Relation Between Voluntary Control of Alpha Activity Level Through Auditory Feedback and Degree of Eye Convergence

1975 ◽  
Author(s):  
Robert G. Eason ◽  
Roberta Sadler
Keyword(s):  
Auditory Feedback ◽  
Alpha Activity ◽  
Activity Level ◽  
Voluntary Control

Control of the Ratio of Midline Parietal to Midline Frontal Eeg Alpha Rhythms through Auditory Feedback

1973 ◽  
Vol 37 (3) ◽  
pp. 815-824
Author(s):  
David P. Nowlis ◽  
Edward C. Wortz
Keyword(s):  
Auditory Feedback ◽  
Single Channel ◽  
Test Period ◽  
Voluntary Control ◽  
Biofeedback Training ◽  
Feedback Training ◽  
Significant Control ◽  
Dual Channel ◽  
Channel Feedback ◽  
Eeg Alpha

The study asks whether voluntary control over the relative appearance of EEG alpha in midline frontal and parietal sites can be achieved with auditory biofeedback training. 16 Ss participated in the training and testing regimen. Ss varied in the number of hour-long single-channel feedback training sessions received. In the test period, dual-channel feedback was given, and Ss were asked to increase the ratio of frontal to parietal alpha and then the reverse. Evidence for small but significant control is presented. Amount of control was correlated with number of practice sessions.

Alpha activity: The influence of unpatterned light input and auditory feedback

Life Sciences ◽  
1975 ◽  
Vol 16 (5) ◽  
pp. 729-737 ◽  
Author(s):  
Gary Bridgwater ◽  
Clifford J. Sherry ◽  
Thaddeus J. Marczynski
Keyword(s):  
Auditory Feedback ◽  
Alpha Activity ◽  
Light Input

Leaching Behaviour of Low -Activity Alpha-Doped UO2.

2004 ◽  
Vol 824 ◽  
Author(s):  
Vincenzo V. Rondinella ◽  
Joaquin Cobos ◽  
Thierry Wiss
Keyword(s):  
Room Temperature ◽  
High Surface ◽  
Alpha Activity ◽  
Activity Level ◽  
Activity Levels ◽  
Spent Fuel ◽  
Alpha Emitters ◽  
Leaching Behaviour ◽  
Carbonated Water ◽  
Low Activity

AbstractSo-called alpha-doped UO2(i.e. UO2containing short-lived alpha-emitters) can reproduce the activity levels of spent fuel at different ages. Previous experiments showed significant effects of alpha-radiolysis at relatively high alpha-activity levels (e.g., in the range 108– 1010Bq/g). This study shows the results of leaching tests done on low alpha-activity material (106– 107Bq/g). UO2containing ∼10 and ∼1 wt. %233U was leached at room temperature in deionized and carbonated water under deaerated conditions. Higher release in carbonated water was observed. A clear radiolytic enhancement of the concentration of uranium in solution was observed for the material containing 10 wt. %233U. The dissolved U concentration was very close to the values previously observed for higher activity alpha-doped UO2and confirmed the finding that under relatively high surface/volume condition the measured amount of U in solution is essentially independent of the alpha-activity level. No significant radiolysis effect was detected for the material doped with 1%233U compared to undoped UO2after ∼4 months of leaching. The post- leaching SEM examination revealed no pronounced etching of the surfaces.

Voluntary Alpha Control, Visually Evoked Potentials, and Peripheral Physiological Indicants of Activation

1977 ◽  
Vol 44 (2) ◽  
pp. 491-496 ◽  
Author(s):  
Roberta R. Sadler ◽  
Robert G. Eason
Keyword(s):  
Evoked Potentials ◽  
Auditory Feedback ◽  
Alpha Activity ◽  
Cortical Activation ◽  
Visually Evoked Potentials ◽  
Eyes Closed ◽  
Activation Level ◽  
Bodily Arousal ◽  
Induced Changes

To test the hypothesis that voluntary alpha control is mediated in part through self-induced changes in cortical activation level and bodily arousal, changes in several physiological indicants of such activity were systematically examined as a function of the voluntary enhancement and suppression of scalp-recorded alpha activity. Following pre-training, 6 subjects attempted to either produce or suppress alpha with eyes closed while receiving continuous auditory feedback of their alpha levels. The results were interpreted as offering tentative support for the hypothesis.

Specificity determinants of phosphoprotein phosphatases controlling kinetochore functions

2020 ◽  
Vol 64 (2) ◽  
pp. 325-336 ◽  
Author(s):  
Dimitriya H. Garvanska ◽  
Jakob Nilsson
Keyword(s):  
Spindle Assembly Checkpoint ◽  
Activity Level ◽  
Phosphorylation Sites ◽  
Binding Affinities ◽  
Mitotic Kinases ◽  
Anaphase Onset ◽  
Phosphoprotein Phosphatases ◽  
Linear Motifs ◽  
Temporal And Spatial ◽  
Kinetochore Function

Abstract Kinetochores are instrumental for accurate chromosome segregation by binding to microtubules in order to move chromosomes and by delaying anaphase onset through the spindle assembly checkpoint (SAC). Dynamic phosphorylation of kinetochore components is key to control these activities and is tightly regulated by temporal and spatial recruitment of kinases and phosphoprotein phosphatases (PPPs). Here we focus on PP1, PP2A-B56 and PP2A-B55, three PPPs that are important regulators of mitosis. Despite the fact that these PPPs share a very similar active site, they target unique ser/thr phosphorylation sites to control kinetochore function. Specificity is in part achieved by PPPs binding to short linear motifs (SLiMs) that guide their substrate specificity. SLiMs bind to conserved pockets on PPPs and are degenerate in nature, giving rise to a range of binding affinities. These SLiMs control the assembly of numerous substrate specifying complexes and their position and binding strength allow PPPs to target specific phosphorylation sites. In addition, the activity of PPPs is regulated by mitotic kinases and inhibitors, either directly at the activity level or through affecting PPP–SLiM interactions. Here, we discuss recent progress in understanding the regulation of PPP specificity and activity and how this controls kinetochore biology.

Delayed Auditory Feedback with Different Delay Times at Each Ear

1964 ◽  
Vol 7 (4) ◽  
pp. 369-371
Author(s):  
Samuel Fillenbaum
Keyword(s):  
Delay Interval ◽  
Auditory Feedback ◽  
Normal Subjects ◽  
Delayed Auditory Feedback ◽  
Delay Times

Binaurally asynchronous delayed auditory feedback (DAF) was compared with synchronous DAF in 80 normal subjects. Asynchronous DAF (0.10 sec difference) did not yield results different from those obtained under synchronous DAF with a 0.20 sec delay interval, an interval characteristically resulting in maximum disruptions in speech.

Effects of Noise and Increased Vocal Intensity on Stuttering

1977 ◽  
Vol 20 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Sharon F. Garber ◽  
Richard R. Martin
Keyword(s):  
Normal Level ◽  
Auditory Feedback ◽  
Concomitant Increase ◽  
Vocal Intensity ◽  
Presence And Absence

The present study was designed to assess the effects of increased vocal level on stuttering in the presence and absence of noise, and to assess the effects of noise on stuttering with and without a concomitant increase in vocal level. Accordingly, eight adult stutterers spoke in quiet with normal vocal level, in quiet with increased vocal level, in noise with normal level, and in noise with increased level. All subjects reduced stuttering in noise compared with quiet conditions. However, there was no difference in stuttering when subjects spoke with normal compared with increased vocal level. In the present study, reductions in stuttering under noise could not be explained by increases in vocal level. It appears, instead, that reductions in stuttering were related to a decrease in auditory feedback. The condition which resulted in the largest decrease in auditory feedback, speaking in noise with a normal level, also resulted in the largest decrease in stuttering.

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