Neuronal information processing in cortical networks critically depends on the organization of synaptic connectivity. Synaptic connections can form when axons and dendrites come in close proximity of each other. The spatial innervation of neuronal arborizations can be described by their axonal and dendritic density fields. Recently we showed that potential locations of synapses between neurons ...

Background and Objective: Temporal lobe epilepsy is hallmarked with neuronal degeneration in some areas of hippocampus and mossy fiber sprouting in dentate area. Considering some evidences on neuroprotective and antioxidant activity of silymarin (SM), this study was undertaken to evaluate the preventive effect of this agent on structural changes in hippocampus of kainate-epileptic rats. Materia...

BACKGROUND Several in vitro studies have suggested levodopa (L-dopa) to be toxic to dopaminergic neurons and that it can modulate the aggregation process of α-synuclein. We investigated the relationship between cumulative lifetime dose of l-dopa and nigral neuronal count and Lewy body (LB) pathology in Parkinson disease (PD). METHODS Density of pigmented neurons was measured unilaterally in a...

Although the introduction of antiretroviral therapy has reduced the prevalence of severe forms of neurocognitive disorders, human immunodeficiency virus (HIV)-1-associated neurocognitive disorders were observed in 50% of HIV-infected patients globally. The blood-brain barrier is known to be impermeable to most of antiretroviral drugs. Successful delivery of antiretroviral drugs into the brain m...

BACKGROUND It is believed that in Alzheimer's disease (AD) some areas of the brain are particularly vulnerable to specific degenerative processes and that they could exhibit neuronal dysfunction in the earliest stage of the disease. The implications of the hippocampus in memory processes are very well known and it is likely that the hippocampus would be among the first areas of the brain affect...

Objective: Characterizing the spectral properties of neuronal responses is an important problem in computational neuroscience, as it provides insight into the spectral organization of the underlying functional neural processes. Although spectral analysis techniques are widely used in the analysis of noninvasive neural recordings such as EEG, their application to spiking data is limited due to t...

Objective(s): Umbilical cord blood-derived mesenchymal stromal cells (UCB-MSCs) are ideally suited for use in various cell-based therapies. We investigated a novel induction protocol (NIP) to improve the neuronal differentiation of human UCB-MSCs under appropriate conditions. Materials and Methods: This experimental study was performed in Iranian Blood Transfusion Organization (IBTO), Tehran, I...

background: stroke is one of the most frequent causes of death and disability worldwide and has significant clinical and socioeconomic impact. hyperlipidemia and inflammation play major roles in atherothrombosis and in stroke. this study is conducted to compare the high sensitive c-reactive protein (hs-crp) levels and the lipid profile parameters between stroke patients and control group and de...

Background & Aims: Adult neurogenesis occurs in the two main areas of the brain of most mammalian species in; sub ventricular zone, and the dentate gyrus of the hippocampus. Many factors such as 17-β estradiol affect neurogenesis in the hippocampus. The aim of this study was to investigate the effect of exogenous 17-β estradiol on neurogenesis in the ovariectomized (OVX) mice. Materials & Meth...

The precise assembly of neuronal circuits requires that the correct number of pre- and postsynaptic neurons form synaptic connections. Neuronal cell number is thus tightly controlled by cell death during development. Investigating the regulation of cell number in the retina we found an ATP gated mechanism of neuronal death control. By degrading endogenous extracellular ATP or blocking the P2X(7...