Parsing a cognitive task into a sequence of operations is a central problem in cognitive neuroscience. We argue that a major advance is now possible owing to the application of pattern classifiers to time-resolved recordings of brain activity [electroencephalography (EEG), magnetoencephalography (MEG), or intracranial recordings]. By testing at which moment a specific mental content becomes dec...

Natural stimuli consist of multiple properties. However, not all of these properties are equally relevant in a given situation. In this study, we applied multivariate classification algorithms to intracranial electroencephalography data of human epilepsy patients performing an auditory Stroop task. This allowed us to identify neuronal representations of task-relevant and irrelevant pitch and se...

The verbal transformation effect (VTE) refers to perceptual switches while listening to a speech sound repeated rapidly and continuously. It is a specific case of perceptual multistability providing a rich paradigm for studying the processes underlying the perceptual organization of speech. While the VTE has been mainly considered as a purely auditory effect, this paper presents a review of rec...

An imbalance between excitation (E) and inhibition (I) in the brain has been identified as a key pathophysiology of epilepsy over years. The hippocampus amygdala limbic system play crucial role initiation conduction epileptic seizures are often referred to transfer station amplifier seizure activities. Existing animal imaging studies reveal that amygdala, which significant parts vagal afferent ...

INTRODUCTION There is a clinical need for more accurate and earlier diagnosis of brain disorders using non-invasive methods like electroencephalography (EEG). Unfortunately, we have a very limited understanding about what EEG tells us about the brain, making it difficult to use as a diagnostic tool. Developing a better understanding of the brain activity that underlies EEG is critical to improv...

conclusions although, the exact cause of pseudotumor cerebri in most individuals is unknown, but we should remind tuberculosis specially in endemic area for this infection. case presentation here, we presented a 14-year-old girl who referred to our hospital for fever, headache, vomiting and diplopia which has not respond to antibiotic therapy for acute meningitis. finally, with more evaluations...

The discovery that electroencephalography (EEG) contains useful information at frequencies above the traditional 80Hz limit has had a profound impact on our understanding of brain function. In epilepsy, high-frequency oscillations (HFOs, >80Hz) have proven particularly important and useful. This literature review describes the morphology, clinical meaning, and pathophysiology of epileptic HFOs....

Anisocoria, or unequal pupil size, may be an early sign of an impending neurologic emergency in any patient.1 Acute unilateral mydriasis is often suggestive of a lifethreatening condition affecting cranial nerve function, such as tumor compression, intracranial hypertension with impending uncal herniation, expanding intracranial aneurysm, or hemorrhage. Benign mydriasis can be due to prior trau...

BACKGROUND Accurate localization and visualization of subdural electrodes implanted for intracranial electroencephalography in cases of medically refractory epilepsy remains a challenging clinical problem. OBJECTIVE We introduce a technique for creating accurate 3-dimensional (3D) brain models with electrode overlays, ideal for resective surgical planning. METHODS Our procedure uses postimp...