A comparison of functional and regression-based hip joint centers in persons with achondroplasia

Broström, Eva; Gutierrez-Farewik, Elena M.; Örtqvist, Maria; Hagenäs, Lars; Neumeyer, Luitgard; Rozumalski, Adam; Schwartz, Michael H.

doi:10.1016/j.gaitpost.2009.08.121

Cited by 1 publication

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“…In fact, the externally rotated position of the hips of the group with Achondroplasia may be greater than that reported in the current study due to the above arguments regarding beta-angle of the femur in individuals with Achondroplasia compared to controls. We are confident however, that regardless of the model used, or suggested for gait analyses in individuals with Achondroplasia [18,19], only knee flexion/ extension and hip rotation GVSs would be affected in this group were the thigh marker placement incorrect. It is probable therefore, that the GPS of any individual with Achondroplasia (e.g.…”

Section: Discussionmentioning

confidence: 86%

“…In the current group with Achondroplasia, the HJC appears to be more posterior than the identification of the greater trochanter which is contrary to previous work that has estimated the HJC of individuals with Achondroplasia. Broström et al [18] showed that a functional method [19] of identifying HJC in individuals with Achondroplasia was 15.6 mm more posterior than the Plug-in-Gait model [16], but could range from 1.7 to 31.3 mm more posterior than Plug-in-Gait's prediction. Broström et al suggested that a functional prediction of HJC in individuals with Achondroplasia should be incorporated into future gait research of individuals with Achondroplasia.…”

Section: Discussionmentioning

confidence: 99%

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A quantitative description of self-selected walking in adults with Achondroplasia using the gait profile score

et al. 2019

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Background: Achondroplasia is characterised by a shorter appendicular limb-to-torso ratio, compared to age matched individuals of average stature (controls). Previous work shows gait kinematics of individuals with Achondroplasia differing to controls, but no global quantification of gait has been made in adults with Achondroplasia. Aim: The aim of this study was to quantify gait differences between a group of adult males with Achondroplasia and controls during self-selected walking (SSW) using the Gait Profile Score (GPS). Design: Whole body motion analysis of 10 adults with Achondroplasia (22 ± 3 yrs) who had not undergone leg lengthening and 17 adult controls (22 ± 2 yrs) was undertaken using a 14 camera VICON system (100 Hz). For each group, fifteen root mean squared Gait Variable Scores (GVS, units°) were computed from lower limb kinematic data and then summed to calculate GPS (°). Results: The group with Achondroplasia had higher GVSs than controls in 10 of the 15 measures (P < 0.05) with the largest differences found in ankle plantar/dorsiflexion (P < 0.001), knee flexion/extension (P < 0.001), and hip internal/external rotation (P < 0.001). The GPS value of the group with Achondroplasia was 64% higher than controls (11.4°(2.0) v 4.1°(1.8), P < 0.001). Conclusion: Gait is quantitatively different in adults with Achondroplasia compared to controls. The differences in GPS between groups are due to differences in joint kinematics, which are possibly manifested by maintaining toe-clearance during swing. Gait models derived from the anatomy of individuals with Achondroplasia may improve these data.

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Section: Discussionmentioning

confidence: 86%