Lower-Limb Myoelectric Calibration Postures for Transtibial Prostheses
The use of an agonist-antagonist muscle pair for myoelectric control of a transtibial prosthesis requires normalizing the myoelectric signals and identifying their co-contraction signature. Extensive literature has explored the relationship between body posture and lower-limb muscle activation level...
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Transactions on Neural Systems and Rehabilitation Engineering |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10463088/ |
| _version_ | 1827308211028361216 |
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| author | Ryan R. Posh Emmalynn C. Barry James P. Schmiedeler Patrick M. Wensing |
| author_facet | Ryan R. Posh Emmalynn C. Barry James P. Schmiedeler Patrick M. Wensing |
| author_sort | Ryan R. Posh |
| collection | DOAJ |
| description | The use of an agonist-antagonist muscle pair for myoelectric control of a transtibial prosthesis requires normalizing the myoelectric signals and identifying their co-contraction signature. Extensive literature has explored the relationship between body posture and lower-limb muscle activation level using surface electromyography (EMG), but it is unknown how these relationships hold after amputation. Using a virtual tracking task, this study compares the effect of three different calibration postures (seated, standing, dynamic) on user tracking ability while in two tracking postures (seated, standing) for 18 able-bodied (AB) subjects and 9 subjects with transtibial (TT) amputation. As expected, AB subjects produced statistically significant differences in muscle activation for gastrocnemius (GAS) when seated vs. standing during calibration (p = 8.8e-4), but not for tibialis anterior (TA) (p = 0.76). TT subjects, however, showed no significant differences in GAS or TA between seated and standing (p = 0.90, 0.60 respectively). It was also determined that normalizing EMG by the global maximum signal observed (standard in biomechanic analysis) is undesirable for myoelectric control. For best general results with this framework, calibration in both seated and dynamic postures is recommended, taking the normalization information from the seated posture and the narrowest co-contraction slopes from the two. |
| first_indexed | 2024-04-24T18:54:33Z |
| format | Article |
| id | doaj.art-e718009e3ef146e487d0bb02235cc1e2 |
| institution | Directory Open Access Journal |
| issn | 1558-0210 |
| language | English |
| last_indexed | 2024-04-24T18:54:33Z |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Transactions on Neural Systems and Rehabilitation Engineering |
| spelling | doaj.art-e718009e3ef146e487d0bb02235cc1e22024-03-26T17:47:11ZengIEEEIEEE Transactions on Neural Systems and Rehabilitation Engineering1558-02102024-01-01321210122010.1109/TNSRE.2024.337511810463088Lower-Limb Myoelectric Calibration Postures for Transtibial ProsthesesRyan R. Posh0https://orcid.org/0000-0003-4613-5210Emmalynn C. Barry1James P. Schmiedeler2https://orcid.org/0000-0002-1692-4414Patrick M. Wensing3https://orcid.org/0000-0002-9041-5175Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, USADepartment of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, USADepartment of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, USADepartment of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, USAThe use of an agonist-antagonist muscle pair for myoelectric control of a transtibial prosthesis requires normalizing the myoelectric signals and identifying their co-contraction signature. Extensive literature has explored the relationship between body posture and lower-limb muscle activation level using surface electromyography (EMG), but it is unknown how these relationships hold after amputation. Using a virtual tracking task, this study compares the effect of three different calibration postures (seated, standing, dynamic) on user tracking ability while in two tracking postures (seated, standing) for 18 able-bodied (AB) subjects and 9 subjects with transtibial (TT) amputation. As expected, AB subjects produced statistically significant differences in muscle activation for gastrocnemius (GAS) when seated vs. standing during calibration (p = 8.8e-4), but not for tibialis anterior (TA) (p = 0.76). TT subjects, however, showed no significant differences in GAS or TA between seated and standing (p = 0.90, 0.60 respectively). It was also determined that normalizing EMG by the global maximum signal observed (standard in biomechanic analysis) is undesirable for myoelectric control. For best general results with this framework, calibration in both seated and dynamic postures is recommended, taking the normalization information from the seated posture and the narrowest co-contraction slopes from the two.https://ieeexplore.ieee.org/document/10463088/Transtibial prosthesismyoelectric controlvolitional control |
| spellingShingle | Ryan R. Posh Emmalynn C. Barry James P. Schmiedeler Patrick M. Wensing Lower-Limb Myoelectric Calibration Postures for Transtibial Prostheses IEEE Transactions on Neural Systems and Rehabilitation Engineering Transtibial prosthesis myoelectric control volitional control |
| title | Lower-Limb Myoelectric Calibration Postures for Transtibial Prostheses |
| title_full | Lower-Limb Myoelectric Calibration Postures for Transtibial Prostheses |
| title_fullStr | Lower-Limb Myoelectric Calibration Postures for Transtibial Prostheses |
| title_full_unstemmed | Lower-Limb Myoelectric Calibration Postures for Transtibial Prostheses |
| title_short | Lower-Limb Myoelectric Calibration Postures for Transtibial Prostheses |
| title_sort | lower limb myoelectric calibration postures for transtibial prostheses |
| topic | Transtibial prosthesis myoelectric control volitional control |
| url | https://ieeexplore.ieee.org/document/10463088/ |
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