نتایج جستجو برای: brain cortex
تعداد نتایج: 570942 فیلتر نتایج به سال:
Introduction: The lack of social communication is associated with the primary risk of proper brain functions. It is reported that crocin helps relieve this problem. The present study examined the protective effect of two doses of crocin on Long-term potentiation (LTP) of hippocampal cornu ammonis 1 (CA1) area as a cellular mechanism in rats exposed to chronic social isolated stress. Methods: R...
Abstract This paper presents results from a design neurocognition study on the effect of gender EEG frequency band power when performing constrained and open design. We used electroencephalography to measure brain activity 84 professional designers. investigated differences in associated with 38 female 46 male designers, while two prototypical tasks. The aim was explore whether moderates versus...
Abstract In this paper, we present results from an experiment using EEG to measure brain activity and explore frequency power associated with gender differences of professional industrial designers while performing two prototypical stages constrained open design tasks, problem-solving sketching. Results indicate no main effect gender. However, among other effects, a consistent hemisphere for th...
A 70-year-old man presented with slow gait and a clumsy hand on the right side. Neurological examination revealed dystonia ideomotor apraxia in hand. mask-like face, rigidity arm, shuffling were noticed. Treatment L-dopa had no effect. He was clinically diagnosed corticobasal syndrome (CBS). Susceptibility-weighted images of brain magnetic resonance imaging showed low-intensity areas surface ce...
We investigated the neural basis of newly learned words in Spanish as a mother tongue (L1) and English second language (L2). Participants acquired new names for real but unfamiliar concepts both languages over course two days. On day 3, they completed semantic categorization task during fMRI scanning. The results revealed largely overlapping brain regions English. However, showed heightened BOL...
Motor evoked potentials (MEPs) elicited by transcranial magnetic stimulation (TMS) of the primary motor cortex (M1) are highly variable, reflecting physiological fluctuations in corticospinal excitability. Besides changes coil 3D-orientation, MEP variability also depends on several factors related to state stimulated [1,2]. Another factor, poorly investigated so far, is physical brain displacem...
introduction: neurons in layer ii and iii of the somatosensory cortex in rats show high frequency (33 ± 13 hz) of miniature excitatory postsynaptic currents (mepscs) that their rates and amplitudes are independent of sodium channels. there are some changes in these currents in neurodegenerative and psychological disorders. regarding to well known roles of the neuromodulatory brain systems in th...
In this study, the effect of topiramate, as an antiepileptic drug, was evaluated on morphine craving in rats. The conditioned place preference (CPP) test was used for this purpose. Repeated administration of morphine (10 mg/kg, i.p. for 4 days) induced significant CPP. Administration of topiramate (50 and 100 mg/kg, i.p. for 4 days) with each morphine administration decreased the acquisition of...
Neural precursors generate neurons in the embryonic brain and restricted niches of adult a process called neurogenesis. The precise control cell proliferation differentiation time space required for neurogenesis depends on sophisticated orchestration gene transcription neural precursor cells. Much progress has been made understanding transcriptional regulation neurogenesis, which relies dose- c...
In this research connectionist modeling of decision making has been presented. Important areas for decision making in the brain are thalamus, prefrontal cortex and Amygdala. Connectionist modeling with 3 parts representative for these 3 areas is made based the result of Iowa Gambling Task. In many researches Iowa Gambling Task is used to study emotional decision making. In these kind of decisio...
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