TY - JOUR AU - Keresztenyi, Z AU - Cesari, P AU - Fazekas, Gábor AU - Laczkó, József TI - The relation of hand and arm configuration variances while tracking geometric figures in Parkinson's disease: aspects for rehabilitation JF - INTERNATIONAL JOURNAL OF REHABILITATION RESEARCH J2 - INT J REHABIL RES VL - 32 PY - 2009 IS - 1 SP - 53 EP - 63 PG - 11 SN - 0342-5282 DO - 10.1097/MRR.0b013e32830d369c UR - https://m2.mtmt.hu/api/publication/1854524 ID - 1854524 AB - Variances of drawing arm movements between patients with Parkinson's disease and healthy controls were compared. The aim was to determine whether differences in joint synergies or individual joint rotations affect the endpoint (hand position) variance. Joint and endpoint coordinates were measured while participants performed drawing tasks. Variances of arm configurations and endpoints were computed and statistically analyzed for 12 patients and 12 controls. The variance of arm movements for patients (both for arm configuration and endpoint) was overall higher than that for the control group. Variation was smaller for drawing a circle versus a square and for drawing with the dominant versus the nondominant hand within both groups. The ratio of arm configuration variances between groups was similar to the ratio of endpoint variances. There were significant differences in the velocity, but not in the path lengths of movements comparing the two groups. Patients presented less movement stability while drawing different figures in different trials. Moreover, the similarity of the ratios suggests that the ill-coordinated hand movement was caused by the error in the movements of individual body parts rather than by the lack of intersegmental coordination. Thus, rehabilitation may focus on the improvement of the precision of individual joint rotations. LA - English DB - MTMT ER - TY - JOUR AU - Keresztenyi, Z AU - Valkovic, P AU - Eggert, T AU - Steude, U AU - Hermsdorfer, J AU - Laczkó, József AU - Botzel, K TI - The time course of the return of upper limb bradykinesia after cessation of subthalamic stimulation in Parkinson's disease JF - PARKINSONISM AND RELATED DISORDERS J2 - PARKINSONISM RELAT D VL - 13 PY - 2007 IS - 7 SP - 438 EP - 442 PG - 5 SN - 1353-8020 DO - 10.1016/j.parkreldis.2006.12.003 UR - https://m2.mtmt.hu/api/publication/1855286 ID - 1855286 AB - To investigate the time span within which bradykinesia re-occurs, we registered movement parameters immediately after the termination of deep brain stimulation of the subthalamic nucleus (STN) in nine Parkinson patients with chronically implanted bilateral STN electrodes. Two repetitive movements were investigated: finger-tapping and forearm pronation-supination. When stimulation was switched off, the amplitude and velocity of the investigated movements significantly declined, but the frequency did not. The time course of this decline was modeled by an exponential function that yielded time constants between 15 and 30 s. The effect of stimulation had completely disappeared within 1 min. These results suggest that it is necessary to wait at least for 1 min after the end of stimulation before performing further assessments. (C) 2007 Elsevier Ltd. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Laczkó, József AU - Keresztényi, Z TI - Variances of Hand Positions and Arm Configurations During Arm Movements Under External Load and Without External Load JF - MOTOR CONTROL J2 - MOTOR CONTROL VL - 11 PY - 2007 IS - Supplement SP - S127 SN - 1087-1640 UR - https://m2.mtmt.hu/api/publication/1861130 ID - 1861130 N1 - Progress in Motor Control VI LA - English DB - MTMT ER - TY - JOUR AU - Keresztényi, Zoltán AU - Laczkó, József TI - Teher hatása a karizom aktivitásra a gravitáció irányába és azzal ellentétes irányba történő mozgásnál JF - MAGYAR SPORTTUDOMÁNYI SZEMLE J2 - M SPORTTUD SZLE VL - 7 PY - 2006 IS - 4 (28) SP - 3 EP - 5 PG - 3 SN - 1586-5428 UR - https://m2.mtmt.hu/api/publication/1860858 ID - 1860858 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Domkin, D AU - Laczkó, József AU - Djupsjöbacka, M AU - Jaric, S AU - Latash, ML TI - Joint angle variability in 3D bimanual pointing: uncontrolled manifold analysis JF - EXPERIMENTAL BRAIN RESEARCH J2 - EXP BRAIN RES VL - 163 PY - 2005 IS - 1 SP - 44 EP - 57 PG - 14 SN - 0014-4819 DO - 10.1007/s00221-004-2137-1 UR - https://m2.mtmt.hu/api/publication/140416 ID - 140416 LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Mónika AU - Fazekas, Gábor AU - Tihanyi, T AU - Tihanyi, József TI - Standing stability of hemiparetic patients estimated in different ways JF - FACTA UNIVERSITATIS SERIES: PHYSICAL EDUCATION AND SPORT J2 - FACTA UNIV SER PHYS EDUC SPORT VL - 3 PY - 2005 IS - 1 SP - 59 EP - 68 PG - 10 SN - 1451-740X UR - https://m2.mtmt.hu/api/publication/1819259 ID - 1819259 LA - English DB - MTMT ER - TY - JOUR AU - Jobbágy, Ákos AU - Harcos, Péter AU - Karoly, R AU - Fazekas, Gábor TI - Analysis of finger-tapping movement JF - JOURNAL OF NEUROSCIENCE METHODS J2 - J NEUROSCI METH VL - 141 PY - 2005 IS - 1 SP - 29 EP - 39 PG - 11 SN - 0165-0270 DO - 10.1016/j.jneumeth.2004.05.009 UR - https://m2.mtmt.hu/api/publication/2102523 ID - 2102523 AB - The piano-playing-like finger-tapping movement has been analyzed with a precision image-based motion analyzer (PRIMAS). 32 healthy subjects (148 recordings) and 10 Parkinsonian patients (25 recordings) were tested. The tracking of fingers during the whole movement increased the level of information obtained from the finger-tapping test compared to visual observation or to measurement with simple contact sensors. Different feature extraction methods have been developed to evaluate the movement and thus the actual performance of the tested person. The reliability of a novel parameter, the finger-tapping test score (FTTS), that takes into account both the speed and the regularity (periodicity) of finger-tapping, was assessed in six control subjects, with four subjects tested at least 14 times. FTTS helps in staging of Parkinsonian patients. A simple and cheap device (passive marker-based analyser of movement, PAM) has been developed that is affordable for routine clinical use. © 2004 Elsevier B.V. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Laczkó, József TI - Végtagok mozgás-szabályozásának modellezése JF - IME J2 - IME VL - 4 PY - 2005 IS - 8 SP - 42 EP - 46 PG - 5 SN - 1588-6387 UR - https://m2.mtmt.hu/api/publication/1860729 ID - 1860729 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Vörös, T AU - Keresztényi, Z AU - Fazekas, Cs AU - Laczkó, József TI - Computer aided interactive remote diagnosis using self-organizing maps. Conference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 TS - Conference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 JF - PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY J2 - PROC ANN INT CONF IEEE ENG IN MED BIOL SOC VL - 26 PY - 2004 SP - 3190 EP - 3193 PG - 4 SN - 1094-687X UR - https://m2.mtmt.hu/api/publication/1857174 ID - 1857174 AB - A software tool has been developed to support the objective diagnosis of patients with Parkinson's Disease (PD). Patients completed hand exercises using a personal computer mouse and data has been gathered for further studies. We have analyzed different parameters and suggest using a particular parameter vector containing median and standard deviation values for tracking the daily changes in PD patients' status. Using the classification abilities of self-organizing feature maps (SOFM) we were able to provide support for the diagnostic process. LA - English DB - MTMT ER - TY - CHAP AU - Vörös, Tibor AU - Fazekas, Csaba AU - Keresztényi, Zoltán AU - Laczkó, József AU - Schné, Tamás ED - Baud, R ED - Fieschi, M ED - Le Beux, P ED - Ruch, P TI - Using Dynamic Tests in Computer Aided Interactive Remote Diagnosis T2 - The new navigators PB - IOS Press CY - Amsterdam SN - 1586033476 T3 - Studies in Health Technology and Informatics, ISSN 0926-9630 ; 95. PY - 2003 SP - 572 EP - 576 PG - 5 UR - https://m2.mtmt.hu/api/publication/1865924 ID - 1865924 LA - English DB - MTMT ER - TY - JOUR AU - Domkin, D AU - Laczkó, József AU - Jaric, S AU - Johansson, H AU - Latash, ML TI - Structure of joint variability in bimanual pointing tasks JF - EXPERIMENTAL BRAIN RESEARCH J2 - EXP BRAIN RES VL - 143 PY - 2002 IS - 1 SP - 11 EP - 23 PG - 13 SN - 0014-4819 DO - 10.1007/s00221-001-0944-1 UR - https://m2.mtmt.hu/api/publication/139813 ID - 139813 LA - English DB - MTMT ER - TY - CHAP AU - Laczkó, József AU - Jaric, S AU - Domkin, D AU - Johansson, H AU - Latash, ML ED - IEEE, null TI - Stabilization of Kinematic Variables in the Control of Bimanual Pointing Movements T2 - International Joint Conference on Neural Networks, IJCNN '01 PB - IEEE CY - Piscataway (NJ) SN - 0780370449 T3 - Proceedings of the International Joint Conference on Neural Networks, ISSN 1098-7576 PY - 2001 SP - 1256 EP - 1260 PG - 5 UR - https://m2.mtmt.hu/api/publication/139599 ID - 139599 N1 - WoS:hiba:000172784800223 2020-09-03 09:29 befoglaló egyiknél nincsenek szerzők, befoglaló cím nem egyezik LA - English DB - MTMT ER - TY - JOUR AU - Laczkó, József AU - Jaric, S AU - Tihanyi, József AU - Zatsiorsky, VM AU - Latash, ML TI - Components of the End-Effector Jerk during Voluntary Arm Movements JF - JOURNAL OF APPLIED BIOMECHANICS J2 - J APPL BIOMECH VL - 16 PY - 2000 IS - 1 SP - 14 EP - 25 PG - 12 SN - 1065-8483 DO - 10.1123/jab.16.1.14 UR - https://m2.mtmt.hu/api/publication/1040422 ID - 1040422 LA - English DB - MTMT ER - TY - JOUR AU - Laczkó, József TI - Modelling of multi-joint movements JF - KALOKAGATHIA J2 - KALOKAGATHIA VL - 38 PY - 2000 IS - 75th Anniversary Special Issue SP - 91 EP - 96 PG - 6 SN - 1218-1498 UR - https://m2.mtmt.hu/api/publication/139672 ID - 139672 LA - English DB - MTMT ER - TY - JOUR AU - Laczkó, József TI - Karmozgásminták függése mozgásvezérlő stratégiáktól és rejtett paraméterektől: klinikai teszt szimulációval JF - REHABILITÁCIÓ: A MAGYAR REHABILITÁCIÓS TÁRSASÁG FOLYÓIRATA J2 - REHABILITÁCIÓ VL - 4 PY - 1994 IS - 4 SP - 349 EP - 353 PG - 5 SN - 0866-479X UR - https://m2.mtmt.hu/api/publication/138659 ID - 138659 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Pellionisz, AJ AU - LeGoff, B AU - Laczkó, József ED - Berthoz, A ED - Graf, W ED - Vidal, PP TI - Multidimensional Geometry Intrinsic to Head Movements around Distributed Centers of Rotation. A Neurocomputer Paradigm TS - A Neurocomputer Paradigm T2 - The Head-neck sensory motor system PB - Oxford University Press CY - New York, New York SN - 0195068203 PY - 1992 SP - 158 EP - 167 PG - 10 DO - 10.1093/acprof:oso/9780195068207.003.0023 UR - https://m2.mtmt.hu/api/publication/1862017 ID - 1862017 LA - English DB - MTMT ER - TY - CHAP AU - Laczkó, József AU - Pellionisz, A AU - Jongen, H AU - Gielen, CCAM ED - Society, for Neuroscience TI - Computer Modeling of Human Forelimb Muscle Activation in Multidimensional Intrinsic Coordinate Frames T2 - Society for Neuroscience Abstracts: Volume 14, 18th Annual Meeting, Toronto, Ontario, November 13-18,1988, 2. rész PB - Society for Neuroscience CY - Toronto SN - 0916110303 PY - 1988 SP - 955 PG - 1 UR - https://m2.mtmt.hu/api/publication/2538957 ID - 2538957 LA - English DB - MTMT ER -