Neuroimaging research indicates that human intellectual ability is associated to brain structure including the thickness of the cerebral cortex. Most studies show that general intelligence is positively associated with cortical thickness in areas of association cortex allocated throughout both brain hemispheres. Changes in cortical thickness over time have been related to intelligence, but whet...

background: alzheimer’s disease (ad) is a neurodegenerative disorder with progressive loss of cognitive abilities and memory loss. the aim of this study was to compare neuropathological changes in hippocampus and brain cortex in a rat model of ad. methods: adult male albino wistar rats (weighing 250-300 g) were used for behavioral and histopathological studies. the rats were randomly assigned t...

the short and long term effects of chromium toxicity on brain catecholamines and acetylcholinesterase levels were investigated. rats were injected daily with varying amounts of chromium. the short term (2 h) administration of chromium (8 mmol/kg) reduced catecholamines level of cerebellum, mid-brain and brain-cortex by 22.8, 19.4 and 21.2% respectively. acetylcholinesterase activity was also re...

this study was conducted to evaluate the effect of soy milk on serum 17- β estradiol level and number of neurons in cerebral cortex and hippocampus as well as determination of the ratio of neurons in cortical and hippocampal regions in neonatal ovariectomized rats. thirty female rats (one day old) were divided into six groups of five. at day 7, ovariectomy surgery was performed in four groups a...

there are some conflicts about constancy of conduction velocity (cv) in a given tract of nervous system. by recording excitatory postsynaptic currents (epsc) in layer iv of the somatosensory cortex we tried to clear changes in cv of thalamocortical tract of mice aged 3 to 50 days old. field potentials and epsc were recorded in the layer iv by stimulation of ventrobasal nucleus of thalamus (vb) ...

background inferior turbinate hypertrophy (ith) is one of the common causes of nasal obstruction. in some case with ith due to allergic rhinitis medical therapy can be useful and in cases with refractory ith surgical techniques may be helpful. although there is no excellence [or superiority] among these surgical methods, radiofrequency (rf) has recently become popular. objectives this study com...

objective: osteoporosis is the most common metabolic disease of the bone decreasing bone mineral density (bmd) particularly in postmenopausal women. on the other hand, panoramic radiography has several applications in dentistry. it appears that by calculating some indices on panoramic radiographs, we may be able to predict the risk of osteoporosis in high-risk individuals. the present study was...

introduction: considering the anticonvulsant effects of a1 adenosine receptors and the anatomical connections between pjriform cortex and amygdala, in this study, the role of a1 adenosine receptors activity of piriform cortex neurons on amygdala kindled seizures was investigated in rats. material and methods: the rats were fully kindled by daily electrical stimulation of amygdala. n6-cyclohexyl...