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Biomedical subjects

A Frigessi

Publications and source records attributed to A Frigessi.

3 recordsLinked to original sources

[Gastrointestinal endoscopy in children].

BACKGROUND: Abdominal pain and other gastrointestinal symptoms in children may be, but are not always due to disease. Endoscopy in general anaesthesia may be necessary in children with long-term symptoms from the gastrointestinal tract. MATERIAL AND METHODS: We present a retrospective study of all children under the age of 15 who underwent endoscopy at the Central Hospital in Akershus (SIA) in the period 1993-98. 254 gastro-, 123 colono- and 43 sigmoideoscopies were performed. A conclusive diagnosis was made following endoscopy. There were few complications to the endoscopies. RESULTS AND INTERPRETATION: Our results indicate a higher incidence of inflammatory bowel disease than in similar studies, but with the same relative rates. Celiac disease occurs at a rate similar to the Swedish epidemic in the 1980s.

Abdominal Pain↗

A stochastic model for neuronal bursting.

A new stochastic model for bursting of neuronal firing is proposed. It is based on stochastic diffusion and related to the first passage time problem. However, the model is not of renewal type. Its form and parameters are physiologically interpretable. Parametric and non-parametric inferential issues are discussed.

Action Potentials↗

A stochastic model for the membrane potential of a stimulated neuron.

We present a simple model describing the transition between the prefiring, firing and postfiring phases of a single neuron in a large neural net. Using typical values for the physiological parameters that enter the model, we find average interspike times that are close to those reported in experimental measurements.

Animals↗