-indices-of-snap-ii-versus-bis-vista-on-surgical-patients-undergoing-general-anesthesia
#7
Sergio D Bergese, Alberto A Uribe, Erika G Puente, R-Jay L Marcus, Randall J Krohn, Steven Docsa, Roy G Soto, Keith A Candiotti
BACKGROUND: Traditionally, anesthesiologists have relied on nonspecific subjective and objective physical signs to assess patients' comfort level and depth of anesthesia. Commercial development of electrical monitors, which use low- and high-frequency electroencephalogram (EEG) signals, have been developed to enhance the assessment of patients' level of consciousness. Multiple studies have shown that monitoring patients' consciousness levels can help in reducing drug consumption, anesthesia-related adverse events, and recovery time...
February 3, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28113255/testing-the-significance-of-connectivity-networks-comparison-of-different-assessing-procedures
#8
Jlenia Toppi, Donatella Mattia, Monica Risetti, Rita Formisano, Fabio Babiloni, Laura Astolfi
: Despite the well-established use of partial directed coherence (PDC) to estimate interactions between brain signals, the assessment of its statistical significance still remains controversial. Commonly used approaches are based on the generation of empirical distributions of the null case, implying a considerable computational time, which may become a serious limitation in practical applications. Recently, rigorous asymptotic distributions for PDC were proposed. The aim of this work is to compare the performances of the asymptotic statistics with those of an empirical approach, in terms of both accuracy and computational time...
October 26, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28112403/a-systems-approach-to-physiologic-evolution-from-micelles-to-consciousness
#9
REVIEW
John S Torday, William B Miller
A systems approach to evolutionary biology offers the promise of an improved understanding of the fundamental principles of life through the effective integration of many biologic disciplines. It is presented that any critical integrative approach to evolutionary development involves a paradigmatic shift in perspective, more than just the engagement of a large number of disciplines. Critical to this differing viewpoint is the recognition that all biological processes originate from the unicellular state and remain permanently anchored to that phase throughout evolutionary development despite their macroscopic appearances...
January 23, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28110742/comparison-of-fft-and-marginal-spectra-of-eeg-using-empirical-mode-decomposition-to-monitor-anesthesia
#10
Shih-Jui Chen, Chia-Ju Peng, Yi-Chun Chen, Yean-Ren Hwang, Ying-Sian Lai, Shou-Zen Fan, Kuo-Kuang Jen
BACKGROUND AND OBJECTIVE: Intraoperative awareness refers that patients can recall aspects of their surgery after being put under general anesthesia. This distressing complication causes affected patients to be conscious and probably feel pain, leading to emotional trauma or other sequelae. Monitoring and administrating the depth of anesthesia is necessary to prevent patients from awareness during a medical operation. In this paper, we analyzed the electroencephalograms (EEGs) of patients to characterize their anesthesia...
December 2016: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28108207/cognitive-impairment-is-very-common-in-elderly-patients-with-syncope-and-unexplained-falls
#11
Susanne C de Ruiter, Jos F M de Jonghe, Tjeerd Germans, Jaap H Ruiter, René W M M Jansen
OBJECTIVES: To evaluate the prevalence of cognitive impairment (CI), including mild CI and dementia, in elderly patients with syncope and unexplained falls. In this population, we compared the use of the Mini-Mental State Examination (MMSE) with a cognitive screening test that assesses executive dysfunction typical of subcortical (vascular) CI, that is, the Montreal Cognitive Assessment (MoCA). DESIGN: Observational cohort study. SETTING: Outpatient fall and syncope clinic...
January 17, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28097179/the-comparison-of-two-types-of-relaxation-techniques-on-postoperative-state-anxiety-in-candidates-for-the-mastectomy-surgery-a-randomized-controlled-clinical-trial
#12
Zohreh Parsa Yekta, Fatemeh Sadeghian, Taraneh Taghavi Larijani, Abbas Mehran
BACKGROUND: Anxiety among patients after surgery can affect their physiological and psychological well-being. The aim of this study was to investigate and compare the effects of Benson's relaxation and rhythmic breathing techniques on postoperative anxiety in candidates for the mastectomy surgery. METHODS: This randomized controlled clinical trial study was conducted with ninety patients in 2013. The patients were hospitalized for the mastectomy surgery in three surgical wards in a teaching hospital, Tehran, Iran...
January 2017: International Journal of Community Based Nursing and Midwifery
https://www.readbyqxmd.com/read/28093763/where-east-meets-west-in-the-house-of-individuation
#13
Murray Stein
The psychological process of individuation as experienced in Jungian work may lead to states of consciousness that resemble advanced spiritual developments across religious traditions and cultures. This is where Westerners may reach a common ground with the East. In the essentials and with respect to the final goal there is little difference among the many ways to the self, even if the cultural features in the landscape are disparate. In late stage Jungian analysis and individuation and in what Erich Neumann calls 'centroversion', the personal and the impersonal aspects of the personality accumulate around the ego-self axis to form a composite identity...
February 2017: Journal of Analytical Psychology
https://www.readbyqxmd.com/read/28093358/mapping-the-functional-connectome-traits-of-levels-of-consciousness
#14
Enrico Amico, Daniele Marinazzo, Carol Di Perri, Lizette Heine, Jitka Annen, Charlotte Martial, Mario Dzemidzic, Murielle Kirsch, Vincent Bonhomme, Steven Laureys, Joaquín Goñi
Examining task-free functional connectivity (FC) in the human brain offers insights on how spontaneous integration and segregation of information relate to human cognition, and how this organization may be altered in different conditions, and neurological disorders. This is particularly relevant for patients in disorders of consciousness (DOC) following severe acquired brain damage and coma, one of the most devastating conditions in modern medical care. We present a novel data-driven methodology, connICA, which implements Independent Component Analysis (ICA) for the extraction of robust independent FC patterns (FC-traits) from a set of individual functional connectomes, without imposing any a priori data stratification into groups...
January 16, 2017: NeuroImage
https://www.readbyqxmd.com/read/28092321/dexmedetomidine-disrupts-the-local-and-global-efficiencies-of-large-scale-brain-networks
#15
Javeria A Hashmi, Marco L Loggia, Sheraz Khan, Lei Gao, Jieun Kim, Vitaly Napadow, Emery N Brown, Oluwaseun Akeju
BACKGROUND: A clear understanding of the neural basis of consciousness is fundamental to research in clinical and basic neuroscience disciplines and anesthesia. Recently, decreased efficiency of information integration was suggested as a core network feature of propofol-induced unconsciousness. However, it is unclear whether this finding can be generalized to dexmedetomidine, which has a different molecular target. METHODS: Dexmedetomidine was administered as a 1-μg/kg bolus over 10 min, followed by a 0...
March 2017: Anesthesiology
https://www.readbyqxmd.com/read/28080089/what-you-like-is-what-you-try-to-get-attitudes-toward-emotions-and-situation-selection
#16
Noam Markovitch, Liat Netzer, Maya Tamir
Why do people expose themselves to certain emotional stimuli and avoid others? We propose that what people want to feel is linked to attitudes toward emotions. In 3 studies, we show that individuals with more (vs. less) negative attitudes toward an emotion were more (vs. less) likely to avoid stimuli that induce that emotion. People who evaluated disgust (or joy) less favorably than others were less likely to expose themselves to disgusting (or joyful) pictures (Study 1). These links were emotion-specific and could not be explained by differences in state or trait emotion (Study 2) or in emotional reactivity (Study 3)...
January 12, 2017: Emotion
https://www.readbyqxmd.com/read/28078839/widespread-membrane-potential-changes-and-cardiorespiratory-synchronization-involved-in-anxiety-and-sleep-wake-transitions
#17
R Jerath, S M Cearley, M Jensen
Located within the ascending reticular activating system are nuclei which release neurotransmitters such as acetylcholine, serotonin, dopamine, and norepinephrine. These nuclei have widespread projections that extend into the limbic system and throughout cortex. Activation of these neurotransmitters during awake states leads to arousal, while inhibition leads to the loss of consciousness experienced during slow-wave sleep. Previously, we proposed a mechanism in which cardiorespiratory synchronization may underlie the widespread hyperpolarization that occurs throughout the brain during slow-wave sleep...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28074801/delirium-after-cardiac-surgery-a-pilot-study-from-a-single-tertiary-referral-center
#18
Ashok K Kumar, Aveek Jayant, V K Arya, Rohan Magoon, Ridhima Sharma
BACKGROUND: Advances in cardiac surgery has shifted paradigm of management to perioperative psychological illnesses. Delirium is a state of altered consciousness with easy distraction of thoughts. The pathophysiology of this complication is not clear, but identification of risk factors is important for positive postoperative outcomes. The goal of the present study was to prospectively identify the incidence, motoric subtypes, and risk factors associated with development of delirium in cardiac surgical patients admitted to postoperative cardiac intensive care, using a validated delirium monitoring instrument...
January 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28025814/phenomenology-structure-and-dynamic-of-psychedelic-states
#19
Katrin H Preller, Franz X Vollenweider
Classic serotonergic hallucinogens or psychedelics produce an Altered States of Consciousness (ASC) that is characterized by profound alterations in sensory perception, mood, thought including the perception of reality, and the sense of self. Over the past years, there has been considerable progress in the search for invariant and common features of psychedelic states. In the first part of this review, we outline contemporary approaches to characterize the structure of ASCs by means of three primary etiology-independent dimensions including Oceanic Boundlessness, Anxious Ego Dissolution, and Visionary Restructuralization as well as by 11 lower order factors, all of which can be reliably measured by the Altered State of Consciousness questionnaire (APZ-OAV)...
December 27, 2016: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/27978422/the-distinctive-role-of-executive-functions-in-implicit-emotion-regulation
#20
Marco Sperduti, Dominique Makowski, Margherita Arcangeli, Prany Wantzen, Tiziana Zalla, Stéphane Lemaire, Jérôme Dokic, Jérôme Pelletier, Pascale Piolino
Several theoretical models stress the role of executive functions in emotion regulation (ER). However, most of the previous studies on ER employed explicit regulatory strategies that could have engaged executive functions, beyond regulatory processes per se. Recently, there has been renewed interest in implicit forms of ER, believed to be closer to daily-life requirements. While various studies have shown that implicit and explicit ER engage partially overlapping neurocognitive processes, the contribution of different executive functions in implicit ER has not been investigated...
February 2017: Acta Psychologica
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