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https://www.readbyqxmd.com/read/28227982/analysis-of-the-sleep-eeg-in-the-complexity-domain
#1
Sara Mariani, Ana F T Borges, Teresa Henriques, Robert J Thomas, Samuel J Leistedt, Paul Linkowski, Jean-Pol Lanquart, Ary L Goldberger, Madalena D Costa, Sara Mariani, Ana F T Borges, Teresa Henriques, Robert J Thomas, Samuel J Leistedt, Paul Linkowski, Jean-Pol Lanquart, Ary L Goldberger, Madalena D Costa, Teresa Henriques, Robert J Thomas, Madalena D Costa, Samuel J Leistedt, Paul Linkowski, Ary L Goldberger, Jean-Pol Lanquart, Sara Mariani, Ana F T Borges
Conventional sleep analysis relies primarily on electroencephalogram (EEG) waveform features assessed in concert with eye movements, respiration and muscle tone. We explore a complementary "complexity domain" approach based on multiscale entropy (MSE) analysis of EEG signals and discuss its relationships to standard sleep analysis and to that based on electrocardiogram (ECG)-derived cardiopulmonary coupling (CPC). We observe a progressive decrease in complexity associated with decreased arousability, as measured by both conventional sleep scoring and CPC analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227883/development-and-validation-of-thums-version-5-with-1d-muscle-models-for-active-and-passive-automotive-safety-research
#2
Hideyuki Kimpara, Yuko Nakahira, Masami Iwamoto, Hideyuki Kimpara, Yuko Nakahira, Masami Iwamoto, Hideyuki Kimpara, Masami Iwamoto, Yuko Nakahira
Accurately predicting the occupant kinematics is critical to better understand the injury mechanisms during an automotive crash event. The objectives of this study were to develop and validate a finite element (FE) model of the human body integrated with an active muscle model called Total HUman Model for Safety (THUMS) version 5, which has the body size of the 50th percentile American adult male (AM50). This model is characterized by being able to generate a force owing to muscle tone and to predict the occupant response during an automotive crash event...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227803/ear-eeg-allows-extraction-of-neural-responses-in-challenging-listening-scenarios-a-future-technology-for-hearing-aids
#3
L Fiedler, J Obleser, T Lunner, C Graversen, L Fiedler, J Obleser, T Lunner, C Graversen, J Obleser, C Graversen, L Fiedler, T Lunner
Advances in brain-computer interface research have recently empowered the development of wearable sensors to record mobile electroencephalography (EEG) as an unobtrusive and easy-to-use alternative to conventional scalp EEG. One such mobile solution is to record EEG from the ear canal, which has been validated for auditory steady state responses and discrete event related potentials (ERPs). However, it is still under discussion where to place recording and reference electrodes to capture best responses to auditory stimuli...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227375/motion-invariant-contrast-enhancement-of-optical-imaging-data-in-the-gradient-domain
#4
Philipp Flotho, Alejandro Romero-Santiago, Karsten Schwerdtfeger, Jacek Szczygielski, Matthias Hulser, Lars Haab, Daniel J Strauss, Philipp Flotho, Alejandro Romero-Santiago, Karsten Schwerdtfeger, Jacek Szczygielski, Matthias Hulser, Lars Haab, Daniel J Strauss, Daniel J Strauss, Alejandro Romero-Santiago, Jacek Szczygielski, Karsten Schwerdtfeger, Philipp Flotho, Lars Haab
Functional optical imaging (OI) of intrinsic signals (like blood oxygenation coupled reflection changes) and of extrinsic properties of voltage sensitive probes (like voltage-sensitive dyes (VSD)) forms a group of neuroimaging techniques that possess up to date highest temporal and spatial resolution on a meso-to macroscopic scale. An inherent problem of OI is a very low signal to noise ratio (SNR), which restricts the recordings to be completely motionless and requires detailed knowledge of the properties of the different noise sources...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227250/assessment-of-frequency-specific-auditory-steady-state-response-using-amplitude-modulation-with-2-order-exponential-envelope
#5
Pablo Cevallos-Larrea, Thobias Pereira, Wagner Santos, Silvana M Frota, Antonio F Infantosi, Roberto M Ichinose, Carlos Tierra-Criollo, Pablo Cevallos-Larrea, Thobias Pereira, Wagner Santos, Silvana M Frota, Antonio F Infantosi, Roberto M Ichinose, Carlos Tierra-Criollo, Pablo Cevallos-Larrea, Wagner Santos, Silvana M Frota, Carlos Tierra-Criollo, Antonio F Infantosi, Thobias Pereira, Roberto M Ichinose
This study investigated the performance of Frequency Specific Auditory Steady-State Response (FS-ASSR) detection elicited by the amplitude modulated tone with 2-order exponential envelope (AM(2)), using objective response detection (ORD) techniques of Spectral F-Test (SFT) and Magnitude Squared Coherence (MSC). ASSRs from 24 normal hearing adults were obtained during binaural multi-tone stimulation of amplitude-modulation (AM) and AM(2) at intensities of 60, 45 and 30 dBSPL. The carrier frequencies were 500, 1000, 2000, and 4000 Hz, modulated between 77 and 105 Hz...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227131/sound-preference-test-in-animal-models-of-addicts-and-phobias
#6
Ryo Soga, Tomoyo I Shiramatsu, Ryohei Kanzaki, Hirokazu Takahashi, Ryo Soga, Tomoyo I Shiramatsu, Ryohei Kanzaki, Hirokazu Takahashi, Tomoyo I Shiramatsu, Ryohei Kanzaki, Ryo Soga, Hirokazu Takahashi
Biased or too strong preference for a particular object is often problematic, resulting in addiction and phobia. In animal models, alternative forced-choice tasks have been routinely used, but such preference test is far from daily situations that addicts or phobic are facing. In the present study, we developed a behavioral assay to evaluate the preference of sounds in rodents. In the assay, several sounds were presented according to the position of free-moving rats, and quantified the sound preference based on the behavior...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227117/altered-viscoelastic-properties-of-stroke-affected-muscles-estimated-using-ultrasound-shear-waves-preliminary-data
#7
Ghulam Rasool, Allison B Wang, William Z Rymer, Sabrina S M Lee, Ghulam Rasool, Allison B Wang, William Z Rymer, Sabrina S M Lee, Ghulam Rasool, Sabrina S M Lee, Allison B Wang, William Z Rymer
As a result of a brain injury such as stroke, the skeletal muscles may undergo numerous structural and functional alterations. These abnormal changes are linked to muscle weakness, joint contracture, and abnormal muscle tone and eventually, result in motor impairment. A subset of these alterations affects passive muscle stiffness, i.e., viscoelastic properties. However, in vivo estimation of changes in viscoelastic properties is a challenging task. Here, we used the shear wave velocity, estimated through ultrasound SuperSonic imaging (SSI), as a surrogate for viscoelastic properties...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226871/identifying-depressed-patients-with-and-without-suicidal-ideation-by-finger-photo-plethysmography
#8
A H Khandoker, V Luthra, Y Abouallaban, S Saha, K I Ahmed, R Mostafa, N Chowdhury, H F Jelinek, A H Khandoker, V Luthra, Y Abouallaban, S Saha, K I Ahmed, R Mostafa, N Chowdhury, H F Jelinek, A H Khandoker, R Mostafa, H F Jelinek, N Chowdhury, Y Abouallaban, S Saha, K I Ahmed, V Luthra
Major Depressive Disorder (MDD) is a serious mental disorder that if untreated not only affects physical health but also has a high risk of suicide. While the neurophysiological phenomena that contribute to the formation of Suicidal Ideation (SI) are still ill-defined, clear links between MDD and cardiovascular disease have been reported. The aim of this study is to extract suitable features from arterial pulse signals with a view to predicting SI within MDD and control groups. Sixteen unmedicated MDD patients with a history of SI (MDDSI+), sixteen without SI (MDDSI-) and twenty-nine healthy subjects (CONT) were recruited at a psychiatric clinic in the UAE...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226821/cortical-auditory-evoked-potentials-caeps-represent-neural-cues-relevant-to-pitch-perception
#9
Xiaochen Zhang, Qin Gong, Tao Zhang, Xiaochen Zhang, Qin Gong, Tao Zhang, Xiaochen Zhang, Tao Zhang, Qin Gong
Components of auditory event-related potentials (ERPs) may represent various aspects of the cortical processing of pitch. However, evidence hints an earlier representation of pitch perception in auditory ERPs of cortical origin. In this study, we examined whether earlier waves in cortical auditory evoked potentials (CAEPs) might reflect pitch-relevant features of both listeners and stimuli. CAEPs were elicited by pure tones and sweeping tones, and individual behavioral performance in pitch discrimination reflected by frequency difference limen (FDL) was also measured...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226816/neural-representation-of-different-mandarin-tones-in-the-inferior-colliculus-of-the-guinea-pig
#10
Fei Peng, Nan Xia, Xing Wang, Xiao L Zheng, Yi Zhou, Xing Y Fan, Wen S Hou, Fei Peng, Nan Xia, Xing Wang, Xiao L Zheng, Yi Zhou, Xing Y Fan, Wen S Hou, Xing Y Fan, Nan Xia, Wen S Hou, Xing Wang, Yi Zhou, Fei Peng, Xiao L Zheng
Mandarin speech has four different tones and the coding mechanism underlying tone identification still remain unclear. Here in the inferior colliculus (IC) of anesthetized guinea pigs, we recorded single neuron activities to one word with four tones using tungsten electrode. Peri-stimulus time histograms (PSTHs) and inter-spike-interval (ISI) were used to evaluate the neural response. The results showed that PSTHs grouped into frequency band reflected the spectrotemporal patterns of different tones; average population PSTHs matched envelops of different tones; and the peaks of histogram of ISIs in three time segments exhibited a displacement which reflected the profile of fundamental frequency (F0)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226768/thalamic-gamma-band-desynchronization-in-a-computational-model-of-the-auditory-pathway
#11
Ana E Uriarte, Lars Haab, Narsis Salafzoon, Daniel J Strauss, Ana E Uriarte, Lars Haab, Narsis Salafzoon, Daniel J Strauss, Ana E Uriarte, Lars Haab, Narsis Salafzoon, Daniel J Strauss
Recent studies have focused on modeling the response of the early auditory processing stages to sound stimuli. However, the influence of sound on the higher stages like the auditory thalamus are not well identified. To understand how different sound stimuli affect the response of neurons in these higher stages, it is necessary to model the auditory pathway from the auditory nerve (AN) through the different stages up to the cortex. In this article we present a model of one of the paths through which sound travels from the AN to the cortex...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226697/differences-in-white-matter-microstructure-between-parkinson-s-disease-patients-with-and-without-rem-sleep-behavior-disorder
#12
Farzaneh Rahmani, Mina Ansari, Atefeh Pooyan, Mehdi M Mirbagheri, Mohammad Hadi Aarabi, Farzaneh Rahmani, Mina Ansari, Atefeh Pooyan, Mehdi M Mirbagheri, Mohammad Hadi Aarabi, Mehdi M Mirbagheri, Farzaneh Rahmani, Atefeh Pooyan, Mina Ansari, Mohammad Hadi Aarabi
REM sleep behavior disorder (RBD) is characterized by increased muscle tone and violent limb movements and usually occurs during the early stages of Parkinson disease (PD). PD patients with RBD represent faster motor progression and cognitive dysfunction. We used diffusion imaging to assess which regions are involved in this phenomenon. In the current study, we computed Quantitative Anisotropic (QA), which is based on spin distribution function (SDF) that quantifies the density of diffusing water and is more sensitive to psychological differences between groups and also diffusion MRI connectometry to conduct group analysis between age and gender matched PD patients with and without RBD...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226651/comparison-of-pulse-rate-variability-and-heart-rate-variability-for-high-frequency-content-estimation
#13
R Logier, J De Jonckheere, A Dassonneville, M Jeanne, R Logier, J De Jonckheere, A Dassonneville, M Jeanne, A Dassonneville, J De Jonckheere, R Logier, M Jeanne
Heart Rate Variability (HRV) analysis can be of precious help in most of clinical situations because it is able to quantify the Autonomic Nervous System (ANS) activity. The HRV high frequency (HF) content, related to the parasympathetic tone, reflects the ANS response to an external stimulus responsible of pain, stress or various emotions. We have previously developed the Analgesia Nociception Index (ANI), based on HRV high frequency content estimation, which quantifies continuously the vagal tone in order to guide analgesic drug administration during general anesthesia...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226574/a-temperature-controlled-glove-with-non-invasive-arterial-pulse-sensing-for-active-neuro-vascular-assessment
#14
Andrew M Carek, Omer T Inan, Andrew M Carek, Omer T Inan, Andrew M Carek, Omer T Inan
A non-invasive, active neuro-vascular assessment system was developed using a modified temperature-controlled glove and feedback techniques. The glove incorporates local heating and cooling of the hand using multi-point skin temperature measurements as feedback, and thereby induces local and central mechanisms involved in thermoregulation. Electrocardiogram (ECG), photoplethysmogram (PPG) and non-invasive finger-cuff based blood pressure (BP) measurements were used to monitor electrophysiology and hemodynamic changes in response to temperature modulation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226198/olanzapine-induced-early-cardiovascular-effects-are-mediated-by-the-biological-clock-and-prevented-by-melatonin
#15
Francisco Romo-Nava, Frederik N Buijs, Marcela Valdés-Tovar, Gloria Benítez-King, MariCarmen Basualdo, Mercedes Perusquía, Gerhard Heinze, Carolina Escobar, Ruud M Buijs
Second generation antipsychotics (SGA) are associated with adverse cardiometabolic side-effects contributing to premature mortality in patients. While mechanisms mediating these cardiometabolic side-effects remain poorly understood, three independent studies recently demonstrated that melatonin was protective against cardiometabolic risk in SGA-treated patients. Since one of the main target areas of circulating melatonin in the brain is the suprachiasmatic nucleus (SCN), we hypothesized that the SCN is involved in SGA-induced early cardiovascular effects in Wistar rats...
February 22, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28225796/what-can-we-learn-about-beat-perception-by-comparing-brain-signals-and-stimulus-envelopes
#16
Molly J Henry, Björn Herrmann, Jessica A Grahn
Entrainment of neural oscillations on multiple time scales is important for the perception of speech. Musical rhythms, and in particular the perception of a regular beat in musical rhythms, is also likely to rely on entrainment of neural oscillations. One recently proposed approach to studying beat perception in the context of neural entrainment and resonance (the "frequency-tagging" approach) has received an enthusiastic response from the scientific community. A specific version of the approach involves comparing frequency-domain representations of acoustic rhythm stimuli to the frequency-domain representations of neural responses to those rhythms (measured by electroencephalography, EEG)...
2017: PloS One
https://www.readbyqxmd.com/read/28225735/evaluating-the-precision-of-auditory-sensory-memory-as-an-index-of-intrusion-in-tinnitus
#17
Doug J K Barrett, Michael Pilling
OBJECTIVES: The purpose of this study was to investigate the potential of measures of auditory short-term memory (ASTM) to provide a clinical measure of intrusion in tinnitus. DESIGN: Response functions for six normal listeners on a delayed pitch discrimination task were contrasted in three conditions designed to manipulate attention in the presence and absence of simulated tinnitus: (1) no-tinnitus, (2) ignore-tinnitus, and (3) attend-tinnitus. RESULTS: Delayed pitch discrimination functions were more variable in the presence of simulated tinnitus when listeners were asked to divide attention between the primary task and the amplitude of the tinnitus tone...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28225734/auditory-performance-and-electrical-stimulation-measures-in-cochlear-implant-recipients-with-auditory-neuropathy-compared-with-severe-to-profound-sensorineural-hearing-loss
#18
Joseph Attias, Tally Greenstein, Miriam Peled, David Ulanovski, Jay Wohlgelernter, Eyal Raveh
OBJECTIVES: The aim of the study was to compare auditory and speech outcomes and electrical parameters on average 8 years after cochlear implantation between children with isolated auditory neuropathy (AN) and children with sensorineural hearing loss (SNHL). DESIGN: The study was conducted at a tertiary, university-affiliated pediatric medical center. The cohort included 16 patients with isolated AN with current age of 5 to 12.2 years who had been using a cochlear implant for at least 3...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28225424/committee-opinion-no-689-delivery-of-a-newborn-with-meconium-stained-amniotic-fluid
#19
(no author information available yet)
In 2006, the American Academy of Pediatrics and the American Heart Association published the 2005 guidelines on neonatal resuscitation. Before the 2005 guidelines, management of a newborn with meconium-stained amniotic fluid included suctioning of the oropharynx and nasopharynx on the perineum after the delivery of the head but before the delivery of the shoulders. The 2005 guidelines did not support this practice because routine intrapartum suctioning does not prevent or alter the course of meconium aspiration syndrome in vigorous newborns...
March 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28225419/committee-opinion-no-689-summary-delivery-of-a-newborn-with-meconium-stained-amniotic-fluid
#20
(no author information available yet)
In 2006, the American Academy of Pediatrics and the American Heart Association published the 2005 guidelines on neonatal resuscitation. Before the 2005 guidelines, management of a newborn with meconium-stained amniotic fluid included suctioning of the oropharynx and nasopharynx on the perineum after the delivery of the head but before the delivery of the shoulders. The 2005 guidelines did not support this practice because routine intrapartum suctioning does not prevent or alter the course of meconium aspiration syndrome in vigorous newborns...
March 2017: Obstetrics and Gynecology
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