Measurement Method of Human Lower Limb Joint Range of Motion Through Human-Machine Interaction Based on Machine Vision

To provide stroke patients with good rehabilitation training, the rehabilitation robot should ensure that each joint of the limb of the patient does not exceed its joint range of motion. Based on the machine vision combined with an RGB-Depth (RGB-D) camera, a convenient and quick human-machine interaction method to measure the lower limb joint range of motion of the stroke patient is proposed. By analyzing the principle of the RGB-D camera, the transformation relationship between the camera coordinate system and the pixel coordinate system in the image is established. Through the markers on the human body and chair on the rehabilitation robot, an RGB-D camera is used to obtain their image data with relative position. The threshold segmentation method is used to process the image. Through the analysis of the image data with the least square method and the vector product method, the range of motion of the hip joint, knee joint in the sagittal plane, and hip joint in the coronal plane could be obtained. Finally, to verify the effectiveness of the proposed method for measuring the lower limb joint range of motion of human, the mechanical leg joint range of motion from a lower limb rehabilitation robot, which will be measured by the angular transducers and the RGB-D camera, was used as the control group and experiment group for comparison. The angle difference in the sagittal plane measured by the proposed detection method and angle sensor is relatively conservative, and the maximum measurement error is not more than 2.2 degrees. The angle difference in the coronal plane between the angle at the peak obtained by the designed detection system and the angle sensor is not more than 2.65 degrees. This paper provides an important and valuable reference for the future rehabilitation robot to set each joint range of motion limited in the safe workspace of the patient.

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First metatarsophalangeal joint range of motion is associated with lower limb kinematics in individuals with first metatarsophalangeal joint osteoarthritis

Journal of Foot and Ankle Research ◽

10.1186/s13047-020-00404-0 ◽

2020 ◽

Vol 13 (1) ◽

Cited By ~ 1

Author(s):

Jamie J. Allan ◽

Jodie A. McClelland ◽

Shannon E. Munteanu ◽

Andrew K. Buldt ◽

Karl B. Landorf ◽

...

Keyword(s):

Range Of Motion ◽

Lower Limb ◽

Metatarsophalangeal Joint ◽

First Metatarsophalangeal Joint ◽

Joint Range Of Motion ◽

Limb Kinematics ◽

Joint Range ◽

Lower Limb Kinematics

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First metatarsophalangeal joint range of motion is associated with lower limb kinematics in individuals with first metatarsophalangeal joint osteoarthritis

10.21203/rs.3.rs-21140/v1 ◽

2020 ◽

Author(s):

Jamie J Allan ◽

Jodie A McClelland ◽

Shannon E Munteanu ◽

Andrew K Buldt ◽

Karl B Landorf ◽

...

Keyword(s):

Range Of Motion ◽

Sagittal Plane ◽

Metatarsophalangeal Joint ◽

Hip Joints ◽

First Metatarsophalangeal Joint ◽

Clinical Measurement ◽

Joint Range Of Motion ◽

Level Walking ◽

Dynamic Function ◽

Joint Range

Abstract Background Osteoarthritis of the first metatarsophalangeal joint (1st MTP joint OA) is a common and disabling condition that results in pain and limited joint range of motion. There is inconsistent evidence regarding the relationship between clinical measurement of 1st MTP joint maximum dorsiflexion and dynamic function of the joint during level walking. Therefore, the aim of this study was to examine the association between passive non-weightbearing (NWB) 1st MTP joint maximum dorsiflexion and sagittal plane kinematics in individuals with radiographically confirmed 1st MTP joint OA. Methods Forty-eight individuals with radiographically confirmed 1st MTP joint OA (24 males and 24 females; mean age 57.8 years, standard deviation 10.5) underwent clinical measurement of passive NWB 1st MTP joint maximum dorsiflexion and gait analysis during level walking using a 10-camera infrared Vicon motion analysis system. Sagittal plane kinematics of the 1st MTP, ankle, knee, and hip joints were calculated. Associations between passive NWB 1st MTP joint maximum dorsiflexion and kinematic variables were explored using Pearson’s r correlation coefficients. Results Passive NWB 1st MTP joint maximum dorsiflexion was significantly associated with maximum 1st MTPJ dorsiflexion (r=0.486, p<0.001), ankle joint maximum plantarflexion (r=0.383, p=0.007), and ankle joint excursion (r=0.399, p=0.005) during gait. There were no significant associations between passive NWB 1st MTP joint maximum dorsiflexion and sagittal plane kinematics of the knee or hip joints. Conclusions Passive NWB 1st MTP joint maximum dorsiflexion is associated with sagittal plane kinematics of the 1st MTP and ankle joints during level walking in individuals with 1st MTP joint OA. These findings suggest that clinical measurement of 1st MTP joint maximum dorsiflexion provides useful insights into the dynamic function of the foot and ankle during the propulsive phase of gait in this population.

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First metatarsophalangeal joint range of motion is associated with lower limb kinematics in individuals with first metatarsophalangeal joint osteoarthritis

10.21203/rs.3.rs-21140/v2 ◽

2020 ◽

Author(s):

Jamie J Allan ◽

Jodie A McClelland ◽

Shannon E Munteanu ◽

Andrew K Buldt ◽

Karl B Landorf ◽

...

Keyword(s):

Range Of Motion ◽

Ankle Joint ◽

Sagittal Plane ◽

Metatarsophalangeal Joint ◽

Hip Joints ◽

First Metatarsophalangeal Joint ◽

Clinical Measurement ◽

Joint Range Of Motion ◽

Dynamic Function ◽

Joint Range

Abstract Background Osteoarthritis of the first metatarsophalangeal joint (1st MTP joint OA) is a common and disabling condition that results in pain and limited joint range of motion. There is inconsistent evidence regarding the relationship between clinical measurement of 1st MTP joint maximum dorsiflexion and dynamic function of the joint during level walking. Therefore, the aim of this study was to examine the association between passive non-weightbearing (NWB) 1st MTP joint maximum dorsiflexion and sagittal plane kinematics in individuals with radiographically confirmed 1st MTP joint OA. Methods Forty-eight individuals with radiographically confirmed 1st MTP joint OA (24 males and 24 females; mean age 57.8 years, standard deviation 10.5) underwent clinical measurement of passive NWB 1st MTP joint maximum dorsiflexion and gait analysis during level walking using a 10-camera infrared Vicon motion analysis system. Sagittal plane kinematics of the 1st MTP, ankle, knee, and hip joints were calculated. Associations between passive NWB 1st MTP joint maximum dorsiflexion and kinematic variables were explored using Pearson’s r correlation coefficients. Results Passive NWB 1st MTP joint maximum dorsiflexion was significantly associated with maximum 1st MTPJ dorsiflexion (r=0.486, p<0.001), ankle joint maximum plantarflexion (r=0.383, p=0.007), and ankle joint excursion (r=0.399, p=0.005) during gait. There were no significant associations between passive NWB 1st MTP joint maximum dorsiflexion and sagittal plane kinematics of the knee or hip joints. Conclusions These findings suggest that clinical measurement of 1st MTP joint maximum dorsiflexion provides useful insights into the dynamic function of the foot and ankle during the propulsive phase of gait in this population.

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Teaching Landing to Children with and Without Developmental Coordination Disorder

Pediatric Exercise Science ◽

10.1123/pes.10.2.123 ◽

1998 ◽

Vol 10 (2) ◽

pp. 123-136 ◽

Cited By ~ 7

Author(s):

Dawne Larkin ◽

Helen E. Parker

Keyword(s):

Range Of Motion ◽

Lower Limb ◽

Developmental Coordination Disorder ◽

Function Analysis ◽

Knee Angle ◽

Coordination Problems ◽

Joint Range Of Motion ◽

Joint Range ◽

Coordination Disorder ◽

Straight Ahead

This study investigated landing patterns of children aged 7–9 years with either developmental coordination disorder (DCD) or without coordination problems (NC). Initially, 16 DCD and 15 NC children were videotaped performing two-foot landings from a height of 21.5 cm onto a force platform sampling at 500 Hz. Each landing was videotaped at 60 Hz. Regression modeling of the data identified that 72% of peak maximum loading force was explained by landing time, knee angle at touchdown, and hip joint range of motion. Dis-criminant function analysis using landing force, landing time and lower limb joint kinematic variables reliably separated the groups. In the second part, 12 DCD and 10 NC children participated in 6 weekly landing lessons. The only significant adjustment produced by the program was a decrease in the range of motion at the hip in response to instructions to look straight ahead and sit into the landing.

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