abstract background cerebral neoplasm arises from brain, spinal cord and meningeal cells. not only malignant cerebral neoplasm also benign tumor could lead to death due to mass effect on vital structures. access to these tumors is difficult, and mri and ct scan could be helpful in determining anatomical location of tumors and distinction of malignant from benign. objective for better and earlie...

A meta-analysis of the literature shows that in adult male songbirds, brain mass, telencephalon volume and n. rotundus (a thalamic visual nucleus) volume increase from the nonbreeding season (low testosterone) to the breeding season (higher testosterone). These effects can at least partially be mimicked by photoperiod manipulations in captivity. In contrast, an artificial testosterone (T) titer...

chimpanzee, 34–35 weeks) [4], human neonates do have larger brains than chimpanzee neonates [2]. It has been suggested that the extraordinary brain enlargement in humans is due to unique features in the human pattern of brain development during both the prenatal and postnatal periods [1,2]. It has been argued that all primates conform to a 12% ratio of brain mass to body mass from the fetal per...

in this study, 22 patients (15-75 years old) were selected and transferred to ct scan for tumor ablation. for ablations, after prep and drep under the local anesthesia and mild sedation in proper position, small incision made and special needle inserted and guided by proper direction to the core of the tumor. then, laser probe inserted through the needle and laser energy delivered. although we ...

Genetic adaptation and phenotypic plasticity are two ways in which organisms can adapt to local environmental conditions. We examined genetic and plastic variation in gill and brain size among swamp (low oxygen; hypoxic) and river (normal oxygen; normoxic) populations of an African cichlid fish, Pseudocrenilabrus multicolor victoriae. Larger gills and smaller brains should be advantageous when ...

formula one legend michael schumacher hit his head severely while skiing on december 29, 2013. he was operated on for brain decompression and left in a coma fighting for life. in such severe brain injury with cerebral contusion and hemorrhage following head trauma, refractory to medical therapy and with increasing cerebral oedema and intracranial pressure, critically low cerebral perfusion can ...

objectives the aim of this study was to present the incidence and characteristics of repeated tbi (rtbi) in iranian patients. patients and methods during one year, all admitted tbi patients with prior tbi history were enrolled into the study. in each patient, data such as age, gender, past medical history, injury cause, anatomic site of injury, tbi severity, clinical findings and ct scan findin...

background traumatic brain injury (tbi) is a worldwide problem, especially in countries with high incidences of road traffic accidents such as iran. patients with a single occurrence of tbi have been shown to be at increased risk to future tbi. this study presents incidences and characteristics of repeated traumatic brain injury (rtbi) in iran. materials and methods during one year, all admitte...

Despite recent efforts to understand blast effects on the human brain, there are still no widely accepted injury criteria for humans. Recent animal studies have resulted in important advances in the understanding of brain injury due to intense dynamic loads. However, the applicability of animal brain injury results to humans remains uncertain. Here, we use advanced computational models to deriv...