Sökning: "electroencephalography EEG"

Visar resultat 11 - 15 av 30 avhandlingar innehållade orden electroencephalography EEG.

1. 11. Indicators and predictors of sleepiness

   Författare :Johannes van den Berg; Ulf Landström; Gregory Neely; Anders Knutsson; Palle Ørbæk; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Public health; Sleep Scale KSS ; Category-Ratio Scale CR-10 ; sleepiness; sleep; driving; indicator; sleep debt; heart rate variability; electroencephalography EEG ; head movements; performance; truck drivers; sleep habits; predictor; Folkhälsomedicin; Public health medicine research areas; Folkhälsomedicinska forskningsområden;

   Sammanfattning : Sleep is a basic need as important as physical fitness and good nutrition. Without enough sleep, we will create a sleep debt and experience sleepiness. Sleepiness can be defined as the inability to stay awake, a condition that has become a health problem in our 24-hour-7-day-a-week society. LÄS MER

3. 12. Electrophysiological correlates of consciousness

   Författare :Rasmus Eklund; Stefan Wiens; Mats Nilsson; Antti Revonsuo; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; neural correlates of consciousness; electroencephalography; event-related potentials; visual awareness negativity; auditory awareness negativity; recurrent processing; phenomenal consciousness; access consciousness; Psychology; psykologi;

   Sammanfattning : How does the brain enable us to experience seeing or hearing a stimulus? If a stimulus is repeatedly presented at the awareness threshold, subjects will report that they are aware of the stimulus on half of the presentations. Electroencephalography (EEG) can be used to non-invasively record neural activity as event-related potentials (ERPs). LÄS MER

4. 13. Age and Constraints on Language Learning : First Language Retention and Second Language Acquisition in International Adoptees

   Författare :Gunnar Norrman; Emanuel Bylund Spångberg; Guillaume Thierry; Janet Werker; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bilingualism; critical period; electroencephalography; event-related potentials; first language retention; international adoption; phonology; second language acquisition; Bilingualism; tvåspråkighet;

   Sammanfattning : This thesis investigates the influence of age of acquisition on the long-term second language development of international adoptees. Because age of acquisition typically coincides with the onset of bilingualism, the study of maturational age effects in second language acquisition has been empirically and conceptually entangled with changes in language input and use. LÄS MER

5. 14. Non-invasive EEG Functional Neuroimaging for Localizing Epileptic Brain Activity

   Författare :Yazdan Shirvany; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Somatosensory Evoked Potentials; Forward Problem; Inverse Problem; Mathematical Dipole; Epileptic Spike; Functional Neuroimaging; Structural Magnetic Resonance Imaging; Particle Swarm Optimization; Source localization; Finite Element Method; Non-invasive EEG;

   Sammanfattning : Epilepsy is one of the most common neurologic diseases in the world, and is present in up to 1% of the world’s population. Many patients with epilepsy never receive the treatment which make them seizure free. Surgical therapy has become an important therapeutic alternative for patients with drug resistant epilepsy. LÄS MER

7. 15. Unsupervised Segmentation of Head Tissues from Multi-Modal Magnetic Resonance Images: With Application to EEG Source Localization and Stroke Detection

   Författare :Mahmood Qaiser; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; stroke; EEG source localization; Image segmentation; reconstruction; magnetic resonance; brain;

   Sammanfattning : The automated segmentation or labeling of individual tissues in magnetic resonance (MR) images of the human head is an essential first step in several biomedical applications. The resulting segmentation yields a patient-specific labeling of individual tissues that can be used to quantitatively characterize these tissues (e.g. LÄS MER