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Agency over a phantom limb and electromyographic activity on the stump depend on visuomotor synchrony : a case study

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Agency over a phantom limb and electromyographic activity on the stump depend on visuomotor synchrony : a case study
นักวิจัย : Imaizumi, Shu , Asai, Tomohisa , Kanayama, Noriaki , Kawamura, Mitsuru , Koyama, Shinichi
คำค้น : DRNTU::Science::Biological sciences::Human anatomy and physiology::Neurobiology
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Imaizumi, S., Asai, T., Kanayama, N., Kawamura, M., & Koyama, S. (2014). Agency over a phantom limb and electromyographic activity on the stump depend on visuomotor synchrony: a case study. Frontiers in Human Neuroscience, 8, 545-. , 1662-5161 , http://hdl.handle.net/10220/20387 , http://dx.doi.org/10.3389/fnhum.2014.00545
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Frontiers in human neuroscience
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Most patients, post-amputation, report the experience of a phantom limb. Some even sense voluntary movements when viewing a mirror image of the intact limb superimposed onto the phantom limb. While delayed visual feedback of an action is known to reduce a sense of agency, the effect of delayed visual feedback on phantom motor sensation (i.e., sense of controlling a phantom limb) has not been examined. Using a video-projection system, we examined the effect of delayed visual feedback on phantom motor sensation in an upper-limb amputee (male; left upper-limb amputation). He was instructed to view mirrored video images of his intact hand clasping and unclasping during a phantom limb movement. He then rated the intensity of the phantom motor sensation. Three types of hand movement images were presented as follows: synchronous, asynchronous with a 250-ms delay, and asynchronous with a 500-ms delay. Results showed that phantom motor sensation decreased when the image was delayed by 250 and 500 ms. However, when we instructed the patient to adjust the phase of phantom limb movement to that of the image with a 500-ms delay, phantom motor sensation increased. There was also a positive correlation between intensity of phantom motor sensation and electromyographic (EMG) activity on deltoids at the patient’s stump. These results suggest that phantom motor sensation and EMG activity on the stump depend on visuomotor synchrony and top-down effects.

บรรณานุกรม :
Imaizumi, Shu , Asai, Tomohisa , Kanayama, Noriaki , Kawamura, Mitsuru , Koyama, Shinichi . (2557). Agency over a phantom limb and electromyographic activity on the stump depend on visuomotor synchrony : a case study.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Imaizumi, Shu , Asai, Tomohisa , Kanayama, Noriaki , Kawamura, Mitsuru , Koyama, Shinichi . 2557. "Agency over a phantom limb and electromyographic activity on the stump depend on visuomotor synchrony : a case study".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Imaizumi, Shu , Asai, Tomohisa , Kanayama, Noriaki , Kawamura, Mitsuru , Koyama, Shinichi . "Agency over a phantom limb and electromyographic activity on the stump depend on visuomotor synchrony : a case study."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Imaizumi, Shu , Asai, Tomohisa , Kanayama, Noriaki , Kawamura, Mitsuru , Koyama, Shinichi . Agency over a phantom limb and electromyographic activity on the stump depend on visuomotor synchrony : a case study. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.