Background: Alzheimer dementia as the most common cause of dementia is a chronic, progressive, irreversible and incurable disease. The second most common cause of dementia after Alzheimer is vascular dementia. One of the systems involved in dementia is the visuospatial system and visual evoked potential (VEP) can be one of the diagnostic methods for this disease. Therefore, the present study ai...

how to cite this article: nafissi sh. electrophysiologic studies in patients with leukodystrophy. iran j child neurol autumn 2014;8:4 (suppl.1):8.   pls see pdf.

background: parkinson's disease (pd) is a neurodegenerative disorder impairing motor, verbal and other abilities. visual evoked potential (vep) assessment is a useful method for analysis of visual system and its function. the present study was designed in order to evaluate whether vep changes are associated with pd. m aterials and methods: in the present study, 100 subjects encompassing 40 pati...

background: multiple sclerosis (ms) is a chronic neurological disease that affects brain and spinal cord. the infratentorial region contains the cerebellum and brainstem. vestibular evoked myogenic potentials (vemps) are short-latency myogenic responses. cervical vestibular evoked myogenic potential (cvemp) is a manifestation of vestibulocolic reflex and ocular vestibular evoked myogenic potent...

background and aim: caffeine at low doses blocks adenosine receptors. these receptors are present in all parts of the body including auditory and vestibular system. this study aimed to evaluate the effects of caffeine on cervical vestibular evoked myogenic potential (cvemp). methods: in this interventional double-blind study, 40 cases (20 females and 20 males) aged 18-25 years were randomly ass...

background and aim: vestibular migraine is a type of migraine that causes vertigo, dizziness, and imbalance in addition to typical migraine symptoms. in this study, we aimed to investigate vestibular system in these patients by videonystagmography (vng), electrocochleography (ecochg), and vestibular evoked myogenic potential (vemp) testing. methods: this empirical study was conducted on 10 pati...

Dynamic random dot correlograms (DRDCs) are binocular stimuli that evoke a percept and a visual evoked potential (VEP) only in case of a mature and functional binocular system. DRDC-VEP is a method extensively used to study cortical binocularity in human infants and nonverbal children. Although the DRDC-VEP was invented 3 decades ago, neither the fundamental parameters, including contrast, of t...

To study components related to parallel processing of information across the visual field, multi-focal pattern reversal visual evoked potentials (VEPs) were recorded using binary m-sequences. Contrast, chromatic, spatial and temporal characteristics of the stimuli were varied in order to favor contributions from either M or P pathways. Responses were decomposed into two additive components whos...

migraine is a neurologic disease, which often is associated with a unilateral headache. vestibular abnormalities are common in migraine. vestibular evoked myogenic potentials (vemps) assess otolith function in particular functional integrity of the saccule and the inferior vestibular nerve. we used vemp to evaluate if the migraine headache can affect vemp asymmetry parameters. a total of 25 pat...

introduction: measuring the size of motor evoked potentials (meps) induced by transcranial magnetic stimulation (tms) is an investigational technique to show the level of corticospinal excitability however, some of the fundamental methodological aspects of tms (such as the effects of inter-pulse intervals (ipi) on mep size) are not fully understood, this issue raises concerns about the reliabil...