Abnormal patterns of theta frequency oscillations during the temporal evolution of freezing of gait in Parkinson’s disease

Shine, James M.; Handojoseno, A. M. Ardi; Nguyen, Tuan Nghia; Tran, Yvonne; Naismith, Sharon L.; Nguyen, Hung T.; Lewis, Simon J.G.

doi:10.1016/j.clinph.2013.09.006

Cited by 104 publications

(115 citation statements)

References 79 publications

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“…Moreover, ULF was paralleled by increased cortical BOLD activity in the left dorsolateral prefrontal cortex, motor cortex, supplementary motor area, and dorsal premotor area (Vercruysse et al, 2013). A recent EEG study found increased cortical theta band activity during both transition from normal movement to freezing and freezing itself (Shine et al, 2014). Together, these findings substantiate the view that freezing phenomena are paralleled by maladaptive processing on both cortical and subcortical levels.…”

Section: Introductionsupporting

confidence: 76%

Neuromuscular correlates of subthalamic stimulation and upper limb freezing in Parkinson’s disease

Scholten

Klotz

Plewnia

et al. 2016

Clinical Neurophysiology

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Section: Introductionsupporting

confidence: 76%

Neuromuscular correlates of subthalamic stimulation and upper limb freezing in Parkinson’s disease

Scholten

Klotz

Plewnia

et al. 2016

Clinical Neurophysiology

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“…Turning is a complex motor task requiring both motor and cognitive processing to enable the correct selection, timing and scaling of movement. In addition, in PD patients with FOG the symptom can be exacerbated by emotion, attention and dopaminergic therapy, suggesting the existence of a complex pathophysiological process that not only involves the locomotor networks but also differing cortical areas and the basal ganglia system [3], [4], [5]. Despite advances in our understanding of FOG from recent neuroimaging work [6], the neurobiology specifically associated with turn provoked FOG remains unknown.…”

Section: Introductionmentioning

confidence: 99%

“…Our group has developed a detection algorithm for recognizing FOG by analyzing energy power, entropy, correlation and brain effective connectivity (BEC) of EEG signals, providing valuable insights into the underlying brain mechanism [3], [7], [8]. However, these previous studies have focused on episodes of freezing that had mixed provocation factors.…”

Section: Introductionmentioning

confidence: 99%

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An EEG study of turning freeze in Parkinson's disease patients: The alteration of brain dynamic on the motor and visual cortex

Handojoseno

Gilat

et al. 2015

2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

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Abstract-Freezing of gait is a very debilitating symptom affecting many patients with Parkinson's disease, leading to a reduced mobility and increased risk for falls. Turning is known to be the most provocative trigger for freezing of gait. However, the underlying brain dynamic changes associated with a turning freeze remain unknown. This study therefore used ambulatory EEG to investigate the brain dynamic changes associated with freezing of gait during turning. In addition, this study aimed to determine the most suitable EEG sensor location to detect freezing of gait during turning using our classification system. Data from four Parkinson's disease patients with freezing of gait was analysed using power spectral density and brain effective connectivity, comparing periods of successful turning with freezing of gait during turning. Results showed that freezing of gait during turning is associated with significant alterations in the high beta and theta power spectral densities across the occipital and parietal areas. Furthermore, brain effective connectivity showed that freezing during turning was associated with increased connectivity towards the visual area, which also had the highest accuracy to detect freezing episodes in the O1 regions by using power spectral density in our classification analyses. This is the first study to show cortical dynamic changes associated with freezing of gait during turning, providing valuable information to enhance the performance of future freezing of gait detection systems.

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“…Combining with the change of groundwater level, the relationship between groundwater level and climate index is analyzed, which is of great significance for rational exploitation of groundwater resources. The widely used time-lag analysis method of time series is the cross wavelet transform method developed by wavelet analysis [8][9][10]. This method is also widely used in the field of groundwater, such as precipitation-runoff analysis, [11], groundwater level prediction, [12], water level and precipitation, the correlation of meteorological models, [13][14][15][16][17][18][19] and other research fields.…”

Section: Introductionmentioning

confidence: 99%

Cross wavelet analysis between groundwater level, precipitation, and temperature in Chaiwopu Basin

Feng¹,

Ren²,

Yin³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)

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Utilize the senior sequences from 2004 to 2016 of the 4 groundwater monitoring holes around Chaiwopu Lake in Xinjiang to observe the water level, precipitation and temperature, then use continuous wavelet and cross wavelet transform method to analyze the periodicity of water level, precipitation and temperature, and the correlation between each other. The results show that ① the main fluctuation period of groundwater level of Chaiwopu Lake, precipitation and temperature, and the resonance period between them both are 1 years. ② The groundwater level time-lag of phreatic water is less than that of confined water. ③ The time-lag between precipitation and groundwater level is greater than that between temperature and groundwater level. Through this mathematical statistics, we can almost master the time-lag relationship between the groundwater level with precipitation and temperature, in the later study, it is necessary to strengthen the analysis to the physical mechanism of the interaction between the three factors.

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Abnormal patterns of theta frequency oscillations during the temporal evolution of freezing of gait in Parkinson’s disease

Cited by 104 publications

References 79 publications

Neuromuscular correlates of subthalamic stimulation and upper limb freezing in Parkinson’s disease

Neuromuscular correlates of subthalamic stimulation and upper limb freezing in Parkinson’s disease

An EEG study of turning freeze in Parkinson's disease patients: The alteration of brain dynamic on the motor and visual cortex

Cross wavelet analysis between groundwater level, precipitation, and temperature in Chaiwopu Basin

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