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https://www.readbyqxmd.com/read/29134612/altered-connectivity-patterns-among-resting-state-networks-in-patients-with-ischemic-white-matter-lesions
#1
Ju-Rong Ding, Xin Ding, Bo Hua, Xingzhong Xiong, Yuqiao Wen, Zhongxiang Ding, Qingsong Wang, Paul Thompson
White matter lesions (WMLs) have been associated with cognitive and motor decline. Resting state networks (RSNs) are spatially coherent patterns in the human brain and their interactions sustain our daily function. Therefore, investigating the altered intra- and inter-network connectivity among the RSNs may help to understand the association of WMLs with impaired cognitive and motor function. Here, we assessed alterations in functional connectivity patterns based on six well-defined RSNs-the default mode network (DMN), dorsal attention network (DAN), frontal-parietal control network (FPCN), auditory network (AN), sensory motor network (SMN) and visual network (VN)-in 15 patients with ischemic WMLs and 15 controls...
November 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29125485/cognitive-variability-predicts-incident-alzheimer-s-disease-and-mild-cognitive-impairment-comparable-to-a-cerebrospinal-fluid-biomarker
#2
Carey E Gleason, Derek Norton, Eric D Anderson, Michelle Wahoske, Danielle T Washington, Emre Umucu, Rebecca L Koscik, N Maritza Dowling, Sterling C Johnson, Cynthia M Carlsson, Sanjay Asthana
BACKGROUND: Alzheimer's disease (AD) biomarkers are emerging as critically important for disease detection and monitoring. Most biomarkers are obtained through invasive, resource-intense procedures. A cognitive marker, intra-individual cognitive variability (IICV) may provide an alternative or adjunct marker of disease risk for individuals unable or disinclined to undergo lumbar puncture. OBJECTIVE: To contrast risk of incident AD and mild cognitive impairment (MCI) associated with IICV to risk associated with well-established biomarkers: cerebrospinal fluid (CSF) phosphorylated tau protein (p-tau181) and amyloid-β 42 (Aβ42) peptide...
November 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29121293/brain-functional-connectivity-differentiates-dexmedetomidine-from-propofol-and-natural-sleep
#3
P Guldenmund, A Vanhaudenhuyse, R D Sanders, J Sleigh, M A Bruno, A Demertzi, M A Bahri, O Jaquet, J Sanfilippo, K Baquero, M Boly, J F Brichant, S Laureys, V Bonhomme
Background: We used functional connectivity measures from brain resting state functional magnetic resonance imaging to identify human neural correlates of sedation with dexmedetomidine or propofol and their similarities with natural sleep. Methods: Connectivity within the resting state networks that are proposed to sustain consciousness generation was compared between deep non-rapid-eye-movement (N3) sleep, dexmedetomidine sedation, and propofol sedation in volunteers who became unresponsive to verbal command...
October 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29117877/post-traumatic-symptomatology-and-compulsions-as-potential-mediators-of-the-relation-between-child-sexual-abuse-and-auditory-verbal-hallucinations
#4
Simon McCarthy-Jones
BACKGROUND: Whilst evidence is mounting that childhood sexual abuse (CSA) can be a cause of auditory verbal hallucinations (AVH), it is unclear what factors mediate this relation. Recent evidence suggests that post-traumatic symptomatology may mediate the CSA-AVH relation in clinical populations, although this hypothesis has not yet been tested in the general population. There is also reason to believe that obsessive ideation could mediate the CSA-AVH relation. AIMS: To test for evidence to falsify the hypotheses that post-traumatic symptomatology, obsessions, compulsions, anxiety and depression mediate the relation between CSA and AVH in a general population sample...
November 9, 2017: Behavioural and Cognitive Psychotherapy
https://www.readbyqxmd.com/read/29106999/functional-connectivity-in-the-dorsal-stream-and-between-bilateral-auditory-related-cortical-areas-differentially-contribute-to-speech-decoding-depending-on-spectro-temporal-signal-integrity-and-performance
#5
Stefan Elmer, Jürg Kühnis, Piyush Rauch, Seyed Abolfazl Valizadeh, Lutz Jäncke
Speech processing relies on the interdependence between auditory perception, sensorimotor integration, and verbal memory functions. Functional and structural connectivity between bilateral auditory-related cortical areas (ARCAs) facilitates spectro-temporal analyses, whereas the dynamic interplay between ARCAs and Broca's area (i.e., dorsal pathway) contributes to verbal memory functions, articulation, and sound-to-motor mapping. However, it remains unclear whether these two neural circuits are preferentially driven by spectral or temporal acoustic information, and whether their recruitment is predictive of speech perception performance and learning...
October 30, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29106884/impact-of-socioeconomic-factors-on-paediatric-cochlear-implant-outcomes
#6
Shalabh Sharma, Khyati Bhatia, Satinder Singh, Asish Kumar Lahiri, Asha Aggarwal
OBJECTIVES: The study was aimed at evaluating the impact of certain socioeconomic factors such as family income, level of parents' education, distance between the child's home and auditory verbal therapy clinic, and age of the child at implantation on postoperative cochlear implant outcomes. METHODS: Children suffering from congenital bilateral profound sensorineural hearing loss and a chronologic age of 4 years or younger at the time of implantation were included in the study...
November 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29105058/verbal-memory-decline-from-hippocampal-depth-electrodes-in-temporal-lobe-surgery-for-epilepsy
#7
Hanna Ljung, Arto Nordlund, Maria Strandberg, Johan Bengzon, Kristina Källén
OBJECTIVE: To explore whether patients with refractory mesial temporal lobe epilepsy risk aggravated verbal memory loss from intracranial electroencephalography (EEG) recording with longitudinal hippocampal electrodes in the language-dominant hemisphere. METHODS: A long-term neuropsychological follow-up (mean 61.5 months, range 22-111 months) was performed in 40 patients after ictal registration with left hippocampal depth electrodes (study group, n = 16) or no invasive EEG, only extracranial registration (reference group, n = 24)...
November 3, 2017: Epilepsia
https://www.readbyqxmd.com/read/29100951/distinct-cerebellar-regions-related-to-motor-and-cognitive-performance-in-sca6-patients
#8
Zubir Rentiya, Noore-Sabah Khan, Ezgi Ergun, Sarah H Ying, John E Desmond
OBJECTIVE: To demonstrate a correlation between anatomic regional changes in Spinocerebellar Ataxia type 6 (SCA6) patients and measures of cognitive performance on neuropsychological tests. METHODS: Neurocognitive testing was conducted on 24 SCA6 and 28 control subjects. For each cognitive test, SCA6 patients were compared against the controls using Student's t-test. For the cerebellar patients, using voxel based morphometry, correlations between cerebellar gray matter volume at each voxel and performance on the neuropsychological exams were calculated using the Pearson correlation coefficient implemented in SPM8...
October 31, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29094675/associations-between-psychosis-endophenotypes-across-brain-functional-structural-and-cognitive-domains
#9
R Blakey, S Ranlund, E Zartaloudi, W Cahn, S Calafato, M Colizzi, B Crespo-Facorro, C Daniel, Á Díez-Revuelta, M Di Forti, C Iyegbe, A Jablensky, R Jones, M-H Hall, R Kahn, L Kalaydjieva, E Kravariti, K Lin, C McDonald, A M McIntosh, M Picchioni, J Powell, A Presman, D Rujescu, K Schulze, M Shaikh, J H Thygesen, T Toulopoulou, N Van Haren, J Van Os, M Walshe, R M Murray, E Bramon
BACKGROUND: A range of endophenotypes characterise psychosis, however there has been limited work understanding if and how they are inter-related. METHODS: This multi-centre study includes 8754 participants: 2212 people with a psychotic disorder, 1487 unaffected relatives of probands, and 5055 healthy controls. We investigated cognition [digit span (N = 3127), block design (N = 5491), and the Rey Auditory Verbal Learning Test (N = 3543)], electrophysiology [P300 amplitude and latency (N = 1102)], and neuroanatomy [lateral ventricular volume (N = 1721)]...
November 2, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29094068/verbal-working-memory-and-inhibition-concentration-in-adults-with-cochlear-implants
#10
Aaron C Moberly, Derek M Houston, Michael S Harris, Oliver F Adunka, Irina Castellanos
Objectives: Neurocognitive functions contribute to speech recognition in postlingual adults with cochlear implants (CIs). In particular, better verbal working memory (WM) on modality-specific (auditory) WM tasks predicts better speech recognition. It remains unclear, however, whether this association can be attributed to basic underlying modality-general neurocognitive functions, or whether it is solely a result of the degraded nature of auditory signals delivered by the CI. Three hypotheses were tested: 1) Both modality-specific and modality-general tasks of verbal WM would predict scores of sentence recognition in speech-shaped noise; 2) Basic modality-general neurocognitive functions of controlled fluency and inhibition-concentration would predict both modality-specific and modality-general verbal WM; and 3) Scores on both tasks of verbal WM would mediate the effects of more basic neurocognitive functions on sentence recognition...
October 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/29089190/speech-illusions-and-working-memory-performance-in-non-clinical-psychosis
#11
Tina Gupta, Jordan E DeVylder, Randy P Auerbach, Jason Schiffman, Vijay A Mittal
Psychotic disorders are characterized by auditory verbal hallucinations (AVHs), and research has shown that AVHs are linked to deficits in working memory. Our understanding of AVHs across the psychosis continuum is limited. To date, little research has tested whether hallucination proneness (HP) is linked with abnormalities on experimental multispeaker babble tasks. Few investigations have been conducted to determine how task performance might be linked to cognitive functioning. The objective of the current study is to better understand this empirical gap...
October 28, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/29079569/associations-of-nocturnal-blood-pressure-with-cognition-by-self-identified-race-in-middle-aged-and-older-adults-the-genoa-genetic-epidemiology-network-of-arteriopathy-study
#12
Yuichiro Yano, Kenneth R Butler, Michael E Hall, Gary L Schwartz, David S Knopman, Seth T Lirette, Daniel W Jones, James G Wilson, John E Hall, Adolfo Correa, Stephen T Turner, Thomas H Mosley
BACKGROUND: Whether the association of blood pressure (BP) during sleep (nocturnal BP) with cognition differs by race is unknown. METHODS AND RESULTS: Participants in the GENOA (Genetic Epidemiology Network of Arteriopathy) Study underwent ambulatory BP measurements, brain magnetic resonance imaging, and cognitive function testing (the Rey Auditory Verbal Learning Test, the Digit Symbol Substitution Task, and the Trail Making Test Part B) between 2000 and 2007. We examined multivariable linear regression models of the nocturnal BP-cognition association...
October 27, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29077136/-non-invasive-brain-stimulation-in-schizophrenia-hallucinations-and-negative-symptoms
#13
A Aleman, J Brummelman, J J Dlabac-de Lange, S Koops, H Knegtering, S F W Neggers, I E Sommer
New approaches are needed in the treatment of characteristic symptoms of schizophrenia such as hallucinations and negative symptoms. Non-invasive brain stimulation can make a useful contribution.<br/> AIM: To discuss the published evidence regarding efficacy and safety of repetitive transcranial magnetic stimulation (rtms) and transcranial direct current stimulation (tdcs) when used in the treatment of auditory verbal hallucinations and negative symptoms.<br/> METHOD: We review and discuss recent meta-analyses and we analyse relevant factors...
2017: Tijdschrift Voor Psychiatrie
https://www.readbyqxmd.com/read/29069435/auditory-verbal-hallucinations-in-schizophrenia-from-a-levels-of-explanation-perspective
#14
Kenneth Hugdahl, Iris E Sommer
In the present article, we present a "Levels of Explanation" (LoE) approach to auditory verbal hallucinations (AVHs) in schizophrenia. Mental phenomena can be understood at different levels of explanation, including cultural, clinical, cognitive, brain imaging, cellular, and molecular levels. Current research on AVHs is characterized by accumulation of data at all levels, but with little or no interaction of findings between levels. A second advantage with a Levels of Explanation approach is that it fosters interdisciplinarity and collaboration across traditional borders, facilitating a real breakthrough in future research...
October 24, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29066713/hallucinations-in-borderline-personality-disorder-prevalence-characteristics-and-associations-with-comorbid-symptoms-and-disorders
#15
Maria B A Niemantsverdriet, Christina W Slotema, Jan Dirk Blom, Ingmar H Franken, Hans W Hoek, Iris E C Sommer, Mark van der Gaag
To establish the point prevalence of hallucinations in borderline personality disorder (BPD), telephone interviews were conducted with 324 outpatients diagnosed with BPD. Then a subgroup (n = 98) was interviewed in person to investigate the co-occurrence of these phenomena with other psychotic symptoms, comorbid psychiatric disorders, prior childhood adversities, and adult life stressors. For hallucinations in general a point prevalence of 43% was found, with rates for hallucinations in separate sensory modalities ranging from 8-21%...
October 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29060417/spatiotemporal-properties-of-magnetic-fields-induced-by-auditory-speech-sound-imagery-and-perception
#16
Shihomi Uzawa, Tetsuya Takiguchi, Yasuo Ariki, Seiji Nakagawa
Brain computer interface (BCI) technologies, which enable direct communication between the brain and external devices, have been developed. BCI technology can be utilized in neural prosthetics to restore impaired movement, including speech production. However, most of the BCI systems that have been developed are the "P300-speller" type, which can only detect objects that users direct his/her attention at. To develop more versatile BCI systems that can detect a user's intention or thoughts, the brain responses associated with verbal imagery need to be clarified...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29058555/auditory-verbal-habilitation-is-associated-with-improved-outcome-for-children-with-cochlear-implant
#17
Lone Percy-Smith, Tenna Lindbjerg Tønning, Jane Lignel Josvassen, Jeanette Hølledig Mikkelsen, Lena Nissen, Eveline Dieleman, Maria Hallstrøm, Per Cayé-Thomasen
OBJECTIVES: To study the impact of (re)habilitation strategy on speech-language outcomes for early, cochlear implanted children enrolled in different intervention programmes post implant. METHODS: Data relate to a total of 130 children representing two pediatric cohorts consisting of 94 and 36 subjects, respectively. The two cohorts had different speech and language intervention following cochlear implantation, i.e. standard habilitation vs. auditory verbal (AV) intervention...
October 23, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/29050393/distinct-processing-of-ambiguous-speech-in-people-with-non-clinical-auditory-verbal-hallucinations
#18
Ben Alderson-Day, César F Lima, Samuel Evans, Saloni Krishnan, Pradheep Shanmugalingam, Charles Fernyhough, Sophie K Scott
Auditory verbal hallucinations (hearing voices) are typically associated with psychosis, but a minority of the general population also experience them frequently and without distress. Such 'non-clinical' experiences offer a rare and unique opportunity to study hallucinations apart from confounding clinical factors, thus allowing for the identification of symptom-specific mechanisms. Recent theories propose that hallucinations result from an imbalance of prior expectation and sensory information, but whether such an imbalance also influences auditory-perceptual processes remains unknown...
September 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29048273/chiari-1000-registry-project-assessment-of-surgical-outcome-on-self-focused-attention-pain-and-delayed-recall
#19
P A Allen, D Delahanty, K P Kaut, X Li, M Garcia, J R Houston, D M Tokar, F Loth, J Maleki, S Vorster, M G Luciano
BACKGROUND: Prior research has typically found a negative relationship between chronic pain and memory, and we examined whether cognitive control processes (e.g. reflection and rumination) moderated this relationship in individuals with Chiari malformation Type I (CM). CM is a neurological condition in which the cerebellar tonsils descend into the medullary and upper cervical spine regions potentially resulting in severe headaches and neck pain. METHODS: CM patients who had (n = 341) and had not (n = 297) undergone decompression surgery completed the McGill Pain Questionnaire-Short Form-Revised (SF-MPQ-2), the Rey Auditory Verbal Learning Test (RAVLT), and the Rumination-Reflection Questionnaire (RRQ)...
October 19, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29040828/neuropsychological-functioning-and-brain-energetics-of-drug-resistant-mesial-temporal-lobe-epilepsy-patients
#20
Camila Moreira Osório, Alexandra Latini, Rodrigo Bainy Leal, Maria Emília Rodrigues de Oliveira Thais, Helena Dresch Vascouto, Aline Pertile Remor, Mark William Lopes, Marcelo Neves Linhares, Juliana Ben, Roberta de Paula Martins, Rui Daniel Prediger, Alexandre Ademar Hoeller, Hans Joachim Markowitsch, Peter Wolf, Kátia Lin, Roger Walz
Interictal hypometabolism is commonly measured by 18-fluoro-deoxyglucose Positron Emission Tomography (FDG-PET) in the temporal lobe of patients with mesial temporal lobe epilepsy (MTLE-HS). Left temporal lobe interictal FDG-PET hypometabolism has been associated with verbal memory impairment, while right temporal lobe FDG-PET hypometabolism is associated with nonverbal memory impairment. The biochemical mechanisms involved in these findings remain unknown. In comparison to healthy controls (n=21), surgically treated patients with MTLE-HS (n=32, left side=17) had significant lower scores in the Rey Auditory Verbal Learning Test (RAVLT retention and delayed), Logical Memory II (LMII), Boston Naming test (BNT), Letter Fluency and Category Fluency...
October 12, 2017: Epilepsy Research
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