| Presentation | 2002/3/13 Reflexive Muscle Activity and its Effect on Arm Stiffness Naoki SAIJYO, Hiroaki GOMI, Patrick HAGGARD, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It would be important to reveal how the central nervous system (CNS) regulates the mechanical impedance of musculoskeletal dynamics in interacting with physical environment. To examine this issue, we measured human multijoint arm stiffness by applying small perturbation just before the arm encountered an altered dynamics (valley, ridge, null force field) during two kind of longitudinal movements (proximal to distal, and distal to proximal positions). As a result, it was found the orientation of stiffness was greatly altered according to movement directions, and stiffness increased in the unstable direction of the external dynamics. Then we examined the effect of the reflex electromyogram (EMG) response against the perturbations on the joint torque change. The condition dependent variation of the joint stiffness due to the reflex was similar to that of the total joint stiffness. Additionally, reflex force represented in hand coordination was functionally altered according to the physical environments. These results suggest that stiffness modulation is greatly attributed to the reflex response which could be regulated by the CNS. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Arm stiffmess / Interaction / Arm movement control / Reflex / Muscle coordination / Electromyogram |
| Paper # | NC2001-215 |
| Date of Issue |
| Conference Information | |
| Committee | NC |
|---|---|
| Conference Date | 2002/3/13(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Neurocomputing (NC) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Reflexive Muscle Activity and its Effect on Arm Stiffness |
| Sub Title (in English) | |
| Keyword(1) | Arm stiffmess |
| Keyword(2) | Interaction |
| Keyword(3) | Arm movement control |
| Keyword(4) | Reflex |
| Keyword(5) | Muscle coordination |
| Keyword(6) | Electromyogram |
| 1st Author's Name | Naoki SAIJYO |
| 1st Author's Affiliation | NTT communication Science Labs.() |
| 2nd Author's Name | Hiroaki GOMI |
| 2nd Author's Affiliation | NTT communication Science Labs.:CREST of Japan Science and Technology Co.:Interdisciplinary Grad. School of Sci. & Eng., Univ. Tokyo Institute of Technology |
| 3rd Author's Name | Patrick HAGGARD |
| 3rd Author's Affiliation | Univ. College London |
| Date | 2002/3/13 |
| Paper # | NC2001-215 |
| Volume (vol) | vol.101 |
| Number (no) | 737 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |