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Sagittal plane kinematics of the foot during passive ankle dorsiflexion

Gatt, A. and Chockalingam, N. and Chevalier, T.L. (2011) Sagittal plane kinematics of the foot during passive ankle dorsiflexion. Prosthetics and Orthotics International, 35 (4). pp. 425-431.

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Abstract or description

Background: Measurement of ankle joint dorsiflexion is an essential examination technique that needs to be performed prior to prescription of foot orthoses since the presence or absence of ankle equinus will affect the design of such devices. The purpose of this study was to investigate the effect of foot posture on sagittal plane kinematics of various foot segments during passive dorsiflexion. Study Design: Comparative repeated measures design. Objectives: To determine the effect of foot posture on inter segmental kinematics during passive dorsiflexion. Methods: An optoelectronic movement analysis system was employed to collect kinematic data. A validated marker set (Oxford Foot Model) was applied to 16 subjects (12 males, 4 females) with a mean age of 35.5 years (range 20-56 years), who provided informed consent. An upward force was applied to the forefoot until maximum resistance. Sagittal movement of the hindfoot and forefoot segments along with the whole foot movement were analyzed in the pronated, neutral and supinated foot postures. Results: While maximum foot dorsiflexion angle showed a significant difference between the three postures (p=0.000) the actual recorded difference between the neutral and supinated postures was only 2.49°. For the hindfoot and forefoot segments, mean angle range of movement for the pronated foot posture was significantly higher than the other foot postures. The forefoot to hindfoot angle demonstrated a significant (p=0.005) increase during dorsiflexion between the pronated and supinated postures. These results indicate that during passive dorsiflexion, the forefoot travels through a greater degree of movement than the hindfoot. Conclusions: While the maximum foot dorsiflexion angle differs significantly between the pronated and supinated foot postures, hindfoot movement also varies significantly between foot postures. Furthermore, the forefoot to tibia angle travels through a greater range than the hindfoot to tibia angle, in all three foot postures. The hindfoot to forefoot angle does not remain constant during passive dorsiflexion, but increases upon application of a dorsiflexing force, indicating that the forefoot movement cannot be eliminated completely by placing the foot in any particular posture. © The International Society for Prosthetics and Orthotics 2011.

Item Type: Article
Additional Information: cited By (since 1996) 1
Uncontrolled Keywords: adult; ankle; article; body posture; dorsiflexion; female; foot orthosis; foot posture; forefoot; human; human experiment; informed consent; kinematics; leg movement; male; normal human; position; scoring system, Adult; Ankle Joint; Biomechanics; Foot; Humans; Locomotion; Male; Middle Aged; Posture; Range of Motion, Articular; Reproducibility of Results
Subjects: A900 Others in Medicine and Dentistry
B800 Medical Technology
B900 Others in Subjects allied to Medicine
C600 Sports Science
Faculty: Faculty of Health Sciences > Psychology, Sport and Exercise
Depositing User: Nachiappan CHOCKALINGAM
Date Deposited: 14 Mar 2013 22:25
Last Modified: 14 Mar 2013 22:25
URI: http://eprints.staffs.ac.uk/id/eprint/697

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