Medicine is a complex field with highly trained specialists extensive knowledge that continuously needs updating. Among them all, those who study the brain can perform tasks due to structure of this organ. There are neurological diseases such as degenerative ones whose diagnoses essential in very early stages. Parkinson’s disease one them, usually having confirmed diagnosis when it alrea...

Seven patients with cerebrotendinous xanthomatosis (CTX) were studied by electrophysiological techniques. The percentages of abnormalities detected in nerve conduction studies and electroencephalograms were 28.6% (two patients) and 100%, respectively. All patients showed prolonged central conduction times in short latency somatosensory evoked potentials (SSEPs) by tibial nerve stimulation but n...

The origin and mechanisms of human interictal epileptic discharges remain unclear. Here, we describe a spontaneous, rhythmic activity initiated in the subiculum of slices from patients with temporal lobe epilepsy. Synchronous events were similar to interictal discharges of patient electroencephalograms. They were suppressed by antagonists of either glutamatergic or gamma-aminobutyric acid (GABA...

A new method for classification is proposed. This is based on kernel orthonormalized partial least squares (PLS) dimensionality reduction of the original data space followed by a support vector classifier. Unlike principal component analysis (PCA), which has previously served as a dimension reduction step for discrimination problems, orthonormalized PLS is closely related to Fisher’s approach t...

In this paper, a hybrid method is proposed for multi-channel electroencephalograms (EEG) signal compression. This new method takes advantage of two different compression techniques: fractal and wavelet-based coding. First, an effective decorrelation is performed through the principal component analysis of different channels to efficiently compress the multi-channel EEG data. Then, the decorrela...

Eleven patients who had islet cell tumours of the pancreas removed over a 20-year period were reviewed. Two had died, one in the postoperative period and one 10 years post-operatively. The remaining nine were traced and eight of them were personally interviewed and tested. All nine were well and free from recurrent symptoms. Five of the eight had evidence of subnormal insulin production in resp...

The monitoring of microvolt-level biosignals such as electroencephalograms requires the application low-noise signal amplifier circuits, which, for single-use cases, must be fabricated disposability using low-cost manufacturing techniques. One promising solution production circuits digital biosensing is emerging technology printed circuits. Here, a low-noise-electrode printing process organic t...

we propose a novel approach for detecting precursors to epileptic seizures in intracranial electroencephalograms (ieeg), which is based on the analysis of system dynamics. in the proposed scheme, the largest lyapunov exponent of the discrete wavelet packet transform (dwpt) of the segmented eeg signals is considered as the discriminating features. such features are processed by a support vector ...

Cats attended to either visual or acoustic moving stimuli in order to perceive the location of their disappearance, which signaled reward in left or right foodwell. The analysis of concomitant electroencephalograms revealed an elevation of the 20 Hz band in the Fourier spectra of activity of respective visual and auditory projection cortices. These oscillations appeared only on the trials that ...