Development of a 3D workspace shoulder assessment tool incorporating electromyography and an inertial measurement unit—a preliminary study

Authors: Aslani, N., Noroozi, S., Davenport, P., Hartley, R., Dupac, M. and Sewell, P.

http://eprints.bournemouth.ac.uk/29965/

Journal: Medical & Biological Engineering & Computing

eISSN: 1741-0444

ISSN: 0140-0118

DOI: 10.1007/s11517-017-1745-4

This data was imported from PubMed:

Authors: Aslani, N., Noroozi, S., Davenport, P., Hartley, R., Dupac, M. and Sewell, P.

http://eprints.bournemouth.ac.uk/29965/

Journal: Med Biol Eng Comput

Volume: 56

Issue: 6

Pages: 1003-1011

eISSN: 1741-0444

DOI: 10.1007/s11517-017-1745-4

Traditional shoulder range of movement (ROM) measurement tools suffer from inaccuracy or from long experimental setup times. Recently, it has been demonstrated that relatively low-cost wearable inertial measurement unit (IMU) sensors can overcome many of the limitations of traditional motion tracking systems. The aim of this study is to develop and evaluate a single IMU combined with an electromyography (EMG) sensor to monitor the 3D reachable workspace with simultaneous measurement of deltoid muscle activity across the shoulder ROM. Six volunteer subjects with healthy shoulders and one participant with a 'frozen' shoulder were recruited to the study. Arm movement in 3D space was plotted in spherical coordinates while the relative EMG intensity of any arm position is presented graphically. The results showed that there was an average ROM surface area of 27291 ± 538 deg2 among all six healthy individuals and a ROM surface area of 13571 ± 308 deg2 for the subject with frozen shoulder. All three sections of the deltoid show greater EMG activity at higher elevation angles. Using such tools enables individuals, surgeons and physiotherapists to measure the maximum envelope of motion in conjunction with muscle activity in order to provide an objective assessment of shoulder performance in the voluntary 3D workspace. Graphical abstract The aim of this study is to develop and evaluate a single IMU combined with an electromyography (EMG) sensor to monitor the 3D reachable workspace with simultaneous measurement of deltoid muscle activity across the shoulder ROM. The assessment tool consists of an IMU sensor, an EMG sensor, a microcontroller and a Bluetooth module. The assessment tool was attached to subjects arm. Individuals were instructed to move their arms with the elbow fully extended. They were then asked to provide the maximal voluntary elevation envelope of the arm in 3D space in multiple attempts starting from a small movement envelope going to the biggest possible in four consecutive circuits. The results showed that there was an average ROM surface area of 27291 ± 538 deg2 among all six healthy individuals and a ROM surface area of 13571 ± 308 deg2 for the subject with frozen shoulder. All three sections of the deltoid show greater EMG activity at higher elevation angles. Using such tools enables individuals, surgeons and physiotherapists to measure the maximum envelope of motion in conjunction with muscle activity in order to provide an objective assessment of shoulder performance in the voluntary 3D workspace.

This data was imported from Scopus:

Authors: Aslani, N., Noroozi, S., Davenport, P., Hartley, R., Dupac, M. and Sewell, P.

http://eprints.bournemouth.ac.uk/29965/

Journal: Medical and Biological Engineering and Computing

Volume: 56

Issue: 6

Pages: 1003-1011

eISSN: 1741-0444

ISSN: 0140-0118

DOI: 10.1007/s11517-017-1745-4

© 2017, The Author(s). Traditional shoulder range of movement (ROM) measurement tools suffer from inaccuracy or from long experimental setup times. Recently, it has been demonstrated that relatively low-cost wearable inertial measurement unit (IMU) sensors can overcome many of the limitations of traditional motion tracking systems. The aim of this study is to develop and evaluate a single IMU combined with an electromyography (EMG) sensor to monitor the 3D reachable workspace with simultaneous measurement of deltoid muscle activity across the shoulder ROM. Six volunteer subjects with healthy shoulders and one participant with a ‘frozen’ shoulder were recruited to the study. Arm movement in 3D space was plotted in spherical coordinates while the relative EMG intensity of any arm position is presented graphically. The results showed that there was an average ROM surface area of 27291 ± 538 deg 2 among all six healthy individuals and a ROM surface area of 13571 ± 308 deg 2 for the subject with frozen shoulder. All three sections of the deltoid show greater EMG activity at higher elevation angles. Using such tools enables individuals, surgeons and physiotherapists to measure the maximum envelope of motion in conjunction with muscle activity in order to provide an objective assessment of shoulder performance in the voluntary 3D workspace. [Figure not available: see fulltext.].

This data was imported from Web of Science (Lite):

Authors: Aslani, N., Noroozi, S., Davenport, P., Hartley, R., Dupac, M. and Sewell, P.

http://eprints.bournemouth.ac.uk/29965/

Journal: MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING

Volume: 56

Issue: 6

Pages: 1003-1011

eISSN: 1741-0444

ISSN: 0140-0118

DOI: 10.1007/s11517-017-1745-4

The data on this page was last updated at 05:18 on July 20, 2019.