background and aims: there are different causes for brain death including head trauma, cerebrovascular accidents and intracranial space-occupying lesions. the present study was aimed to determine the causes of brain death in chahar mahal and bakhtiari province due to high turnover of trauma in this area during 2003 to 2013. methods: this study was based on routine data and was conducted on all ...

background : studies have emphasized on the frontal eeg  symmetry as a mediator of emotional states. this research was aimed to examine the overall and asymmetric activities of the brain lobes under the affective states. methods : a coupling eeg was recorded in an eye closed awakened condition from 40 right handed female students under the baseline and affective states. results : bilaterally de...

Estimation of intracranial stress distribution caused by mass effect is critical to the management of hemorrhagic stroke or brain tumor patients, who may suffer severe secondary brain injury from brain tissue compression. Coupling with physiological parameters that are readily available using MRI, eg, tissue perfusion, a non-invasive, quantitative and regional estimation of intracranial stress ...

Split-brain cats using a single hemisphere show impaired performance on a variety of behavioral tasks. This has been attributed to a loss of cortical mass action. To test this proposal in primates, performance on a nested match-to-sample task was compared in split-brain, hemispherectomized, and normal monkeys. As expected, split-brain monkeys using a single hemisphere performed worse than norma...

Streptococcus intermedius is a Gram-positive commensal of the oral cavity with tendency to cause brain and liver abscesses. Mediastinal involvement from S. intermedius is very rare. We present a case of 22-year-old male with newly detected mediastinal conglomerate nodal mass. On his way for bronchoscopy, he developed seizures and was found to have three brain lesions. The aspirate from brain bi...

Though most primary brain gliomas present as a single mass lesion in the brain, this potential diagnosis must be considered in the differential diagnosis when faced with a case of multifocal brain mass lesions. Among the most common brain tumors in humans, glioblastomas can be classified into four classes, one of which consists of anaplastic astrocytomas (AA). Due to its significant malignant p...

Impact induced traumatic brain injury (ITBI) describes brain injury from head impact not necessarily accompanied by skull fracture. For sufficiently abrupt head impact decelerations, ITBI results from brain tissue stress incurred as the brain crashes into the inside of the skull wall, displacing the surrounding cerebral spinal fluid (CSF). Proper helmet cushioning can damp the impact force and ...