Stride-to-stride variability is altered during backward walking in anterior cruciate ligament deficient patients
Φόρτωση...
Ημερομηνία
Συγγραφείς
Zampeli, F.
Moraiti, C. O.
Xergia, S.
Tsiaras, V. A.
Stergiou, N.
Georgoulis, A. D.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer-reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Clin Biomech (Bristol, Avon)
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
BACKGROUND: Recently backward walking is used by physical therapists to strengthen the hamstring muscles and thus improve the function of the knee joint of anterior cruciate ligament deficient patients. The aim of this study was to examine the stride-to-stride variability of anterior cruciate ligament deficient patients during backward walking. The variation of how a motor behavior emerges in time is best captured by tools derived from nonlinear dynamics, for which the temporal sequence in a series of values is the facet of interest. METHODS: Fifteen patients with unilateral anterior cruciate ligament deficiency and eleven healthy controls walked backwards at their self-selected speed on a treadmill while three-dimensional knee kinematics were collected (100 Hz). A nonlinear measure, the largest Lyapunov Exponent was calculated from the resulted knee joint flexion-extension data of both groups to assess the stride-to-stride variability. FINDINGS: Both knees of the deficient patients exhibited significantly lower Lyapunov Exponent values as compared to the healthy control group revealing more rigid movement pattern. The intact knee of the deficient patients showed significantly lower Lyapunov Exponent values as compared to the deficient knee. INTERPRETATION: Anterior cruciate ligament (ACL) deficiency leads to loss of optimal variability regardless of the walking direction (forwards in previous studies or backwards here) as compared to healthy individuals. This could imply diminished functional responsiveness to the environmental demands for both knees of ACL deficient patients which could result in the knees being more susceptible to injury.
Περιγραφή
Λέξεις-κλειδιά
Adult, Algorithms, Anterior Cruciate Ligament/*injuries/physiopathology, Biomechanics, Case-Control Studies, Gait/*physiology, Humans, Knee, Knee Joint/physiopathology, Male, Physical Therapy Modalities, Time Factors, *Walking
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
http://www.ncbi.nlm.nih.gov/pubmed/20813442
http://ac.els-cdn.com/S0268003310002184/1-s2.0-S0268003310002184-main.pdf?_tid=b8843e8c3e228991b66d10f72fa713ae&acdnat=1333378841_b2ce42882cc2a29fe1f663568156b7cd
http://ac.els-cdn.com/S0268003310002184/1-s2.0-S0268003310002184-main.pdf?_tid=b8843e8c3e228991b66d10f72fa713ae&acdnat=1333378841_b2ce42882cc2a29fe1f663568156b7cd
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικής