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Altered conscious state

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https://www.readbyqxmd.com/read/29772217/altered-activity-and-information-flow-in-the-default-mode-network-of-pilocarpine-induced-epilepsy-rats
#1
Yan Cui, Shuang Yu, Tianjiao Zhang, Yangsong Zhang, Yang Xia, Dezhong Yao, Daqing Guo
Temporal lobe epilepsy (TLE) is considered a brain activity disorder that is likely related to allomnesia and conscious disturbance. In rodents, TLE epileptiform discharges can be triggered by systemic administration of a dose of pilocarpine. However, how these pilocarpine-induced epileptiform discharges generate and propagate through the whole brain has not been well studied. In this study, we sought to assess alterations of activity and information flow in the default mode network (DMN) during TLE epileptiform discharges in pilocarpine-induced TLE rats...
May 14, 2018: Brain Research
https://www.readbyqxmd.com/read/29765311/altered-sense-of-body-ownership-and-agency-in-posttraumatic-stress-disorder-and-its-dissociative-subtype-a-rubber-hand-illusion-study
#2
Daniela Rabellino, Dalila Burin, Sherain Harricharan, Chantelle Lloyd, Paul A Frewen, Margaret C McKinnon, Ruth A Lanius
Traumatic experiences have been linked to the development of altered states of consciousness affecting bodily perception, including alterations in body ownership and in sense of agency, the conscious experience of the body as one's own and under voluntary control. Severe psychological trauma and prolonged distress may lead to posttraumatic stress disorder (PTSD). Together, symptoms of derealization and, related specifically to the sense of body ownership and agency, of depersonalization (where parts of the body or the entire body itself is perceived as detached and out of control), constitute the dissociative subtype (PTSD+DS)...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29761891/processed-electroencephalogram-and-evoked-potential-techniques-for-amelioration-of-postoperative-delirium-and-cognitive-dysfunction-following-non-cardiac-and-non-neurosurgical-procedures-in-adults
#3
REVIEW
Yodying Punjasawadwong, Waraporn Chau-In, Malinee Laopaiboon, Sirivimol Punjasawadwong, Pathomporn Pin-On
BACKGROUND: Postoperative delirium (POD) and postoperative cognitive dysfunction (POCD) may complicate a patient's postoperative recovery in several ways. Monitoring of processed electroencephalogram (EEG) or evoked potential (EP) indices may prevent or minimize POD and POCD, probably through optimization of anaesthetic doses. OBJECTIVES: To assess whether the use of processed EEG or auditory evoked potential (AEP) indices (bispectral index (BIS), narcotrend index, cerebral state index, state entropy and response entropy, patient state index, index of consciousness, A-line autoregressive index, and auditory evoked potentials (AEP index)) as guides to anaesthetic delivery can reduce the risk of POD and POCD in non-cardiac surgical or non-neurosurgical adult patients undergoing general anaesthesia compared with standard practice where only clinical signs are used...
May 15, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29740267/indolethylamine-n-methyltransferase-polymorphisms-genetic-and-biochemical-approaches-for-study-of-endogenous-n-n-dimethyltryptamine
#4
REVIEW
Jon G Dean
N,N -dimethyltryptamine (DMT) is a powerful serotonergic psychedelic whose exogenous administration elicits striking psychedelic effects in humans. Studies have identified DMT and analogous compounds (e.g., 5-hydroxy-DMT, 5-methoxy-DMT) alongside of an enzyme capable of synthesizing DMT endogenously from tryptamine, indolethylamine- N -methyltransferase (INMT), in human and several other mammalian tissues. Subsequently, multiple hypotheses for the physiological role of endogenous DMT have emerged, from proposed immunomodulatory functions to an emphasis on the overlap between the mental states generated by exogenous DMT and naturally occurring altered states of consciousness; e...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29737490/regional-entropy-of-functional-imaging-signals-varies-differently-in-sensory-and-cognitive-systems-during-propofol-modulated-loss-and-return-of-behavioral-responsiveness
#5
Xiaolin Liu, Kathryn K Lauer, B Douglas Ward, Christopher J Roberts, Suyan Liu, Suneeta Gollapudy, Robert Rohloff, William Gross, Zhan Xu, Shanshan Chen, Lubin Wang, Zheng Yang, Shi-Jiang Li, Jeffrey R Binder, Anthony G Hudetz
The level and richness of consciousness depend on information integration in the brain. Altered interregional functional interactions may indicate disrupted information integration during anesthetic-induced unconsciousness. How anesthetics modulate the amount of information in various brain regions has received less attention. Here, we propose a novel approach to quantify regional information content in the brain by the entropy of the principal components of regional blood oxygen-dependent imaging signals during graded propofol sedation...
May 8, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29701885/physical-deterioration-in-an-acute-mental-health-unit-a-quantitative-retrospective-analysis-of-medical-emergencies
#6
Joanne E Porter, Robyn Cant, Karen Missen, Anita Raymond, Anne Churchill
Nursing management of physical deterioration of patients within acute mental health settings is observed, recorded, and actively managed with the use of standardized Adult Deterioration Detection System (ADDS) charts. Patient deterioration may require the urgent assistance of a hospital rapid response or Medical Emergency Team. A five-and-a-half-year (2011-2016) audit of hospital-wide Medical Emergency Team attendances was conducted in an acute mental health unit of a single large 250 bed regional hospital in Victoria, Australia...
April 27, 2018: International Journal of Mental Health Nursing
https://www.readbyqxmd.com/read/29700421/ultra-slow-mechanical-stimulation-of-olfactory-epithelium-modulates-consciousness-by-slowing-cerebral-rhythms-in-humans
#7
A Piarulli, A Zaccaro, M Laurino, D Menicucci, A De Vito, L Bruschini, S Berrettini, M Bergamasco, S Laureys, A Gemignani
The coupling between respiration and neural activity within olfactory areas and hippocampus has recently been unambiguously demonstrated, its neurophysiological basis sustained by the well-assessed mechanical sensitivity of the olfactory epithelium. We herein hypothesize that this coupling reverberates to the whole brain, possibly modulating the subject's behavior and state of consciousness. The olfactory epithelium of 12 healthy subjects was stimulated with periodical odorless air-delivery (frequency 0.05 Hz, 8 s on, 12 off)...
April 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29667267/the-cerebellum-after-trauma-resting-state-functional-connectivity-of-the-cerebellum-in-posttraumatic-stress-disorder-and-its-dissociative-subtype
#8
Daniela Rabellino, Maria Densmore, Jean Théberge, Margaret C McKinnon, Ruth A Lanius
The cerebellum plays a key role not only in motor function but also in affect and cognition. Although several psychopathological disorders have been associated with overall cerebellar dysfunction, it remains unclear whether different regions of the cerebellum contribute uniquely to psychopathology. Accordingly, we compared seed-based resting-state functional connectivity of the anterior cerebellum (lobule IV-V), of the posterior cerebellum (Crus I), and of the anterior vermis across posttraumatic stress disorder (PTSD; n = 65), its dissociative subtype (PTSD + DS; n = 37), and non-trauma-exposed healthy controls (HC; n = 47)...
April 17, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29664874/traumatic-brain-injury-and-infectious-encephalopathy-in-children-from-four-resource-limited-settings-in-africa
#9
Ericka L Fink, Amelie von Saint Andre-von Arnim, Rashmi Kumar, Patrick T Wilson, Tigist Bacha, Abenezer Tirsit Aklilu, Tsegazeab Laeke Teklemariam, Shubhada Hooli, Lisine Tuyisenge, Easmon Otupiri, Anthony Fabio, John Gianakas, Patrick M Kochanek, Derek C Angus, Robert C Tasker
OBJECTIVES: To assess the frequency, interventions, and outcomes of children presenting with traumatic brain injury or infectious encephalopathy in low-resource settings. DESIGN: Prospective study. SETTING: Four hospitals in Sub-Saharan Africa. PATIENTS: Children age 1 day to 17 years old evaluated at the hospital with traumatic brain injury or infectious encephalopathy. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: We evaluated the frequency and outcomes of children presenting consecutively over 4 weeks to any hospital department with traumatic brain injury or infectious encephalopathy...
April 16, 2018: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/29662089/time-rescaling-reproduces-eeg-behavior-during-transition-from-propofol-anesthesia-induced-unconsciousness-to-consciousness
#10
S Boussen, A Spiegler, C Benar, M Carrère, F Bartolomei, P Metellus, R Voituriez, L Velly, N Bruder, A Trébuchon
General anesthesia (GA) is a reversible manipulation of consciousness whose mechanism is mysterious at the level of neural networks leaving space for several competing hypotheses. We recorded electrocorticography (ECoG) signals in patients who underwent intracranial monitoring during awake surgery for the treatment of cerebral tumors in functional areas of the brain. Therefore, we recorded the transition from unconsciousness to consciousness directly on the brain surface. Using frequency resolved interferometry; we studied the intermediate ECoG frequencies (4-40 Hz)...
April 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29601274/revisiting-the-safe-place-method-and-regulatory-aspects-in-psychotherapy-when-easing-allostatic-overload-in-traumatized-patients
#11
Anna Gerge
Safe-place inductions are considered important altered states of consciousness (ASC) to be (re)installed during trauma-informed psychotherapy. Coregulation aimed at changing implicit relational knowing and increasing integration and coherence through relational work and hypnotic techniques is crucial, as clients' abilities to self-soothe and regulate have become seriously impaired. Thus, resource-oriented metaphors as inner strength imagery is advocated. Also, methods such as creative-arts therapy and neurofeedback will induce ASCs, as most methods used with complex traumatized clients, due to their high hypnotizability...
April 2018: International Journal of Clinical and Experimental Hypnosis
https://www.readbyqxmd.com/read/29572926/regional-brain-volumetry-and-brain-function-in-severely-brain-injured-patients
#12
Jitka Annen, Gianluca Frasso, Julia Sophia Crone, Lizette Heine, Carol Di Perri, Charlotte Martial, Helena Cassol, Athena Demertzi, Lionel Naccache, Steven Laureys
OBJECTIVE: The relationship between residual brain tissue in patients with disorders of consciousness (DOC) and the clinical condition is unclear. This observational study aimed to quantify gray (GM) and white matter (WM) atrophy in states of (altered) consciousness. METHODS: Structural T1-weighted magnetic resonance images were processed for 102 severely brain-injured and 52 healthy subjects. Regional brain volume was quantified for 158 (sub)cortical regions using Freesurfer...
April 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29572600/decreased-cerebral-blood-flow-in-mesial-thalamus-and-precuneus-pcc-during-midazolam-induced-sedation-assessed-with-asl
#13
Peipeng Liang, Yachao Xu, Fei Lan, Daqing Ma, Kuncheng Li
While some previous work suggests that midazolam-induced light sedation results from the functional disconnection within resting state network, little is known about the underlying alterations of cerebral blood flow (CBF) associated with its effects. A randomized, double-blind, within-subject, cross-over design was adopted, while 12 healthy young volunteers were scanned with arterial spin-labeling (ASL) perfusion MRI both before and after an injection of either saline or midazolam. The contrast of MRI signal before and after midazolam administration revealed the CBF decrease in the bilateral mesial thalamus and precuneus/posterior cingulate cortex (PCC)...
March 23, 2018: Neuroinformatics
https://www.readbyqxmd.com/read/29570742/impact-of-acute-phase-complications-and-interventions-on-6-month-survival-after-stroke-a-prospective-observational-study
#14
Antonio Di Carlo, Maria Lamassa, Marco Franceschini, Francesca Bovis, Lorenzo Cecconi, Sanaz Pournajaf, Stefano Paravati, Annibale Biggeri, Domenico Inzitari, Salvatore Ferro
The outcome of stroke patients is complex and multidimensional. We evaluated the impact of acute-phase variables, including clinical state, complications, resource use and interventions, on 6-month survival after first-ever stroke, taking into account baseline conditions exerting a possible effect on outcome. As part of a National Research Program, we performed a prospective observational study of acute stroke patients in four Italian Regions. Consecutive patients admitted for a period of 3 months to the emergency rooms of participating hospitals were included...
2018: PloS One
https://www.readbyqxmd.com/read/29564659/subcortical-shape-and-neuropsychological-function-among-u-s-service-members-with-mild-traumatic-brain-injury
#15
David F Tate, Benjamin S C Wade, Carmen S Velez, Ann Marie Drennon, Jacob D Bolzenius, Douglas B Cooper, Jan E Kennedy, Matthew W Reid, Amy O Bowles, Paul M Thompson, Boris A Gutman, Jeffrey D Lewis, John L Ritter, Gerald E York, Erin D Bigler
In a recent manuscript, our group demonstrated shape differences in the thalamus, nucleus accumbens, and amygdala in a cohort of U.S. Service Members with mild traumatic brain injury (mTBI). Given the significant role these structures play in cognitive function, this study directly examined the relationship between shape metrics and neuropsychological performance. The imaging and neuropsychological data from 135 post-deployed United States Service Members from two groups (mTBI and orthopedic injured) were examined...
March 21, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29560311/altered-network-hub-connectivity-after-acute-lsd-administration
#16
Felix Müller, Patrick C Dolder, André Schmidt, Matthias E Liechti, Stefan Borgwardt
LSD is an ambiguous substance, said to mimic psychosis and to improve mental health in people suffering from anxiety and depression. Little is known about the neuronal correlates of altered states of consciousness induced by this substance. Limited previous studies indicated profound changes in functional connectivity of resting state networks after the administration of LSD. The current investigation attempts to replicate and extend those findings in an independent sample. In a double-blind, randomized, cross-over study, 100 μg LSD and placebo were orally administered to 20 healthy participants...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29558288/altered-states-of-consciousness-among-inpatients-in-a-trauma-program
#17
Colin A Ross, Elena Browning
A set of measures of trauma, dissociation, altered states of consciousness, and spiritual experiences was administered to a convenience sample of 100 inpatients in a hospital Trauma Program. The inpatients had an average Dissociative Experiences Scale score of 42.3 and an average Adverse Childhood Experiences Scale score of 6.6, both of which are very high. Both trauma and dissociation correlated significantly with measures of pathological altered states of consciousness (ASC) but not with adaptive, normal spiritual experiences as measured by the Spiritual Orientation Inventory and the ASC Scale...
March 20, 2018: Journal of Trauma & Dissociation
https://www.readbyqxmd.com/read/29486984/cardiac-autonomic-responses-to-nociceptive-stimuli-in-patients-with-chronic-disorders-of-consciousness
#18
Eleonora Tobaldini, Edgar Toschi-Dias, Pietro Davide Trimarchi, Nicola Brena, Angela Comanducci, Silvia Casarotto, Nicola Montano, Guya Devalle
OBJECTIVES: Patients with chronic disorders of consciousness (DOC) may show alterations of autonomic function; however, in this clinical population, no data are available on the specific effects of nociceptive stimuli on cardiac autonomic control. Thus, we aimed at investigating the effects of a noxious stimulation on heart rate variability (HRV) in a population of patients with chronic DOC, taking into account different states of consciousness (vegetative state/unresponsive wakefulness syndrome, VS/UWS and minimally conscious state, MCS)...
May 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29464377/is-oral-feeding-compatible-with-an-unresponsive-wakefulness-syndrome
#19
Evelyne Mélotte, Audrey Maudoux, Sabrina Delhalle, Charlotte Martial, Georgios Antonopoulos, Stephen Karl Larroque, Sarah Wannez, Marie-Elisabeth Faymonville, Jean-François Kaux, Steven Laureys, Olivia Gosseries, Audrey Vanhaudenhuyse
OBJECTIVE: The aim of the study is to explore the possibility of oral feeding in unresponsive wakefulness syndrome/vegetative state (UWS/VS) patients. METHOD: We reviewed the clinical information of 68 UWS/VS patients (mean age 45 ± 11; range 16-79 years) searching for mention of oral feeding. UWS/VS diagnosis was made after repeated behavioural assessments using the Coma Recovery Scale-Revised. Patients also had complementary neuroimaging evaluations (positron emission tomography, functional magnetic resonance imaging and electroencephalography and diffusion tensor imaging)...
April 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29443785/can-endotracheal-intubation-be-the-first-step-in-management-of-nonconvulsive-status-epilepticus-a-case-report
#20
Saad Warraich, Abbas Ali, Atif Nizami, Moiz Bakhiet
RATIONALE: Nonconvulsive status epilepticus (NCSE) is prolonged seizure activity without motor manifestations. Clinically, there are certain examination findings, in addition to elements of history, that help differentiate it from other encephalopathies. When diagnosing NCSE, the physician faces significant difficulties due to inconsistent clinical presentation and somewhat nonspecific electroencephalogram (EEG) criteria. PATIENT CONCERNS: To highlight the problems faced when dealing with such a patient, a case of a 29-year-old male who presented with an altered state of consciousness is put forth for the reader...
February 2018: Medicine (Baltimore)
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