Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
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Clinical Trial
Evaluating the effects of spatial frequency on migraines by using pattern-reversal visual evoked potentials.
To clarify the effects of contrast and spatial frequency in patients with migraine by means of pattern-reversal visual evoked potentials (PVEPs). ⋯ These findings indicate that there is abnormal visual cortex processing in patients with migraine.
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The aim of this study was to analyse the regularity of the EEG background activity of Alzheimer's disease (AD) patients to test the hypothesis that the irregularity of the AD patients' EEG is lower than that of age-matched controls. ⋯ This article represents a first step in demonstrating the feasibility of ApEn for recognition of EEG changes in AD.
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To evaluate clinically and electrophysiologically the effects of selective anesthetic blocks of motor nerve branches to the triceps surae muscle on lower limb stretch reflex in patients with spastic equinus foot. ⋯ Selective anesthetic blocks of nerve branches to the triceps surae muscle are useful in the assessment of lower limb spasticity and can benefit from H reflex investigation. H reflex recordings showed a preferential susceptibility of muscle spindle afferents to local anesthetics and supported the hypothesis of a prominent role of the soleus muscle in spastic ankle. The clinical and electrophysiological effects induced by anesthetic blocks may help to guide therapeutic interventions, such as neurotomy, neurolysis or botulinum toxin injection.