Sökning: "smooth pursuit eye movements"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden smooth pursuit eye movements.

1. 1. Delayed Development of Visuomotor Capacity in Very Preterm Infants

   Författare :Katarina Strand Brodd; Uwe Ewald; Gerd Holmström; Bo Strömberg; Claes von Hofsten; Louise Rönnqvist; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; preterm infants; visual development; neurosensory development; smooth pursuit eye movements; perinatal risk factors; reaching movements; Paediatric medicine; Pediatrisk medicin; Pediatrik; Pediatrics;

   Sammanfattning : To coordinate visual perception and motor control in daily life where we are constantly surrounded by motion, we are dependent on normal visuomotor capacity. One essential prerequisite for normal visuomotor capacity is smooth pursuit eye movements (SP). Infants born very preterm (VPT = born .. LÄS MER

3. 2. Mathematical modeling of the human smooth pursuit system

   Författare :Daniel Jansson; Alexander Medvedev; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

   Sammanfattning : This licentiate thesis concerns mathematical modeling and identification of the the human smooth pursuit system (SPS) and the application of the models to motor symptom quantification in Parkinson's disease (PD).The SPS is a complex neuromuscular system governing smooth pursuit eye movements (SPEM), and the task is to keep a moving target in the visual field. LÄS MER

4. 3. Characterisation of nystagmus waveforms in eye-tracker signals

   Författare :William Rosengren; Avdelningen för Biomedicinsk teknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Eye tracking; Signal processing; Nystagmus;

   Sammanfattning : This thesis deals with the analysis of eye–tracker signals recorded from nystagmus patients. Nystagmus is an eye movement disorder caused by an underlying condition, and patients who suffer from nystagmus express involuntary oscillating eye move- ments. LÄS MER

5. 4. When, Where and What : The Development of Perceived Spatio-Temporal Continuity

   Författare :Olga Kochukhova; Claes Von Hofsten; Richard Aslin; Uppsala universitet; []
   Nyckelord :Psychology; infants; occlusion; incomplete visual information; saccadic gaze shifts; smooth pursuit; temporal; spatial; object representation; learning; extrapolation; Psykologi;

   Sammanfattning : This thesis explored the development of infants’ ability to preserve spatio-temporal continuity of moving objects in situations where they disappeared completely (Study I & II) or partially (Study III) behind other objects (occluders). We recorded infants gaze direction with the help of two different techniques: 1) infants’ gaze shifts in Study I were measured with electro-oculogram (EOG) in combination with a motion analyzing system (Qualisys) that recorded the reflected infrared light from markers placed on the infant’s head and the moving object; 2) in Studies II and III a cornea reflection eye tracker was used (Tobii 1750) . LÄS MER

7. 5. Identification Techniques for Mathematical Modeling of the Human Smooth Pursuit System

   Författare :Daniel Jansson; Alexander Medvedev; Peter Stoica; Johan Schoukens; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear system identification; biomedical signal processing; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

   Sammanfattning : This thesis proposes nonlinear system identification techniques for the mathematical modeling of the human smooth pursuit system (SPS) with application to motor symptom quantification in Parkinson's disease (PD). The SPS refers to the complex neuromuscular system in humans that governs the smooth pursuit eye movements (SPEM). LÄS MER