keyword
MENU ▼
Read by QxMD icon Read
search

electroencephalographic

keyword
https://www.readbyqxmd.com/read/29238960/is-inpatient-ictal-video-electroencephalographic-monitoring-mandatory-in-mesial-temporal-lobe-epilepsy-with-unilateral-hippocampal-sclerosis-a-prospective-study
#1
Marina K M Alvim, Marcia E Morita, Clarissa L Yasuda, Benito P Damasceno, Tátila M Lopes, Ana Carolina Coan, Enrico Ghizoni, Helder Tedeschi, Fernando Cendes
OBJECTIVE: To compare surgical outcome in mesial temporal lobe epilepsy (MTLE) patients with unilateral hippocampal sclerosis (MTLE-HS) who had or did not have preoperative video-electroencephalographic monitoring (VEEG). METHODS: A prospective study was undertaken with 166 consecutive pharmacoresistant unilateral MTLE-HS patients. All patients were investigated with detailed seizure semiology, serial routine outpatient EEG, magnetic resonance imaging, neuropsychological evaluation, and if necessary, other examinations...
December 13, 2017: Epilepsia
https://www.readbyqxmd.com/read/29236648/a-putative-electrophysiological-biomarker-of-auditory-sensory-memory-encoding-is-sensitive-to-pharmacological-alterations-of-excitatory-inhibitory-balance-in-male-macaque-monkeys
#2
William B Holliday, Kate Gurnsey, Robert A Sweet, Tobias Teichert
BACKGROUND: The amplitude of the auditory evoked N1 component that can be derived from noninvasive electroencephalographic recordings increases as a function of time between subsequent tones. N1 amplitudes in individuals with schizophrenia saturate at a lower asymptote, thus giving rise to a reduced dynamic range. Reduced N1 dynamic range is a putative electrophysiological biomarker of altered sensory memory function in individuals with the disease. To date, it is not clear what determines N1 dynamic range and what causes reduced N1 dynamic range in individuals with schizophrenia...
December 13, 2017: Journal of Psychiatry & Neuroscience: JPN
https://www.readbyqxmd.com/read/29234269/application-of-the-stockwell-transform-to-electroencephalographic-signal-analysis-during-gait-cycle
#3
Mario Ortiz, Marisol Rodríguez-Ugarte, Eduardo Iáñez, José M Azorín
The analysis of electroencephalographic signals in frequency is usually not performed by transforms that can extract the instantaneous characteristics of the signal. However, the non-steady state nature of these low voltage electrical signals makes them suitable for this kind of analysis. In this paper a novel tool based on Stockwell transform is tested, and compared with techniques such as Hilbert-Huang transform and Fast Fourier Transform, for several healthy individuals and patients that suffer from lower limb disability...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29230520/ipsilesional-functional-recruitment-within-lower-mu-band-in-children-with-unilateral-cerebral-palsy-an-event-related-desynchronization-study
#4
Alberto Inuggi, Michela Bassolino, Chiara Tacchino, Valentina Pippo, Valeria Bergamaschi, Claudio Campus, Valentina De Franchis, Thierry Pozzo, Paolo Moretti
Cerebral palsy (CP) is a group of non-progressive developmental movement disorders inducing a strong brain reorganization in primary and secondary motor areas. Nevertheless, few studies have been dedicated to quantify brain pattern changes and correlate them with motor characteristics in CP children. In this context, it is very important to identify feasible and complementary tools able to enrich the description of motor impairments by considering their neural correlates. To this aim, we recorded the electroencephalographic activity and the corresponding event-related desynchronization (ERD) of a group of mild-to-moderate affected unilateral CP children while performing unilateral reach-to-grasp movements with both their paretic and non-paretic arms...
December 11, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29228338/operative-nuances-of-stereotactic-leksell-frame-based-depth-electrode-implantation
#5
Holger Joswig, Carolyn M Benson, Andrew G Parrent, Keith W MacDougall, David A Steven
Background: For intracranial electroencephalographic monitoring, stereotactically implanted depth electrodes are increasingly used at epilepsy centers around the world. Objective: To identify pearls and pitfalls from our experience with stereotactic Leksell (Elekta AB, Stockhom, Sweden) frame-based depth electrode implantation. Methods: An intraoperative video of the implantation technique was recorded. Results: A detailed description and a video on how to implant depth electrodes using the stereotactic Leksell frame is provided...
December 7, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29226305/association-between-scalp-and-intracerebral-electroencephalographic-seizure-onset-patterns-a-study-in-different-lesional-pathological-substrates
#6
Hideaki Tanaka, Hui Ming Khoo, François Dubeau, Jean Gotman
OBJECTIVE: Our purpose was to determine the correlation between scalp electroencephalography (EEG) and intracerebral EEG (iEEG) seizure-onset patterns in patients with focal lesional epilepsy to determine whether scalp seizure-onset patterns can be specific to intracerebral seizure-onset patterns and to lesion type. METHODS: We retrospectively analyzed 61 patients with focal epilepsy and a structural magnetic resonance imaging (MRI)-visible lesion, who first underwent extensive scalp recordings and then iEEG studies (stereo-EEG) for presurgical evaluation, and who showed an iEEG seizure onset in the lesional/perilesional area...
December 11, 2017: Epilepsia
https://www.readbyqxmd.com/read/29225535/myoclonus-after-cardiac-arrest-where-do-we-go-from-here
#7
Brin Freund, Peter W Kaplan
Prognostication after cardiac arrest often depends primarily on neurological function, and characterizing the extent of neurological injury hinges on neurophysiological testing and clinical neurological examination. The presence of early posthypoxic myoclonus (PHM) following cardiac arrest had been invariably associated with poor outcome, but more recent studies have shown that those with early PHM may survive with good neurological function. Electroencephalographic patterns suggestive of severe brain injury may be more valuable than the presence of PHM itself in portending poor functional status, and phenotyping PHM may also be useful in delineating benign and malignant forms...
September 2017: Epilepsy Currents
https://www.readbyqxmd.com/read/29225064/intracranial-high-%C3%AE-connectivity-distinguishes-wakefulness-from-sleep
#8
Ezequiel Mikulan, Eugenia Hesse, Lucas Sedeño, Tristán Bekinschtein, Mariano Sigman, María Del Carmen García, Walter Silva, Carlos Ciraolo, Adolfo M García, Agustín Ibáñez
Neural synchrony in the γ-band is considered a fundamental process in cortical computation and communication and it has also been proposed as a crucial correlate of consciousness. However, the latter claim remains inconclusive, mainly due to methodological limitations, such as the spectral constraints of scalp-level electroencephalographic recordings or volume-conduction confounds. Here, we circumvented these caveats by comparing γ-band connectivity between two global states of consciousness via intracranial electroencephalography (iEEG), which provides the most reliable measurements of high-frequency activity in the human brain...
December 7, 2017: NeuroImage
https://www.readbyqxmd.com/read/29221942/neurostimulant-use-is-associated-with-improved-survival-in-comatose-patients-after-cardiac-arrest-regardless-of-electroencephalographic-substrate
#9
Alexis Steinberg, Jon C Rittenberger, Maria Baldwin, John Faro, Alexandra Urban, Naoir Zaher, Clifton W Callaway, Jonathan Elmer
AIM: Identify EEG patterns that predict or preclude favorable response in comatose post-arrest patients receiving neurostimulants. METHODS: We examined a retrospective cohort of consecutive electroencephalography (EEG)-monitored comatose post-arrest patients. We classified the last day of EEG recording before neurostimulant administration based on continuity (continuous/discontinuous), reactivity (yes/no) and malignant patterns (periodic discharges, suppression burst, myoclonic status epilepticus or seizures; yes/no)...
December 5, 2017: Resuscitation
https://www.readbyqxmd.com/read/29215453/generalized-periodic-discharges-with-and-without-triphasic-morphology
#10
Ayham M Alkhachroum, Haifa Al-Abri, Alok Sachdeva, Sarita Maturu, Jennifer Waldron, Han Wang, Macym Rizvi, Guadalupe Fernandez-Baca Vaca, Hans O Lüders
PURPOSE: Generalized periodic discharges (GPDs) with a triphasic morphology have been associated with nonepileptic encephalopathies. We conducted the study to assess the reliability in which electroencephalographers can differentiate triphasic from nontriphasic periodic discharges and to evaluate for the presence of electroencephalogram and clinical characteristics that are associated with a higher risk of seizures. METHODS: We studied prospectively 92 patients between May 2016 and February 2017...
November 27, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29215045/auditory-closed-loop-stimulation-of-eeg-slow-oscillations-strengthens-sleep-and-signs-of-its-immune-supportive-function
#11
Luciana Besedovsky, Hong-Viet V Ngo, Stoyan Dimitrov, Christoph Gassenmaier, Rainer Lehmann, Jan Born
Sleep is essential for health. Slow wave sleep (SWS), the deepest sleep stage hallmarked by electroencephalographic slow oscillations (SOs), appears of particular relevance here. SWS is associated with a unique endocrine milieu comprising minimum cortisol and high aldosterone, growth hormone (GH), and prolactin levels, thereby presumably fostering efficient adaptive immune responses. Yet, whether SWS causes these changes is unclear. Here we enhance SOs in men by auditory closed-loop stimulation, i.e., by delivering tones in synchrony with endogenous SOs...
December 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/29214651/electroencephalography-and-behavior-patterns-during-experimental-status-epilepticus
#12
Ewa Lewczuk, Suchitra Joshi, John Williamson, Mouna Penmetsa, Sarah Shan, Jaideep Kapur
OBJECTIVE: To characterize the evolution of behavioral and electrographic seizures in an experimental electrical stimulation-based model of status epilepticus (SE) in C57Bl/6 mice, and to relate SE to various outcomes, including death and epileptogenesis. METHODS: SE was induced by continuous hippocampal stimulation and was evaluated by review of electroencephalographic recordings, spectral display, and behavior. RESULTS: Seizures were initially locked to the electrical trains but later became independent of them...
December 6, 2017: Epilepsia
https://www.readbyqxmd.com/read/29213509/comparative-analysis-of-the-electroencephalogram-in-patients-with-alzheimer-s-disease-diffuse-axonal-injury-patients-and-healthy-controls-using-loreta-analysis
#13
Jéssica Natuline Ianof, Francisco José Fraga, Leonardo Alves Ferreira, Renato Teodoro Ramos, José Luiz Carlos Demario, Regina Baratho, Luís Fernando Hindi Basile, Ricardo Nitrini, Renato Anghinah
Alzheimer's disease (AD) is a dementia that affects a large contingent of the elderly population characterized by the presence of neurofibrillary tangles and senile plaques. Traumatic brain injury (TBI) is a non-degenerative injury caused by an external mechanical force. One of the main causes of TBI is diffuse axonal injury (DAI), promoted by acceleration-deceleration mechanisms. Objective: To understand the electroencephalographic differences in functional mechanisms between AD and DAI groups...
April 2017: Dementia & Neuropsychologia
https://www.readbyqxmd.com/read/29210791/design-and-evaluation-of-a-closed-loop-anesthesia-system-with-robust-control-and-safety-system
#14
Nicholas West, Klaske van Heusden, Matthias Görges, Sonia Brodie, Aryannah Rollinson, Christian L Petersen, Guy A Dumont, J Mark Ansermino, Richard N Merchant
BACKGROUND: Closed-loop control of anesthesia involves continual adjustment of drug infusion rates according to measured clinical effect. The NeuroSENSE monitor provides an electroencephalographic measure of depth of hypnosis (wavelet-based anesthetic value for central nervous system monitoring [WAVCNS]). It has previously been used as feedback for closed-loop control of propofol, in a system designed using robust control engineering principles, which implements features specifically designed to ensure patient safety...
November 22, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29209389/asymmetrical-electroencephalographic-change-of-human-brain-during-sleep-onset-period
#15
Doo-Heum Park, Chul-Jin Shin
Objective: Human cerebral hemisphere is known to function asymmetrically with daytime left hemisphere superiority in most right-handed persons. It may have relevance to the localization of specific function of the brain. This study attempted to reveal whether the functional cerebral asymmetry in the wakeful state is still maintained throughout the sleep onset period. Methods: Thirty-channel EEG was recorded in 61 healthy subjects. The EEG power spectra of each of the seven frequencies were compared between the two kinds of 30-second states; the wakeful stage and the late-sleep stage 1...
November 2017: Psychiatry Investigation
https://www.readbyqxmd.com/read/29209195/the-patient-repository-for-eeg-data-computational-tools-pred-ct
#16
James F Cavanagh, Arthur Napolitano, Christopher Wu, Abdullah Mueen
Electroencephalographic (EEG) recordings are thought to reflect the network-wide operations of canonical neural computations, making them a uniquely insightful measure of brain function. As evidence of these virtues, numerous candidate biomarkers of different psychiatric and neurological diseases have been advanced. Presumably, we would only need to apply powerful machine-learning methods to validate these ideas and provide novel clinical tools. Yet, the reality of this advancement is more complex: the scale of data required for robust and reliable identification of a clinical biomarker transcends the ability of any single laboratory...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/29209149/electroencephalographic-evaluation-of-acoustic-therapies-for-the-treatment-of-chronic-and-refractory-tinnitus
#17
Luz María Alonso-Valerdi, David I Ibarra-Zarate, Francisco J Tavira-Sánchez, Ricardo A Ramírez-Mendoza, Manuel Recuero
Background: To date, a large number of acoustic therapies have been applied to treat tinnitus. The effect that produces those auditory stimuli is, however, not well understood yet. Furthermore, the conventional clinical protocol is based on a trial-error procedure, and there is not a formal and adequate treatment follow-up. At present, the only way to evaluate acoustic therapies is by means of subjective methods such as analog visual scale and ad-hoc questionnaires. Methods: This protocol seeks to establish an objective methodology to treat tinnitus with acoustic therapies based on electroencephalographic (EEG) activity evaluation...
2017: BMC Ear, Nose, and Throat Disorders
https://www.readbyqxmd.com/read/29199541/impact-of-temperature-on-the-narcotrend-index-during-hypothermic-cardiopulmonary-bypass-in-children-with-sevoflurane-anesthesia
#18
Nils Dennhardt, Christiane Beck, Dietmar Boethig, Sebastian Heiderich, Alexander Horke, Sebastian Tiedge, Martin Boehne, Robert Sümpelmann
BACKGROUND: During cardiopulmonary bypass (CPB) in children, anesthesia maintained by sevoflurane administered via the oxygenator is increasingly common. Anesthetic uptake and requirement may be influenced by the non-physiological conditions during hypothermic CPB. Narcotrend-processed EEG monitoring may, therefore, be useful to guide the administration of sevoflurane during this phase. OBJECTIVE: The objective of this prospective, clinical, observational study was to assess the correlation between body temperature, Narcotrend Index (NI) and administered sevoflurane in children during CPB...
December 1, 2017: Perfusion
https://www.readbyqxmd.com/read/29199073/theta-oscillations-in-the-human-medial-temporal-lobe-during-real-world-ambulatory-movement
#19
Zahra M Aghajan, Peter Schuette, Tony A Fields, Michelle E Tran, Sameed M Siddiqui, Nicholas R Hasulak, Thomas K Tcheng, Dawn Eliashiv, Emily A Mankin, John Stern, Itzhak Fried, Nanthia Suthana
The theta rhythm-a slow (6-12 Hz) oscillatory component of the local field potential-plays a critical role in spatial navigation and memory by coordinating the activity of neuronal ensembles within the medial temporal lobe (MTL). Although theta has been extensively studied in freely moving rodents, its presence in humans has been elusive and primarily investigated in stationary subjects. Here we used a unique clinical opportunity to examine theta within the human MTL during untethered, real-world ambulatory movement...
November 21, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29197341/frail-phenotype-is-associated-with-distinct-quantitative-electroencephalographic-findings-among-end-stage-renal-disease-patients-an-observational-study
#20
Chia-Ter Chao, Hsin-Jung Lai, Hung-Bin Tsai, Shao-Yo Yang, Jenq-Wen Huang
BACKGROUND: Frailty is prevalent among patients with end-stage renal disease (ESRD) and is associated with an increased risk of cognitive impairment. However, apart from its influence on cognition, it is currently unknown whether frailty affects subtler cerebral function in patients with ESRD. METHODS: Patients with ESRD were prospectively enrolled, with clinical features and laboratory data recorded. The severity of frailty among these patients with ESRD was ascertained using the previously validated simple FRAIL scale, and was categorized as none-to-mild and moderate-to-severe frailty...
December 2, 2017: BMC Geriatrics
keyword
keyword
96576
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"