A 4-year-old boy had slight retardation of psychomotor development and a history of three febrile convulsions. He had been in good health until a generalized seizure occurred. On the day of admission, he was in status epilepticus, but the seizures were controlled by administration of diazepam and phenobarbital. CT of the brain showed no abnormality. The day after admission, the patient was aler...

The visibility of a target improves when the target is presented simultaneously or with a delay between two collinear flankers. Here we tested the temporal properties of lateral facilitation by manipulating the timing of both onsets and offsets of the target and flankers. The results show that lateral facilitation critically depends on the order of presentation of the target and flankers. A typ...

We recently demonstrated that automatic attention favors the right side of space and, in the present study, we investigated whether voluntary attention also favors this side. Six reaction time experiments were conducted. In each experiment, 12 new 18-25-year-old male right-handed individuals were tested. In Experiments 1, 2, 3 (a, b) and 4 (a, b), tasks with increasing attentional demands were ...

Final remarks Pollinator-limitation and resource constraints results in only a small proportion of an orchid population giving rise to the subsequent generation. This is further limited, as most orchid populations, particularly in the tropics, are small, due to the fluid nature of the niches they occupy and the availability of mycorrhiza ‘islands’. This combined with low reproductive success re...

The first case of agenesis of the corpus callosum was reported by Reil in 1812. Eighty-two cases, in which the condition was encountered incidentally at necropsy, were collected from the literature up to 1933 by Baker and Graves. Despite the introduction of pneumo-encephalography by Dandy in 1918 it was not until 1934 that Davidoff and Dyke established its value in the diagnosis of agenesis of ...

Twenty-four-year-old woman without familiar detected signs of Bourneville's disease or tuberous sclerosis complex (TSC) was diagnosed with this disease by casual discovery on cerebral magnetic resonance imaging (MRI) of an intraventricular tumor, after symptoms consist in headache, equilibrium disturbances, and progressive loss of vision. MRI shows an intracranial mass, 33÷24÷30 mm in size, loc...

BACKGROUND AND PURPOSE Differentiation of normal pressure hydrocephalus (NPH) from other types of dementia and the selection of appropriate candidates for shunt surgery remain a clinical challenge. The aims of this study were to assess the efficacy of cerebral metabolites depicted by proton chemical shift imaging (1H-CSI) in distinguishing NPH from other dementias and to examine the relationshi...

Large cerebral ventricles are a frequent finding in brains of dogs with brachycephalic skull conformation, in comparison with mesaticephalic dogs. It remains unclear whether oversized ventricles represent a normal variant or a pathological condition in brachycephalic dogs. There is a distinct relationship between white matter and grey matter in the cerebrum of all eutherian mammals. The aim of ...