Publications by authors named "S Demiral"

Pupil size and blink rates are heritable but the extent to which they interact with one another has not been properly investigated. Though changes in pupil size due to eye blinks have been reported, they are considered a pupillary artifact. In this study we used the HCP 7T fMRI dataset with resting state eye-tracking data obtained in monozygotic and dizygotic twins to assess their heritability and their interactions.

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  • Pupil size and blink rates are heritable traits, but their interactive relationship, specifically through blink-induced pupillary responses (BIPR), has not been comprehensively studied until now.
  • Using resting state eye-tracking data from twins, the research identifies consistent patterns in pupil dilation and constriction following blinks, indicating that these responses are tied to genetic factors and vigilance states.
  • The findings reveal that BIPR has significant heritable components, suggesting it is part of a broader genetic oculomotor system, called the Oculomotor Adaptive System (OAS), rather than just a random artifact.
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  • Sleep deprivation (SD) negatively impacts brain dynamics, leading to reduced dwell time and transition probabilities in specific brain states.
  • Researchers used functional magnetic resonance imaging and positron emission tomography to assess how SD affects brain activity and dopamine D receptor availability in individuals after one night of sleep deprivation.
  • The study concluded that SD alters brain state occurrence and increases the energy required for brain transitions, linking these changes to the distribution of dopamine receptors in the brain.
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Introduction: It is widely acknowledged that coaches and physical education teachers play an important role in supporting holistic development in children and ensuring optimal performance in the training processes carried out to acquire fundamental movements and sport-specific basic skills. However, there is a need for further information on how both groups utilize and value different teaching methods during the training. The present study aims to examine the perceptions of coaches and physical education teachers regarding the use and value of teaching methods.

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The vigilance state and the excitability of cortical networks impose wide-range effects on brain dynamics that arousal surges could promptly modify. We previously reported an association between spontaneous eye-blinks and BOLD activation in the brain arousal ascending network (AAN) and in thalamic nuclei based on 3T MR resting state brain images. Here we aimed to replicate our analyses using 7T MR images in a larger cohort of participants collected from the Human Connectome Project (HCP), which also contained simultaneous eye-tracking recordings, and to assess the interaction between the blink-associated arousal surges and the vigilance states.

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