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This study examined the fingertip force variability on the left and right hand during low-level sustained precision pinch with the thumb and index finger. Ten healthy, right-handed subjects were required to pinch a device with a stable force output at 5 N for 1 min. The pinch force was recorded for the right and left hand, separately. Visual feedback was provided for the first 30 s and removed for...
Writing and reading in a second language (L2) is a difficult processing that involves reciprocation between the native language (L1) and second language. In older to investigate the fundamental mechanisms, we used functional magnetic resonance imaging (fMRI) to visualize Japanese-Chinese bilinguals' brain activity in phonological processing of Chinese and Japanese words. We utilized fMRI to investigate...
In everyday life, our brains integrate various kinds of information from different modalities to perceive our complex environment. Temporal synchrony of audiovisual stimuli is required for audiovisual integration. Many studies have shown that temporal asynchrony of visual-auditory stimuli can influence the interaction between visual and auditory stimulus, however, the multisensory mechanisms of asynchrony...
Visual objects decoding with functional magnetic resonance imaging (fMRI) often merely depends on the brain activity, using pattern classification to decode information about visual stimuli from patterns of activity. However, the spatial resolution of fMRI is still limited to the > mm range. Limited by its spatial resolution, fMRI voxels lack high-spatial-frequency information of visual stimuli...
With shorter calibration times and higher information transfer rates, steady-state visual evoked potential (SSVEP)-based brain-computer interfaces (BCIs) have been studied most activity in recent years. Target identification is the ongoing core task in BCI researches, and plays a significant role in practical applications. In order to improve the performance of SSVEP-based BCI system, we proposed...
Percutaneous surgeries in the craniofacial region bring benefits to patients. Small cut downs relieve pain and reduce bleeding. Preoperative puncture trajectory planning is a critical procedure for percutaneous surgeries. Methods have been proposed to help surgeons make good decisions in trajectory planning both in automatic and interactive ways. Even though, optimizing a puncture pathway in craniofacial...
Effective user training could help us to improve the discrimination performance of our intention in brain computer interface (BCI). This paper aims to differentiate users left or right hand motor imagery (MI) tasks with different scenarios in 3D virtual environment, as non-object-directed (NOD) scenario, static-object-directed (SOD) scenario and dynamic-object-directed (DOD) scenario respectively...
In order to evaluate the heart function, it is valuable to detect and visualize the blood flow inside the left ventricle (LV) of the heart. In this paper, a method for flow detection in LV is proposed based on the echocardiography by using the speckle image velocimetry (SIV). It first segments the LV from the echocardiography and then conducts the SIV in the LV and estimates displacement vectors of...
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