نتایج جستجو برای: brain contralesional corticomotor excitability
تعداد نتایج: 485118 فیلتر نتایج به سال:
epilepsy is accompanied with a strong change in neuronal activity not only in excitatory (glutamatergic) and inhibitory (gabaergic) neurotransmission, but also in neuromodulatory agents. dopaminergic system, as an important neuromodulatory system of the brain, has significant effect on neuronal excitability. in addition, this system undergoes many changes in epileptic brain. understanding the e...
Prolonged wakefulness alters cortical excitability, which is essential for proper brain function and cognition. However, besides prior wakefulness, brain function and cognition are also affected by circadian rhythmicity. Whether the regulation of cognition involves a circadian impact on cortical excitability is unknown. Here, we assessed cortical excitability from scalp electroencephalography (...
Following stroke, the brain undergoes various stages of recovery where the central nervous system can reorganize neural circuitry (neuroplasticity) both spontaneously and with the aid of behavioral rehabilitation and non-invasive brain stimulation. Multiple neuroimaging techniques can characterize common structural and functional stroke-related deficits, and importantly, help predict recovery o...
We explored the mechanisms of spatial attention in the cat with a combination of permanent and reversible lesion techniques. Animals with large unilateral visual cortical lesions displayed profound blindness of contralesional visual space. However, cooling deactivation of either posterior parietal cortex or the superior colliculus (SC) in the contralesional half of the brain restored visual ori...
Unilateral Spatial Neglect, the most dramatic manifestation of contralesional space unawareness, is a highly heterogeneous syndrome. The presence of neglect is related to core spatially lateralized deficits, but its severity is also modulated by several domain-general factors (such as alertness or sustained attention) and by task demands. We previously showed that a computer-based dual-task par...
There is now compelling evidence that motor imagery (MI) and actual movement share common neural substrate. However, the question of how MI inhibits the transmission of motor commands into the efferent pathways in order to prevent any movement is largely unresolved. Similarly, little is known about the nature of the electromyographic activity that is apparent during MI. In addressing these gaps...
BACKGROUND Do central mechanisms account for the variability of clinical recovery following peripheral vestibulo-cochlear lesions? OBJECTIVE To investigate structural (morphological) plasticity in the human brain following unilateral vestibulo-cochlear lesions which might contribute to central vestibular compensation. METHODS The authors compared regional grey matter volume (GMV) changes in...
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