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Biomedical subjects

D Samson-Dollfus

Publications and source records attributed to D Samson-Dollfus.

85 records · Page 5Linked to original sources
PubMedDate not supplied

[Normal children sleep E.E.Gs from 5 months to 3 years old (author's transl)].

The sleep E.E.G. of the child under 3 years old is characteristic from several points of view: Drowsiness: The hypersynchrony is always observed. It is more continuous in younger children, than in the older one, where only bursts of hypersynchrony are seen. The fast rhythms of low amplitude may exist, during stage 2 sleep, but they are rare. Calm Sleep (C.S.): The vertex humps are more and more acute and sharper from 18 months. The sleep spindles are of high amplitude and frequent at 6 and 8 months. They diminish later. It may be for that reason that III and IV sleep stages seem to be more important after 12 months than before. From 21 months, we have observed an unusual pattern during C.S.: rhythmic and diffuse thêta rhythms of about 6 c/s. Paradoxal sleep (P.S.): If it is possible to observe P.S. during day-naps 8 or 9 months, it is rare later and for recording P.S., it is necessary to record E.E.G.s at night. The E.E.Gs are either a little like stage I E.E.G, or consistent of high and monomorphic delta waves. If it is possible to observe at least 3 complete sleep cycles, the proportion of P.S. is about 20 p. 100 of the total length of the sleep. At least, it is very important, even in medical practice, to record not only E.E.G. but also polygraphic leads: breathing, electro-myogram, electrocardiogram, and to notice also the rapid eyes movements.

Age Factors↗
PubMedDate not supplied

[A genetic study of familial epilepsy (author's transl)].

The authors studied 3 generations of a family in which 4 members presented with classical grand mal epilepsy. The propositus and all his descendents were examined clinically and electroencephalographically. 19 markers were tested. The EEG criteria used are discussed. A relation between the different markers and the clinical and EEG presentation was studied using Morton's scores.

Adolescent↗
PubMedDate not supplied

[Electrophysiological observations on seizure activity provoked by an intracarotid injection of Naftidrofuryl (author's transl)].

Three seconds after 0.08 g of Naftidrofuryl administered through the right carotid artery during an operation for carotid stenosis a right temporal sharp wave discharge occurred followed by diffuse polyspike activity occurring every 3to4 seconds with concomitant myoclonus. Rare episodes of this type are recorded in the literature when it has been used in neuroradiology. The authors state this agent should be forbidden by intracarotid injection.

Carotid Artery Diseases↗
PubMedDate not supplied

[Digital computer analysis of the electromyogram: preliminary report (author's transl)].

This is a preliminary report of a method of digital computer analysis of the electromyogram recorded from twenty sites in biceps brachial during fixed voluntary effort. The method allows several EMG parameters to be studied. The results in a group of normal subjects have been compared with those in patients with neuromuscular disease. Three parameters have proved of value in differentiating normal subjects from those with neurogenic disease.

Adult↗
PubMedDate not supplied

[EEG sleep patterns in post-traumatic coma (author's transl)].

EEG sleep patterns were observed in 44 cases of cranial injuries examined within 24 hours of the traumatic incident. Young people were involved, as more than half of these cases were noted in patients under 15 years of age. Two main types of tracing were observed: EEG sleep pattern with slow waves were seen mainly in children; but sleep patterns of low amplitude appeared generally in adolescents and adults. There was usually a favourable outcome in this series, as there was only one death the day after the accident, in a pateint with multiple injuries and only two cases of post-traumatic epilepsy.

Adolescent↗
PubMedDate not supplied

[First results given by a sleep automatic analysis for 2- to 12-months-old infants (author's transl)].

A sleep automatic analysis program was performed for infants older than 2 months. It used spectral analysis of the EEG and polygraphic parameters. Three EEG parameters and three polygraphic parameters are considered to be sufficient to stage babies' sleep with computers. Automatic detection was satisfactory for babies older than 4 1/2 months: agreement was better than 0.8 between automatic and human observation. Results are less satisfactory for the younger infants where there is only between .50 and .60 agreement between machine and human observers. These preliminary results confirm that decision criteria must be age related.

Age Factors↗
PubMedDate not supplied

[Spectral analysis of normal subjects and cardiac patients in relation to the age (author's transl)].

A statistical study has been performed on E.E.G. spectral analysis of control subjects and cardiac patients. This work has confirmed that the cerebral activity was slightly different in relation to the age. These modifications concern alpha frequencies, and also delta, thêta and bêta energies. In cardiac patients, these changes occurred earlier than in control subjects, but the evolution is different in relation to the pathology.

Adult↗