Abstract: Working memory can preserve multiple items at one time with a limited capacity is a key issue in working memory research. While visual and verbal domains of working memory are able to store multiple items, we know little about vibrotactile working memory capacity of frequency. Vibrotactile stimulus and visual stimulus have different neural coding mechanisms, and vibrotactile frequency is analogy, one- dimensional and parametric information generated by somatic sensation. Therefore, it is necessary to study the capacity of vibrotactile working memory, and reveal its cognitive and neural mechanism. First of all, different modes of vibratory stimulus presentation and response were used to determine the size of the vibrotactile working memory capacity and its cognitive mechanism. Then using functional magnetic resonance imaging (fMRI), we will investigate the neural mechanism of maintenance of vibrotactile working memory. The study of vibrotactile parametric working memory is an important part of working memory model, which will contribute to our understanding of working memory system and lay a foundation for cross-modalities research of visual, auditory and tactile information.

Key words: vibrotactile working memory, working memory capacity, vibratory frequency, sensory modalities, parametric working memory