Korkusuz, Süleyman

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Knee Hyperextension in Chronic Stroke: Associated Biomechanical and Neuromuscular Factors
(Elsevier Sci Ltd, 2025) Korkusuz, Sueleyman; Korkusuz, Busra Seckinogullari; Ozgoren, Nihat; Aritan, Serdar; Ceren, Ali Naim; Topcuoglu, Mehmet Akif; Balkan, Ayla Fil
Background: This study aimed to determine the gait phase in which knee hyperextension occurs in stroke patients and to investigate the factors associated with knee hyperextension. Methods: This study included 30 stroke patients aged between 40 and 70 years with maximum knee hyperextension during the stance phase of gait. Muscle strength was evaluated with manual muscle test, and muscle tone was assessed with the Modified Ashworth Scale. Kinematic evaluation of the patients was made using the motion analysis system. Additionally, categorisation was made according to the stance phase of gait, where knee hyperextension was at its highest. Findings: A weak relationship was found between maximum knee hyperextension angle and gastrocnemius spasticity, a moderate relationship between knee flexor muscle strength, and a moderate relationship between ankle dorsiflexor muscle strength. In addition, a weak relationship was found between the maximum knee hyperextension and pelvic retraction angles. According to this clustering, it was observed that 66.67 % of the participants (20 people) showed maximum knee hyperextension in the single support phase. It was observed that the participants who had maximum knee hyperextension, especially after the mid-stance phase, had higher mean gastrocnemius spasticity. It was also observed that participants in Cluster 4, with a greater amount of maximum knee hyperextension, had the worst clinical parameters. Interpretation: Our study observed that the degree of maximum knee hyperextension was related to knee flexor and ankle dorsiflexor muscle strengths, gastrocnemius spasticity and pelvic retraction. As clinical parameters worsened, maximum knee hyperextension was thought to occur late in the stance phase. Clinical Trial code: NCT05679700
Citation - WoS: 1
Citation - Scopus: 1
Investigation the Effect of Rigid Taping on Knee and Hip Joint Kinematics in Chronic Stroke Patients With Knee Hyperextension Gait
(Elsevier Ireland Ltd, 2025) Korkusuz, Suleyman; Fil-Balkan, Ayla; Korkusuz, Busra Seckinogullari; Ozgoren, Nihat; Aritan, Serdar; Ceren, Ali Naim; Topcuoglu, Mehmet Akif
Background: Although stroke patients gain an advantage in gait due to the knee hyperextension that occurs during the stance phase, this situation disrupts the biomechanical structure of the knee and increases the risk of injury to the capsular and ligamentous structures. The aim of this study was to examine the effects of rigid taping on hyperextension control and pelvic kinematics in stroke patients with knee hyperextension during the stance phase of gait. Research question: Does rigid taping have an effect on hyperextension control and pelvic kinematics in stroke patients with knee hyperextension? Methods: Thirty stroke patients aged between 40 and 70 were included in this pre-postintervention study. Kinematic assessment of gait was performed using a motion analysis system (Vicon Ltd, Bilston). Then, the rigid taping was applied to the patients using the hyperextension taping technique, and the kinematic analysis of the gait was repeated with the motion analysis system. Results: It was found that the rigid taping for the knee hyperextension significantly reduced the knee hyperextension (p < 0.05). Additionally, it was observed that the rigid taping significantly reduced the pelvic retraction (p < 0.05). However, no change was observed in the pelvic drop with the rigid taping application. Significance: Our results showed that the rigid taping effectively controlled the knee hyperextension. It was thought that the rigid taping application contributed to reducing knee hyperextension and pelvic retraction because it mechanically gave the knee a flexion moment and provided proprioceptive input.

Journal	Count
Journal of the American Podiatric Medical Association	2
Neurological Sciences	2
Gait & Posture	1
American Journal of Physical Medicine & Rehabilitation	1
Neurological Research	1

Korkusuz, Süleyman

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