Comparison of ankle angle adaptations of prosthetic feet with and without adaptive ankle angle during level ground, ramp, and stair ambulations of a transtibial amputee: A pilot study

2014 ◽  
Vol 15 (12) ◽  
pp. 2689-2693 ◽  
Author(s):  
Chang-Yong Ko ◽  
Sol-Bi Kim ◽  
Jong Kwon Kim ◽  
Yunhee Chang ◽  
Shinki Kim ◽  
...  
Keyword(s):  
Pilot Study ◽  
Transtibial Amputee ◽  
Ankle Angle ◽  
Prosthetic Feet

scholarly journals Gastrocnemius Medialis Architectural Properties in Flexibility Trained and Not Trained Child Female Athletes: A Pilot Study

Sports ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 29 ◽  
Author(s):  
Ioli Panidi ◽  
Gregory C. Bogdanis ◽  
Vasiliki Gaspari ◽  
Polyxeni Spiliopoulou ◽  
Anastasia Donti ◽  
...  
Keyword(s):  
Pilot Study ◽  
Distal Part ◽  
Joint Angle ◽  
Female Athletes ◽  
Muscle Thickness ◽  
Pennation Angle ◽  
Static Stretching ◽  
Fascicle Length ◽  
Gastrocnemius Medialis ◽  
Ankle Angle

Gastrocnemius medialis (GM) architecture and ankle angle were compared between flexibility trained (n = 10) and not trained (n = 6) female athletes, aged 8–10 years. Ankle angle, fascicle length, pennation angle and muscle thickness were measured at the mid-belly and the distal part of GM, at rest and at the end of one min of static stretching. Flexibility trained (FT) and not trained athletes (FNT) had similar fascicle length at the medial (4.19 ± 0.37 vs. 4.24 ± 0.54 cm, respectively, p = 0.841) and the distal part of GM (4.25 ± 0.35 vs. 4.18 ± 0.65 cm, respectively, p = 0.780), similar pennation angles, and muscle thickness (p > 0.216), and larger ankle angle at rest (120.9 ± 4.2 vs. 110.9 ± 5.8°, respectively, p = 0.001). During stretching, FT displayed greater fascicle elongation compared to FNT at the medial (+1.67 ± 0.37 vs. +1.28 ± 0.22 cm, respectively, p = 0.048) and the distal part (+1.84 ± 0.67 vs. +0.97 ± 0.97 cm, respectively, p = 0.013), larger change in joint angle and muscle tendon junction displacement (MTJ) (p < 0.001). Muscle thickness was similar in both groups (p > 0.053). Ankle dorsiflexion angle significantly correlated with fascicle elongation at the distal part of GM (r = −0.638, p < 0.01) and MTJ displacement (r = −0.610, p < 0.05). Collectively, FT had greater fascicle elongation at the medial and distal part of GM and greater MTJ displacement during stretching than FNT of similar age.

scholarly journals Changes in synergy of transtibial amputee during gait: A pilot study

2017 ◽  
Author(s):  
P. Mehryar ◽  
M. S. Shourijeh ◽  
T. Rezaeian ◽  
N. Iqbal ◽  
N. Messenger ◽  
...  
Keyword(s):  
Pilot Study ◽  
Transtibial Amputee

Finite Element Analysis of Piezoelectric Strips for Modifying Ankle Torques in Active Prosthetic Feet: A Pilot Study

2012 ◽  
Author(s):  
Thomas Powelson ◽  
Jingzhou (James) Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Pilot Study ◽  
Gait Cycle ◽  
Electric Motors ◽  
Element Analysis ◽  
Prosthetic Foot ◽  
Ankle Torque ◽  
Novel Method ◽  
Prosthetic Feet

Over the last fifty years there has been a steady advance in prosthetic foot technologies. These advances have primarily focused on more accurately mimicking the biologic foot for amputees. One field of research currently being explored is active/powered prosthetic feet in which the movement of the foot is actively controlled through the use of electric motors. Some of these feet also seek to reproduce the ankle torques seen in the biologic foot. This paper proposes a novel method for more accurately reproducing these ankle torques through the use of piezoelectrics in conjunction with the electric motors. FEA software is used to simulate the modification of ankle torques through the use of piezoelectric bending actuators in a general case. A number of different configurations for the piezoelectric strips are examined to test the versatility of the piezoelectrics in this application. The general trends of the ankle torque vs gait cycle found in the literature have been reproduced in the simulations.

Pilot study on criteria in cavity preparation-facts or artifacts?

1973 ◽  
Vol 37 (11) ◽  
pp. 27-31 ◽  
Author(s):  
G Salvendy ◽  
WM Hinton ◽  
GW Ferguson ◽  
PR Cunningham
Keyword(s):  
Pilot Study ◽  
Cavity Preparation
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