Neurology,
Research Article,
Psychology,
Psychophysics,
Biology,
Neuroscience,
Computational neuroscience,
Sensory systems,
Sensory perception,
Visual system,
Medicine,
Anatomy and physiology,
Neurological system,
Sensory physiology,
Mental health,
Neuro-ophthalmology,
Ophthalmology,
Surgery
BackgroundThe image formed by the eye's optics is blurred by the ocular aberrations, specific to each eye. Recent studies demonstrated that the eye is adapted to the level of blur produced by the high order aberrations (HOA). We examined whether visual coding is also adapted to the orientation of the natural HOA of the eye.Methods and FindingsJudgments of perceived blur were measured in 5 subjects in a psychophysical procedure inspired by the “Classification Images” technique. Subjects…
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Neurology,
Research Article,
Biology,
Neuroscience,
Medicine,
Anatomy and physiology,
Neurological system,
Motor systems,
Engineering,
Bioengineering,
Biomedical engineering,
Musculoskeletal system,
Muscle,
Muscle functions,
Cardiovascular,
Stroke,
Diagnostic medicine,
Clinical neurophysiology,
Electromyography,
Cerebrovascular diseases,
Physiotherapy and rehabilitation
Significant functional impairment of the hand is commonly observed in stroke survivors. Our previous studies suggested that the inability to modulate muscle coordination patterns according to task requirements may be substantial after stroke, but these limitations have not been examined directly. In this study, we aimed to characterize post-stroke impairment in the ability to modulate muscle coordination patterns across tasks and its correlation with hand impairment. Fourteen stroke…
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Research Article,
Social and behavioral sciences,
Psychology,
Biology,
Neuroscience,
Computational neuroscience,
Medicine,
Mental health,
Cognitive neuroscience,
Mathematics,
Applied mathematics,
Mental Health
Several studies have shown that human motor behavior can be successfully described using optimal control theory, which describes behavior by optimizing the trade-off between the subject's effort and performance. This approach predicts that subjects reach the goal exactly at the final time. However, another strategy might be that subjects try to reach the target position well before the final time to avoid the risk of missing the target. To test this, we have investigated whether…
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Research Article,
Biology,
Neuroscience,
Computational neuroscience,
Medicine,
Anatomy and physiology,
Neurological system,
Motor systems,
Engineering,
Bioengineering,
Diagnostic medicine,
Clinical neurophysiology,
Cognitive neuroscience,
Physiology,
Neurophysiology,
Behavioral neuroscience,
Learning and memory,
Neuropsychology,
Bionics,
Electroencephalography,
Biotechnology
Brain-computer interfaces (BCIs) allow a user to interact with a computer system using thought. However, only recently have devices capable of providing sophisticated multi-dimensional control been achieved non-invasively. A major goal for non-invasive BCI systems has been to provide continuous, intuitive, and accurate control, while retaining a high level of user autonomy. By employing electroencephalography (EEG) to record and decode sensorimotor rhythms (SMRs) induced from motor…
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