312 research outputs found
Alterations in Event Related Potentials (ERP) Associated with Tinnitus Distress and Attention
Get PDFTinnitus related distress corresponds to different degrees of attention paid to the tinnitus. Shifting attention to a signal other than the tinnitus is therefore particularly difficult for patients with high tinnitus related distress. As attention effects on Event Related Potentials (ERP) have been shown this should be reflected in ERP measurements (N100, phase locking). In order to prove this hypothesis single sweep ERP recordings were obtained in 41 tinnitus patients as well as 10 control subjects during a period of time when attention was shifted to a tone (attended) and during a second phase (unattended) when they did not focus attention to the tone. Whereas tinnitus patients with low distress showed a significant reduction in both N100 amplitude and phase locking when comparing the attended and unattended measurement condition a group of patients with high tinnitus related distress did not show such ERP alterations. Using single sweep ERP measurements the results of our study show, that attention in high tinnitus related distress patients is captured by their tinnitus significantly more than in low distress patients. Furthermore our results provide the basis for future neurofeedback based tinnitus therapies aiming at maximizing the ability to shift attention away from the tinnitus. © 2008 The Author(s)
Objective quantification of the tinnitus decompensation by synchronization measures of auditory evoked single sweeps
No full textLarge-scale neural correlates of the tinnitus decompensation might be used for an objective evaluation of therapies and neurofeedback based therapeutic approaches. In this study, we try to identify large-scale neural correlates of the tinnitus decompensation using wavelet phase stability criteria of single sweep sequences of late auditory evoked potentials as synchronization stability measure. The extracted measure provided an objective quantification of the tinnitus decompensation and allowed for a reliable discrimination between a group of compensated and decompensated tinnitus patients. We provide an interpretation for our results by a neural model of top-down projections based on the Jastreboff tinnitus model combined with the adaptive resonance theory which has not been applied to model tinnitus so far. Using this model, our stability measure of evoked potentials can be linked to the focus of attention on the tinnitus signal. It is concluded that the wavelet phase stability of late auditory evoked potential single sweeps might be used as objective tinnitus decompensation measure and can be interpreted in the framework of the Jastreboff tinnitus model and adaptive resonance theory
Fuluote xin li fen xi.
No full text(英) B. 勒 (B. Low) 著 ; 趙演譯.附: 弗洛伊德近著介紹及譯記.Translation of: Psycho-analysis: a brief account of the Freudian theory.1933 guo nan hou 1 ban. 1935 guo nan hou 2 ban.(Ying) B. Le (B. Low) zhu ; Zhao Yan yi.Fu: Fuluoyide jin zhu jie shao ji yi ji
Medical Image Compression Using Wavelets : Objective And Subjective Evaluations
No full textIn this project we would like to examine and compare the diffrerence in impact and quality of the wavelet functions (wavelets) to image quality for implementation in a digitized still medical image compression with different modalities
Fen mapping for the Rio Grande National Forest
Get PDFPrepared for: Rio Grande National Forest.April 2016.Includes bibliographical references (pages 27-28).The Rio Grande National Forest (RGNF) covers nearly two million acres within the Rio Grande Headwaters River Basin in south central Colorado. The diverse geography of the RGNF created an equally diverse set of wetlands that provide important ecological services to both RGNF and lands downstream. Organic soil wetlands known as fens are an irreplaceable resource that the U.S. Forest Service has determined should be managed for conservation and restoration. Fens are defined as groundwater-fed wetlands with organic soils that typically support sedges and low stature shrubs. In the arid west, organic soil formation can take thousands of years. Long-term maintenance of fens requires maintenance of both the hydrology and the plant communities that enable fen formation. ... The Rio Grande National Forest contains a rich resource of fen wetlands. This report and associated dataset provide the RGNF with a critical tool for conservation planning at both a local and Forest-wide scale. These data will be useful for the ongoing RGNF biological assessment required by the 2012 Forest Planning Rule, but can also be used for individual management actions, such as planning for timber sales, grazing allotments, and trail maintenance. Wherever possible, the Forest should avoid direct disturbance to the fens mapped through this project, and should also strive to protect the watersheds surrounding high concentrations of fens, thereby protecting their water sources
A Performance Study of the Wavelet-Phase Stability in the Quantification of Neural Correlates of Auditory Selective Attention
Get PDFLarge–scale neural correlates of auditory selective
attention reflected in the electroencephalogram (EEG) have been identified by using the complex wavelet–phase stability measure (WPS). In this paper, we study the feasibility of using the WPS in extracting the correlates of selective attention by comparing its performance to the widely used linear interdependency measures, i.e., the wavelet coherence and the correlation coefficient. The outcome reveals that the phase measure outperforms the others in discriminating the attended and unattended single sweep auditory late responses (ALRs). Particularly, the number of response sweeps that are needed to perform the differentiation is
largely reduced by using the proposed measure. It is concluded that a faster (in terms of using fewer sweeps) and more robust objective quantification of selective attention can be achieved by using the phase stability measure
Assessment of Cortical Inhibition in Adult Attention-Deficit/Hyperactivity Disorder by Paired-Chirp Auditory Evoked Potentials
Get PDFIn order to further research cortical impairment
in ADHD patients, late auditory evoked potentials were
measured. By using paired-chirp auditory late responses, we
compared the ADHD group against a control group, focusing
on the inhibition elicited by the stimuli. The results show overall smaller amplitudes in the N100 and P200 waves, as well as a reduced inhibition in test chirp for ADHD patients. A frequency study using the wavelet phase synchronization stability transform was made in order to strengthen the results, as well as
analysis of variance test for frequency and reproducibility index for amplitude. Both amplitude and frequency show there is an impaired auditory inhibition for ADHD patients for 500 and 700 ms, and contribute to demonstrate that impairments in this condition are present in multiple cortical areas
Effects of Yoga on Psychological Health, Quality of Life, and Physical Health of Patients with Cancer: A Meta-Analysis
Get PDFYoga is one of the most widely used complementary and alternative medicine therapies to manage illness. This meta-analysis aimed to determine the effects of yoga on psychological health, quality of life, and physical health of patients with cancer. Studies were identified through a systematic search of seven electronic databases and were selected if they used a randomized controlled trial design to examine the effects of yoga in patients with cancer. The quality of each article was rated by two of the authors using the PEDro Scale. Ten articles were selected; their PEDro scores ranged from 4 to 7. The yoga groups compared to waitlist control groups or supportive therapy groups showed significantly greater improvements in psychological health: anxiety (P=.009), depression (P=.002), distress (P=.003), and stress (P=.006). However, due to the mixed and low to fair quality and small number of studies conducted, the findings are preliminary and limited and should be confirmed through higher-quality, randomized controlled trials.</jats:p
Fen mapping for the Salmon-Challis National Forest
Get PDFPrepared for: Salmon-Challis National Forest.December 2017.Includes bibliographical references.The Salmon-Challis National Forest (SCNF) covers 4.3 million acres in five discontinuous units within east-central Idaho. Wetlands within the SCNF provide important ecological services to both the Forest and lands downstream. Organic soil wetlands, known as fens, are an irreplaceable resource that the U.S. Forest Service has determined should be managed for conservation and restoration. Fens are defined as groundwater-fed wetlands with organic soils that typically support sedges and low stature shrubs. In the arid west, organic soil formation can take thousands of years. Long-term maintenance of fens requires maintenance of both the hydrology and the plant communities that enable fen formation. ... This report and associated dataset provide the SCNF with a critical tool for conservation planning at both a local and Forest-wide scale. These data will be useful for the ongoing SCNF biological assessment required by the 2012 Forest Planning Rule, but can also be used for individual management actions, such as planning for timber sales, grazing allotments, and trail maintenance. Wherever possible, the Forest should avoid direct disturbance to the fens mapped through this project, and should also strive to protect the watersheds surrounding high concentrations of fens, thereby protecting their water sources
Analysis Of AirAsia's business model and its sustainability.
No full textThe Low Cost Carrier Market in Asia Pacific is facing stiff competition amidst the changing consumer demands and aviation landscape, resulting in a need to push boundaries further using branding. Airline Company AirAsia has seen the importance of gaining a competitive advantage through maintaining strong cost leadership and differentiation strategies. This report will purport the current business model of AirAsia, along with a comparison to that of its distinctive competitors, and analyze which aspects the airline’s considerable success at present can be attributed to. Moreover, the ability to obtain success from these strategies in the long run will be discussed. This will not only help to determine AirAsia’s ability to obtain a sustainable brand and market leadership position, it will also serve as learning points for Low Cost Carriers within Asia Pacific industry .BUSINES
- …
