Objective Detection of Subtle Freezing of Gait Episodes in Parkinson's Disease
Identifieur interne : 000525 ( PascalFrancis/Corpus ); précédent : 000524; suivant : 000526Objective Detection of Subtle Freezing of Gait Episodes in Parkinson's Disease
Auteurs : Arnaud Delval ; Anke H. Snijders ; Vivian Weerdesteyn ; Jacques E. Duysens ; Luc Defebvre ; Nir Giladi ; Bastiaan R. BloemSource :
- Movement disorders [ 0885-3185 ] ; 2010.
Descripteurs français
- Pascal (Inist)
English descriptors
Abstract
Freezing of gait (FOG) is a clinically defined phenomenon of Parkinson's disease (PD). Recent evidence suggests that subtle FOG episodes can be elicited in a gait laboratory using suddenly appearing obstacles during treadmill walking. We evaluated which quantitative gait parameters identify such subtle FOG episodes. We included 10 PD patients with FOG, 10 PD patients without FOG, and 10 controls. Subjects walked on a motorized treadmill while avoiding unexpectedly appearing obstacles. Treadmill walking was videotaped, and FOG episodes were identified by two independent experts. Gait was also analyzed using detailed kinematics. Knee joint signals were processed using time-frequency analysis with combinations of sliding fast Fourier transform and wavelets transform. Twenty FOG episodes occurred during treadmill walking in 5 patients (all with clinically certified FOG), predominantly in relation to obstacle avoidance. FOG was brief when it occurred just before or after obstacle crossing and was characterized by short, rapid steps. Frequency analysis showed a typical qualitative pattern: before the FOG episode an increase in dominant frequency in the 0 to 3 Hz band (festination), followed by decreased power in 0 to 3 Hz band and an increased power in the 3 to 8 Hz band during the FOG episode. This pattern led to an increased FOG index as a qualitative measure. These approaches detected even very brief FOG with acceptable sensitivity (75-83%) and specificity (>95%). We conclude that time-frequency analysis is an appropriate approach to detect brief and subtle FOG episodes. Future work will need to decide whether this approach can support or even replace expert clinical opinion.
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Pour connaître la documentation sur le format Inist Standard.
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Format Inist (serveur)
NO : | PASCAL 10-0413292 INIST |
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ET : | Objective Detection of Subtle Freezing of Gait Episodes in Parkinson's Disease |
AU : | DELVAL (Arnaud); SNIJDERS (Anke H.); WEERDESTEYN (Vivian); DUYSENS (Jacques E.); DEFEBVRE (Luc); GILADI (Nir); BLOEM (Bastiaan R.) |
AF : | Department of Neurology and Movement Disorders, Regional University Hospital/Lille/France (1 aut., 5 aut.); Department of Clinical Neurophysiology, Regional University Hospital/Lille/France (1 aut.); Department of Neurology, Donders Center for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Centre/Nijmegen/Pays-Bas (1 aut., 2 aut., 7 aut.); Department of Rehabilitation, Radboud University Nijmegen Medical Centre/Nijmegen/Pays-Bas (3 aut., 4 aut.); Movement Disorders Unit, Department of Neurology, Tel-Aviv Sourasky Medical Center, Sackler School of Medicine, Tel-Aviv University/Tel-Aviv/Israël (6 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Movement disorders; ISSN 0885-3185; Etats-Unis; Da. 2010; Vol. 25; No. 11; Pp. 1684-1693; Bibl. 30 ref. |
LA : | Anglais |
EA : | Freezing of gait (FOG) is a clinically defined phenomenon of Parkinson's disease (PD). Recent evidence suggests that subtle FOG episodes can be elicited in a gait laboratory using suddenly appearing obstacles during treadmill walking. We evaluated which quantitative gait parameters identify such subtle FOG episodes. We included 10 PD patients with FOG, 10 PD patients without FOG, and 10 controls. Subjects walked on a motorized treadmill while avoiding unexpectedly appearing obstacles. Treadmill walking was videotaped, and FOG episodes were identified by two independent experts. Gait was also analyzed using detailed kinematics. Knee joint signals were processed using time-frequency analysis with combinations of sliding fast Fourier transform and wavelets transform. Twenty FOG episodes occurred during treadmill walking in 5 patients (all with clinically certified FOG), predominantly in relation to obstacle avoidance. FOG was brief when it occurred just before or after obstacle crossing and was characterized by short, rapid steps. Frequency analysis showed a typical qualitative pattern: before the FOG episode an increase in dominant frequency in the 0 to 3 Hz band (festination), followed by decreased power in 0 to 3 Hz band and an increased power in the 3 to 8 Hz band during the FOG episode. This pattern led to an increased FOG index as a qualitative measure. These approaches detected even very brief FOG with acceptable sensitivity (75-83%) and specificity (>95%). We conclude that time-frequency analysis is an appropriate approach to detect brief and subtle FOG episodes. Future work will need to decide whether this approach can support or even replace expert clinical opinion. |
CC : | 002B17; 002B17G |
FD : | Maladie de Parkinson; Pathologie du système nerveux; Dépistage; Congélation |
FG : | Pathologie de l'encéphale; Syndrome extrapyramidal; Maladie dégénérative; Pathologie du système nerveux central |
ED : | Parkinson disease; Nervous system diseases; Medical screening; Freezing |
EG : | Cerebral disorder; Extrapyramidal syndrome; Degenerative disease; Central nervous system disease |
SD : | Parkinson enfermedad; Sistema nervioso patología; Descubrimiento; Congelación |
LO : | INIST-20953.354000192608100220 |
ID : | 10-0413292 |
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Pascal:10-0413292Le document en format XML
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<front><div type="abstract" xml:lang="en">Freezing of gait (FOG) is a clinically defined phenomenon of Parkinson's disease (PD). Recent evidence suggests that subtle FOG episodes can be elicited in a gait laboratory using suddenly appearing obstacles during treadmill walking. We evaluated which quantitative gait parameters identify such subtle FOG episodes. We included 10 PD patients with FOG, 10 PD patients without FOG, and 10 controls. Subjects walked on a motorized treadmill while avoiding unexpectedly appearing obstacles. Treadmill walking was videotaped, and FOG episodes were identified by two independent experts. Gait was also analyzed using detailed kinematics. Knee joint signals were processed using time-frequency analysis with combinations of sliding fast Fourier transform and wavelets transform. Twenty FOG episodes occurred during treadmill walking in 5 patients (all with clinically certified FOG), predominantly in relation to obstacle avoidance. FOG was brief when it occurred just before or after obstacle crossing and was characterized by short, rapid steps. Frequency analysis showed a typical qualitative pattern: before the FOG episode an increase in dominant frequency in the 0 to 3 Hz band (festination), followed by decreased power in 0 to 3 Hz band and an increased power in the 3 to 8 Hz band during the FOG episode. This pattern led to an increased FOG index as a qualitative measure. These approaches detected even very brief FOG with acceptable sensitivity (75-83%) and specificity (>95%). We conclude that time-frequency analysis is an appropriate approach to detect brief and subtle FOG episodes. Future work will need to decide whether this approach can support or even replace expert clinical opinion.</div>
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<ET>Objective Detection of Subtle Freezing of Gait Episodes in Parkinson's Disease</ET>
<AU>DELVAL (Arnaud); SNIJDERS (Anke H.); WEERDESTEYN (Vivian); DUYSENS (Jacques E.); DEFEBVRE (Luc); GILADI (Nir); BLOEM (Bastiaan R.)</AU>
<AF>Department of Neurology and Movement Disorders, Regional University Hospital/Lille/France (1 aut., 5 aut.); Department of Clinical Neurophysiology, Regional University Hospital/Lille/France (1 aut.); Department of Neurology, Donders Center for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Centre/Nijmegen/Pays-Bas (1 aut., 2 aut., 7 aut.); Department of Rehabilitation, Radboud University Nijmegen Medical Centre/Nijmegen/Pays-Bas (3 aut., 4 aut.); Movement Disorders Unit, Department of Neurology, Tel-Aviv Sourasky Medical Center, Sackler School of Medicine, Tel-Aviv University/Tel-Aviv/Israël (6 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Movement disorders; ISSN 0885-3185; Etats-Unis; Da. 2010; Vol. 25; No. 11; Pp. 1684-1693; Bibl. 30 ref.</SO>
<LA>Anglais</LA>
<EA>Freezing of gait (FOG) is a clinically defined phenomenon of Parkinson's disease (PD). Recent evidence suggests that subtle FOG episodes can be elicited in a gait laboratory using suddenly appearing obstacles during treadmill walking. We evaluated which quantitative gait parameters identify such subtle FOG episodes. We included 10 PD patients with FOG, 10 PD patients without FOG, and 10 controls. Subjects walked on a motorized treadmill while avoiding unexpectedly appearing obstacles. Treadmill walking was videotaped, and FOG episodes were identified by two independent experts. Gait was also analyzed using detailed kinematics. Knee joint signals were processed using time-frequency analysis with combinations of sliding fast Fourier transform and wavelets transform. Twenty FOG episodes occurred during treadmill walking in 5 patients (all with clinically certified FOG), predominantly in relation to obstacle avoidance. FOG was brief when it occurred just before or after obstacle crossing and was characterized by short, rapid steps. Frequency analysis showed a typical qualitative pattern: before the FOG episode an increase in dominant frequency in the 0 to 3 Hz band (festination), followed by decreased power in 0 to 3 Hz band and an increased power in the 3 to 8 Hz band during the FOG episode. This pattern led to an increased FOG index as a qualitative measure. These approaches detected even very brief FOG with acceptable sensitivity (75-83%) and specificity (>95%). We conclude that time-frequency analysis is an appropriate approach to detect brief and subtle FOG episodes. Future work will need to decide whether this approach can support or even replace expert clinical opinion.</EA>
<CC>002B17; 002B17G</CC>
<FD>Maladie de Parkinson; Pathologie du système nerveux; Dépistage; Congélation</FD>
<FG>Pathologie de l'encéphale; Syndrome extrapyramidal; Maladie dégénérative; Pathologie du système nerveux central</FG>
<ED>Parkinson disease; Nervous system diseases; Medical screening; Freezing</ED>
<EG>Cerebral disorder; Extrapyramidal syndrome; Degenerative disease; Central nervous system disease</EG>
<SD>Parkinson enfermedad; Sistema nervioso patología; Descubrimiento; Congelación</SD>
<LO>INIST-20953.354000192608100220</LO>
<ID>10-0413292</ID>
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