objective: transplantation of bone marrow stromal cells (bmscs) or schwann cells (scs) can facilitate axonal regeneration in peripheral nerve injuries. the aim of this study was to compare the effects of transplantation of bmscs and scs on functional recovery after injury to the sciatic nerve in the rat. materials and methods:in this experimental research, adult male wistar rats (n=24, 250-300 ...

Neural oscillations have emerged as one of the major electrophysiological phenomena investigated in cognitive and systems neuroscience. These oscillations are typically studied with regard to their amplitude, phase, and/or phase coupling. Here we demonstrate the existence of another property that is intrinsic to neural oscillations but has hitherto remained largely unexplored in cognitive and s...

Arrhythmias are usually present in up to 80% of the patients7, with prevalence of anomalous atrioventricular pathways ranging from 0 to 44%1-3. Despite the universal acceptance of electrophysiological study (EPS) in symptomatic patients or in those with apparent accessory pathway on the electrocardiogram (ECG), data on asymptomatic patients with no electrocardiographic evidence of pre-excitatio...

Introduction Focal atrial tachycardia (AT) accounts for 5%–15% of arrhythmias in adults who undergo electrophysiological study (EPS) for paroxysmal supraventricular tachycardia, and it can be generated by enhanced automaticity, triggered activity, and microreentry. Radiofrequency catheter ablation (RFCA) has been reported as a curative therapy for AT with a high success rate. While almost all i...

In electrophysiology studies, it is becoming increasingly common to explain experimental observations using both descriptive methods and quantitative approaches. However, some electrophysiological phenomena, such as the generation of extracellular potentials that results from the propagation of the excitation source along the muscle fiber, are difficult to describe and conceptualize. In additio...

Mammalian memory is the result of the interaction of millions of neurons in the brain and their coordinated activity. Candidate mechanisms for memory are synaptic plasticity changes, such as long-term potentiation (LTP). LTP is essentially an electrophysiological phenomenon manifested in hours-lasting increase on postsynaptic potentials after synapse tetanization. It is thought to ensure long-t...

The Brugada syndrome (BrS) is an arrhythmogenic disease associated with an increased risk of ventricular fibrillation and sudden cardiac death. The risk stratification and management of BrS patients, particularly of asymptomatic ones, still remains challenging. A previous history of aborted sudden cardiac death or arrhythmic syncope in the presence of spontaneous type 1 ECG pattern of BrS pheno...