Compound and Complex Odontomes: Case Series with Surgical Management and Brief Review of Literature.

Odontomas are the most commonly occurring odontogenic tumor, and earlier they were considered developmental anomaly as the morphodifferentiation of ameloblast does not occur in odontomas. Odontomas are considered hamartoma rather than true neoplasms as histologically they contain odontogenic tissues which are native to the oral cavity. These odontomas are usually asymptomatic and are revealed in radiographic examination but can also present with over-retained deciduous teeth and malocclusion and with other local complications such as infection.

Quantifying a frequency modulation response biomarker in responsive neurostimulation.

Responsive neurostimulation (RNS) is an effective treatment for controlling seizures in patients with drug-resistant focal epilepsy who are not suitable candidates for resection surgery. A lack of tools for detecting and characterizing potential response biomarkers, however, contributes to a limited understanding of mechanisms by which RNS improves seizure control. We developed a method to quantify ictal frequency modulation, previously identified as a biomarker of clinical responsiveness to RNS.

Low-Cost Carbon Fiber-Based Conductive Silicone Sponge EEG Electrodes.

We propose a novel carbon fiber-based conductive silicone sponge for low electrode-skin impedance EEG recordings. When this sponge is used with water or saline solution, no gel is required, lowering the setup time drastically compared to classical wet electrodes. Moreover, the wet conductive carbon fiber silicone sponges achieve an electrode-skin impedance as low as $2.

An Algorithm for Automated, Noninvasive Detection of Cortical Spreading Depolarizations Based on EEG Simulations.

Objective: We present a novel signal processing algorithm for automated, noninvasive detection of cortical spreading depolarizations (CSDs) using electroencephalography (EEG) signals and validate the algorithm on simulated EEG signals. CSDs are waves of neurochemical changes that suppress the neuronal activity as they propagate across the brain's cortical surface. CSDs are believed to mediate secondary brain damage after brain trauma and cerebrovascular diseases like stroke.

Very high density EEG elucidates spatiotemporal aspects of early visual processing.

Standard human EEG systems based on spatial Nyquist estimates suggest that 20-30 mm electrode spacing suffices to capture neural signals on the scalp, but recent studies posit that increasing sensor density can provide higher resolution neural information. Here, we compared "super-Nyquist" density EEG ("SND") with Nyquist density ("ND") arrays for assessing the spatiotemporal aspects of early visual processing. EEG was measured from 128 electrodes arranged over occipitotemporal brain regions (14 mm spacing) while participants viewed flickering checkerboard stimuli.