BACKGROUND Videocapillaroscopy (VCP) can be used to explore microcirculatory modifications in skin diseases. Psoriasis shows specific capillary alterations reflecting typical histopathological changes. OBJECTIVE To compare capillary morphology, distribution and density in psoriasis and seborrheic dermatitis of the scalp for differential diagnosis. METHODS VCP was performed on histology-conf...

Rational development of transcranial current stimulation (tCS) requires solving the 'forward problem': the computation of the electric field distribution in the head resulting from the application of scalp currents. Derivation of forward models has represented a major effort in brain stimulation research, with model complexity ranging from spherical shells to individualized head models based on...

motor vehicle and falling down are responsible for the most number of traumatic injuries. this study aimed to compare the characteristics of traumatic brain injury among accident and falling down cases. in this analytical cross- sectional study, data were collected from the records of cadavers who died due to accident or falling down and referred to kahrizak dissection hall, tehran forensic med...

eccrine porocarcinoma is a rare malignant adnexal tumor of ductal portion of eccrine sweat gland. it occurs commonly in the lower extremities and rarely in scalp, face, ear, trunk and upper extremities. this survey presents a classic case of eccrine porocarcinoma of scalp in a 58 yr old male patient, presenting as cauliflower like growth over parietal aspect of scalp.

Background and Objective: Neurofibromas occur as solitary and multiple forms. The solitary ones are extraneural and more common, histologically exhibiting spindle cells with wavy nuclei, scattered among collagen fibers. Multiple neurofibromas are seen in neurofibromatosis (types I and II), including intr...

Directing spatial attention or manual response selection by means of arrow cues elicits a characteristic sequence of lateralized ERP components. Van Velzen and Eimer (2003) proposed that one of these components, the EDAN (early directing-attention negativity) is not related to the control of spatial attention but is instead an N2pc in disguise, related to the visual processing of arrow cues. Wh...

OBJECTIVE During transcranial electrical stimulation, current passage across the scalp generates voltage across the scalp surface. The goal was to characterize these scalp voltages for the purpose of validating subject-specific finite element method (FEM) models of current flow. APPROACH Using a recording electrode array, we mapped skin voltages resulting from low-intensity transcranial elect...