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Consciousness

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https://www.readbyqxmd.com/read/28092711/-the-future-of-ecology-wisdom-as-the-speculative-centre-of-environmental-ethics
#1
Luca Valera
This article argues that it is necessary to go back to Potter's proposal to rediscover a concept of bioethics wider than medical ethics, and strongly connected to environmental ethics. The two disciplines share, among others, the following dimensions: the consciousness of the sin as a consequence of recent technological developments; the need for a salvation; the need for a science of survival; wisdom as a possible solution. Referring to the latter, the work of Van Rennselaer Potter (father of bioethics) and Arne Næss (father of deep ecology, and in a broader sense, of environmental ethics) are particularly linked: it seems that wisdom should be the virtue providing answers about our way of dwelling the world...
September 2016: Cuadernos de Bioética: Revista Oficial de la Asociación Española de Bioética y Ética Médica
https://www.readbyqxmd.com/read/28092321/dexmedetomidine-disrupts-the-local-and-global-efficiencies-of-large-scale-brain-networks
#2
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...
January 16, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28092095/noradrenergic-transmission-in-the-central-medial-thalamic-nucleus-modulates-the-electroencephalographic-activity-and-emergence-from-propofol-anesthesia-in-rats
#3
Bao Fu, Tian Yu, Jie Yuan, Xingrui Gong, Mazhong Zhang
At present, the mechanisms by which general anesthetics causing loss of consciousness remain unclear. The central medial thalamic nucleus (CMT) is a rarely studied component of the midline thalamic complex, which is deemed to be a part of the nonspecific arousal system. Despite the fact that CMT participates in modulating arousal and receives excitatory noradrenergic projections from locus coeruleus (LC), it remains unknown whether the noradrenergic pathway in the CMT takes part in modulating the arousal system...
January 16, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28091761/on-the-origins-of-endogenous-thoughts
#4
Alexandros Tillas
Endogenous thoughts are thoughts that we activate in a top-down manner or in the absence of the appropriate stimuli. We use endogenous thoughts to plan or recall past events. In this sense, endogenous thinking is one of the hallmarks of our cognitive lives. In this paper, I investigate how it is that we come to possess endogenous control over our thoughts. Starting from the close relation between language and thinking, I look into speech production-a process motorically controlled by the inferior frontal gyrus (IFG)...
January 13, 2017: Cognitive Processing
https://www.readbyqxmd.com/read/28091350/the-effects-of-flavanone-rich-citrus-juice-on-cognitive-function-and-cerebral-blood-flow-an-acute-randomised-placebo-controlled-cross-over-trial-in-healthy-young-adults
#5
Daniel J Lamport, Deepa Pal, Anna L Macready, Sofia Barbosa-Boucas, John M Fletcher, Claire M Williams, Jeremy P E Spencer, Laurie T Butler
A plausible mechanism underlying flavonoid-associated cognitive effects is increased cerebral blood flow (CBF). However, behavioural and CBF effects following flavanone-rich juice consumption have not been explored. The aim of this study was to investigate whether consumption of flavanone-rich juice is associated with acute cognitive benefits and increased regional CBF in healthy, young adults. An acute, single-blind, randomised, cross-over design was applied with two 500-ml drink conditions - high-flavanone (HF; 70·5 mg) drink and an energy-, and vitamin C- matched, zero-flavanone control...
January 16, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28090181/how-much-we-think-of-ourselves-and-how-little-we-think-of-others-an-investigation-of-the-neuronal-signature-of-self-consciousness-between-different-personality-traits-through-an-event-related-potential-study
#6
Auwal Bello Hassan, Tahamina Begum, Mohammed Faruque Reza, Nasir Yusoff
BACKGROUND: Previous studies have revealed that self-related tasks (items) receive more attention than non-self-related, and that they elicit event-related potential (ERP) components with larger amplitudes. Since personality has been reported as one of the biological correlates influencing these components, as well as our behavioural differences, it is important to examine how it affects our self-consciousness in relation to tasks of varied relevance and the neurological basis. METHODS: A total of 33 male and female undergraduate Malaysian medical students of Universiti Sains Malaysia (USM) participated in the study...
November 2016: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28090058/herpes-simplex-encephalitis-complicated-by-cerebral-hemorrhage-during-acyclovir-therapy
#7
Yukinori Harada, Yuuta Hara
Herpes simplex encephalitis (HSE) can be complicated by adverse events in the acute phase. We herein present the case of a 71-year-old woman with HSE complicated by cerebral hemorrhage. She presented with acute deterioration of consciousness and fever and was diagnosed with HSE based on the detection of herpes simplex virus-1 in the cerebrospinal fluid by a polymerase chain reaction. The cerebral hemorrhage developed during acyclovir therapy; however, its diagnosis was delayed for 2 days. After the conservative treatment of the cerebral hemorrhage, the patient made a near-complete recovery...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28089918/cardiovascular-and-respiratory-activity-of-pk20-opioid-and-neurotensin-hybrid-peptide-in-anesthetized-and-awake-rats
#8
Katarzyna Kaczyńska, Piotr Wojciechowski, Monika Jampolska, Andrzej W Lipkowski, Patrycja Kleczkowska
AIM: Chimeric compound - PK20 despite its therapeutic activity on nociceptive and inflammatory processes may affect respiration and blood pressure. Our objective was to evaluate influence of the hybrid composed of endomorphin-2 and neurotensin fragments on ventilation, heart rate and blood pressure in anesthetized and awake rats. METHODS: The effects of PK20 (1mg/kg) were studied either after its intravenous administration in anesthetized rats or intraperitoneal injection in awake state...
January 12, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28088645/towards-solving-the-hard-problem-of-consciousness-the-varieties-of-brain-resonances-and-the-conscious-experiences-that-they-support
#9
Stephen Grossberg
The hard problem of consciousness is the problem of explaining how we experience qualia or phenomenal experiences, such as seeing, hearing, and feeling, and knowing what they are. To solve this problem, a theory of consciousness needs to link brain to mind by modeling how emergent properties of several brain mechanisms interacting together embody detailed properties of individual conscious psychological experiences. This article summarizes evidence that Adaptive Resonance Theory, or ART, accomplishes this goal...
December 6, 2016: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28088577/analyze-the-beta-waves-of-electroencephalogram-signals-from-young-musicians-and-non-musicians-in-major-scale-working-memory-task
#10
Chien-Chang Hsu, Ching-Wen Cheng, Yi-Shiuan Chiu
Electroencephalograms can record wave variations in any brain activity. Beta waves are produced when an external stimulus induces logical thinking, computation, and reasoning during consciousness. This work uses the beta wave of major scale working memory N-back tasks to analyze the differences between young musicians and non-musicians. After the feature analysis uses signal filtering, Hilbert-Huang transformation, and feature extraction methods to identify differences, k-means clustering algorithm are used to group them into different clusters...
January 12, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28087556/ahead-study-an-observational-study-of-the-management-of-anticoagulated-patients-who-suffer-head-injury
#11
Suzanne Mason, Maxine Kuczawski, M Dawn Teare, Matt Stevenson, Steve Goodacre, Shammi Ramlakhan, Francis Morris, Joanne Rothwell
OBJECTIVES: Management of anticoagulated patients after head injury is unclear due to lack of robust evidence. This study aimed to determine the adverse outcome rate in these patients and identify risk factors associated with poor outcome. DESIGN: Multicentre, observational study using routine patient records. SETTING: 33 emergency departments in England and Scotland. PARTICIPANTS: 3566 adults (aged ≥16 years) who had suffered blunt head injury and were currently taking warfarin...
January 13, 2017: BMJ Open
https://www.readbyqxmd.com/read/28087259/clinical-manifestations-outcomes-and-etiologies-of-perinatal-stroke-in-taiwan-comparisons-between-ischemic-and-hemorrhagic-stroke-based-on-10-year-experience-in-a-single-institute
#12
Chien-Chung Lee, Jainn-Jim Lin, Kuang-Lin Lin, Wai-Ho Lim, Kai-Hsiang Hsu, Jen-Fu Hsu, Ren-Huei Fu, Ming-Chou Chiang, Shih-Ming Chu, Reyin Lien
BACKGROUND: Perinatal stroke is a common cause of established neurological sequelae. Although several risk factors have been identified, many questions regarding causes and clinical outcomes remain unanswered. This study investigated the clinical manifestations and outcomes of perinatal stroke and identified its etiologies in Taiwan. METHODS: We searched the reports of head magnetic resonance imaging and computed tomography performed between January 2003 and December 2012...
November 19, 2016: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28086891/measurement-of-electrocardiograms-in-a-bath-through-tap-water-utilizing-capacitive-coupling-electrodes-placed-outside-the-bathtub-wall
#13
Kosuke Motoi, Yasuhiro Yamakoshi, Takehiro Yamakoshi, Hiroaki Sakai, Naoto Tanaka, Ken-Ichi Yamakoshi
BACKGROUND: Taking a bath sometimes poses a risk for subjects with chronic cardiopulmonary disorders, due to the thermal effect and water pressure on his/her body. The ECG measurement would be helpful for the early recognition of abnormal cardiac beats and respiratory conditions. This paper describes a new attempt to improve on previous bathtub ECG measurement techniques that had electrodes placed inside the bathtub that were intrusive to the subjects' bathing experience. This study is concerned with the initial development of a method to measure an electrocardiogram (ECG) through tap water without conscious awareness of the presence of electrodes that are placed outside the bathtub wall...
January 11, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28080967/affective-touch-and-attachment-style-modulate-pain-a-laser-evoked-potentials-study
#14
Charlotte Krahé, Marianne M Drabek, Yannis Paloyelis, Aikaterini Fotopoulou
Affective touch and cutaneous pain are two sub-modalities of interoception with contrasting affective qualities (pleasantness/unpleasantness) and social meanings (care/harm), yet their direct relationship has not been investigated. In 50 women, taking into account individual attachment styles, we assessed the role of affective touch and particularly the contribution of the C tactile (CT) system in subjective and electrophysiological responses to noxious skin stimulation, namely N1 and N2-P2 laser-evoked potentials...
November 19, 2016: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28080966/active-interoceptive-inference-and-the-emotional-brain
#15
REVIEW
Anil K Seth, Karl J Friston
We review a recent shift in conceptions of interoception and its relationship to hierarchical inference in the brain. The notion of interoceptive inference means that bodily states are regulated by autonomic reflexes that are enslaved by descending predictions from deep generative models of our internal and external milieu. This re-conceptualization illuminates several issues in cognitive and clinical neuroscience with implications for experiences of selfhood and emotion. We first contextualize interoception in terms of active (Bayesian) inference in the brain, highlighting its enactivist (embodied) aspects...
November 19, 2016: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28080961/interoception-beyond-homeostasis-affect-cognition-and-mental-health
#16
Manos Tsakiris, Hugo Critchley
Interoception refers to the sensing of the internal state of one's body. Interoception is distinct from the processing of sensory information concerning external (non-self) stimuli (e.g. vision, hearing, touch and smell) and is the afferent axis to internal (autonomic and hormonal) physiological control. However, the impact of interoception extends beyond homeostatic/allostatic reflexes: it is proposed to be fundamental to motivation, emotion (affective feelings and behaviours), social cognition and self-awareness...
November 19, 2016: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28080089/what-you-like-is-what-you-try-to-get-attitudes-toward-emotions-and-situation-selection
#17
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
#18
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/28078316/covert-narrative-capacity-mental-life-in-patients-thought-to-lack-consciousness
#19
Lorina Naci, Mackenzie Graham, Adrian M Owen, Charles Weijer
Despite the apparent absence of external signs of consciousness, a significant proportion of behaviorally nonresponsive patients can respond to commands by willfully modulating their brain activity. However, little is known about the mental life of these patients. We discuss a recent innovative approach, which sheds light on the preserved cognitive capacities of these patients, including executive function, theory of mind, and the experience of affective states. This research represents a fundamental shift in our understanding of these patients, and has important implications for both their continued treatment and care...
January 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28077740/the-jarisch-herxheimer-reaction-after-antibiotic-treatment-of-spirochetal-infections-a-review-of-recent-cases-and-our-understanding-of-pathogenesis
#20
REVIEW
Thomas Butler
Within 24 hours after antibiotic treatment of the spirochetal infections syphilis, Lyme disease, leptospirosis, and relapsing fever (RF), patients experience shaking chills, a rise in temperature, and intensification of skin rashes known as the Jarisch-Herxheimer reaction (JHR) with symptoms resolving a few hours later. Case reports indicate that the JHR can also include uterine contractions in pregnancy, worsening liver and renal function, acute respiratory distress syndrome, myocardial injury, hypotension, meningitis, alterations in consciousness, seizures, and strokes...
January 11, 2017: American Journal of Tropical Medicine and Hygiene
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