Characteristics of parkinsonian and ataxic gaits: a study using surface electromyograms, angular displacements and floor reaction forces

Mitoma, Hiroshi; Hayashi, Ryoichi; Yanagisawa, Nobuo; Tsukagoshi, Hiroshi

doi:10.1016/s0022-510x(99)00329-9

Cited by 100 publications

(102 citation statements)

References 29 publications

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“…Indeed, for particular muscles such as cBF an increase in response amplitude in some phases of the step cycle (second half of the contralateral step cycle) could be partly related to increased background EMG activity in PD subjects. This additional background activity is consistent with earlier findings since increased EMG activity patterns during parkinsonian gait have been reported for BF by several authors (Cioni et al 1997;Dietz et al 1997;Mitoma et al 2000). However, the changes in reflex amplitudes in cBF were not limited to the phases with increased background.…”

Section: Phase-dependent Increase In Cbf In Some Pd Patientssupporting

confidence: 93%

“…For example, under conditions that resemble limping, TA activity was observed during the stance phase of the more stable leg in both healthy subjects (Dietz et al 1994;Duysens et al 2004b) and patients with PD . Under stable conditions, however, there is usually no extra TA activity during the stance phase (Cioni et al 1997;Dietz et al 1981Dietz et al , 1995Dietz et al , 1997Lewis et al 2000;Mitoma et al 2000; for exceptions see Cioni et al 1997;Dietz et al 1995). This extra TA activity is not due to the slower speed since the TA does not show extra activity during the stance phase in slow gait (Den Otter et al 2004).…”

Section: Phase-dependent Increase In Cbf In Some Pd Patientsmentioning

confidence: 99%

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Modulation of Cutaneous Reflexes From the Foot During Gait in Parkinson's Disease

Duysens

Wezel

Smits-Engelsman

2010

Journal of Neurophysiology

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Section: Phase-dependent Increase In Cbf In Some Pd Patientssupporting

confidence: 93%

Section: Phase-dependent Increase In Cbf In Some Pd Patientsmentioning

confidence: 99%

Modulation of Cutaneous Reflexes From the Foot During Gait in Parkinson's Disease

Duysens

Wezel

Smits-Engelsman

2010

Journal of Neurophysiology

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“…이와 같은 변화는 신체의 고유수용기(proprioceptive)의 피 드백 제공으로 인한 자세조절과 스텝조절의 협응력이 감소한 결과이다 (Nieuwboer et al, 2004) Mitoma et al(2000) 은 건강한 집단에 비해서 파킨슨 환자들은 전경골근과 비복근 의 근육활동이 감소하였다고 보고하였는데, 본 연구의 결과도 선행연구와 일치하였다.…”

Section: Muscleunclassified

Analysis of Lower Extremity Muscle Activities in Parkinson's Patients for Improving to Stop Task

양창수¹,

임비오²

2012

Korean Journal of Sport Biomechanics

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Freezing of gait is a severely problem in people with Parkinson's disease. The purpose of this study was to investigate the muscle activities of adductor longus, gluteus medius, gluteus maximus, biceps femoris, rectus femoris, gastrocnemius, and tibialis anterior using Noraxon 8 channels EMG system during stop task in patients with Parkinson's disease. Seven parkinson's patients and age matched normal participants were recruited in the study. Filtered EMG signals were rectified, smoothed and integrated. To control for the altered timing and magnitude of activity, iEMG was normalized for time and peak value. The results indicated that the patients with Parkinson showed decreased gait cycle, stance phase, swing phase time, swing phase time ratio and increased stance phase time ratio than normal participants. The patients with Parkinson showed decreased gastrocnemius muscle activity time ratio, while increased tibialis anterior muscle activity time ratio than normal participants. During stance phase before stop, the patients with Parkinson showed relatively lower average and peak iEMG in anterior tibialis and gastrocnemius muscle than normal participants. During swing phase before stop, the patients with Parkinson showed relatively higher average iEMG in gastrocnemius muscle than normal participants. During stop phase, the patients with Parkinson showed relatively lower average and peak iEMG in anterior tibialis and gastrocnemius muscle than normal participants.

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“…On the other hand, patients with vascular parkinsonism (VP) exhibit upright posture of the trunk and neck, stiff leg movements, short steps with frequent shuffling, slightly wide-based stance, and impaired postural reflexes that can lead to falls [4][5][6][7][8][9]. Patients with cerebellar ataxia (CA) walk with exaggerated swing of the trunk and wide-based stance; their gait cycles are slow and irregular [1,2,10]. Although gait disorder features have been defined clinically in each disease, the fundamental characteristics of various gait kinematic parameters have not yet been determined due to three methodological problems.…”

mentioning

confidence: 99%

“…However, walking with short stride, wide stance, slow speed, and prolonged double support period is the final common expression of any dysfunction of the gait control system, not the characteristic change [5,10]. Thus, in addition to these nonspecific and secondary changes, the gait cycle or the floor reaction forces, parameters that are directly determined and controlled by neural circuits, should also be examined [5,10].…”

mentioning

confidence: 99%

A Newly Developed Wearable Device for Continuous Measurement of Gait- Induced Accelerations in Daily Activities

Mitoma

Yoneyama²

2014

rain Disord Ther

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For assessment of gait disorders, speed and stride are measured during 10m-walking test. However, changes in these two parameters are nonspecific since they are observed in various gait disorders. In addition, the10-m walking is short and reflects only one aspect of daily living and the results could be affected by emotional stress. To examine the step cycles and forces for step-in and kick off, which are directly controlled by a complex neural circuitry, during daily walking and over a long period of time, we developed a new wearing device, the portable gait rhythmogram (PGR), which monitors gait-induced accelerations for up to 70 hours. Quantitative analysis of the gait acceleration cycle and amplitude has allowed characterization of the bradykinematic features of gait disorders in patients with Parkinson's disease: 1) A decrease in amplitude of gait acceleration in the early stages of the disease, which is compensated by fast stepping. 2) Subjective motor fluctuation did not necessarily coincide with changes in gait parameters. The results suggest that the rhythms-force correlation is set by the basal ganglia, but can be modified by the cerebral cortex. Analysis of voluntary gait in daily life could enhance our understanding of the pathomechanisms of gait disorders.

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Characteristics of parkinsonian and ataxic gaits: a study using surface electromyograms, angular displacements and floor reaction forces

Cited by 100 publications

References 29 publications

Modulation of Cutaneous Reflexes From the Foot During Gait in Parkinson's Disease

Modulation of Cutaneous Reflexes From the Foot During Gait in Parkinson's Disease

Analysis of Lower Extremity Muscle Activities in Parkinson's Patients for Improving to Stop Task

A Newly Developed Wearable Device for Continuous Measurement of Gait- Induced Accelerations in Daily Activities

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