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Biomedical subjects

W Geets

Publications and source records attributed to W Geets.

17 recordsLinked to original sources
PubMed1985

[Early EEG in 300 cerebral concussions].

The EEGs of 300 concussed patients were examined at the last 48 h after trauma; 166 were younger than 20 years old and 134 were between 20 and 40 years old. Amongst the youngest group 145 cases had a benign concussion with 24% alterations, and 21 cases had a mild concussion with 81% alterations. Amongst the oldest group, 93 cases had a benign concussion with 15% alterations and 41 cases had a mild concussion with 41% alterations. The mostly transient EEG abnormalities are slowing, focal abnormalities or generalized bursts. Slowing is the most frequent abnormality in the youngest and focal abnormalities are most frequently observed in the mild concussion group.

Adult↗
PubMed1983

[EEG and brain-stem evoked potentials in 125 recent concussions].

EEG and ipsi/contralateral BEPs have been recorded in 125 cases of concussion at most 48 h after the cerebral trauma. In 100 cases of minor concussion the temporary loss of consciousness lasted not more than 2 min. In 25 cases of mild concussion, the loss of consciousness lasted until their arrival at the hospital. In minor concussions an abnormal EEG was found in 17% of the cases and in mild concussions, in 56%. The abnormalities of the BEP, more often seen in mild concussions (60%) than in minor concussions (8%), are an increase of interpeak latencies or distorted responses with average to bad reproducibility. The results are discussed.

Adult↗
PubMed1975

[The language of the unconscious].

The concept of consciousness, separate from that of vigilance, can be defined as the immediate knowledge of motor-perceptual activities on the cognitive assimilation of the real duration. The linguistic theories distinguish in the language first of all linguistic competence, it is grouping of signs or linguistic knowledge of the group, which one can compare to phenomenon of automatism, and secondly the spoken language or linguistic performance, a creative individual and voluntary act. The observation of aphasics and of a certain partial temporal epileptics permits to dissociate these two forms of language. That of the consciousness linked to the immediate observation of the self by ones' self could only be the creative word. The unconscious listener, separated from real time, without real creative ability, could only be the "-echo-souvenir" of the conscient person.

Aged↗
PubMed1975

[Agnosic attacks with speech disorders and asymmetric EEG anomalies].

The semantic and semiological limits of aphasia and agnosia are imprecise: in the present paper, aphasia is defined as a disorder of the verbal abstract representation of the world of signified, while agnosia is defined as a semantic disorder of sensorial analysis. Three electro-clinical observations of aphasic-agnosic paroxisms with intricated speech disorders and disorders of sensorial identification are reported here. These paroxisms are associated with bilateral and asymetric EEG discharges. The reported observations raise the problem of the function of speech as regards somatic representation or the concept of body image.

Adolescent↗
PubMedDate not supplied

[Quantitative hyperpnea in EEG (author's transl)].

After summarizing the phenomena of respiratory physiology involved in the hyperpnea test, the author studies the quantitative relation between the drop in PECO2 (pressure of CO2 in expired air) and changes in the EEG during hyperpnea. Normal subjects are divided into two groups of a hundred (6 to 19 1/2 years of age; 20 to 59 1/2 years of age). The PECO2 at rest is higher among the young subjects than among the adults, and its decline during hyperpnea is sharper. Thus, children show discrete respiratory acidosis in comparison with adults. The EEG of normal adults is practically unchanged during hyperpnea whereas, in the young group, moderate changes in the profile were observed in 45 out of 100 cases (classified empirically as normal). The PECO2 reaches a lower level in subjects showing EEG changes than in those showing none. All the reported differences are statistically significant (p less than 0.01). The probability of hyperpnea modifying the EEG profile becomes progressively less with age, and may be related to the reduced production of CO2 in older subjects. Epileptic subjects (primary generalized epilepsy) produce more CO2 than normal subjects during the hyperpnea test. The statistical data reported in the study show the importance of the size of the drop in ventilatory CO2 in the determination of EEG changes. The rest of hyperpnea in EEG can therefore be validly interpreted only if capnographic variations are measured. A standard quantitative hyperpnea test of this type should be devised, with specification of the hypocapnia level to be achieved.

Adolescent↗
PubMedDate not supplied

EEG and brainstem abnormalities after cerebral concussion. Short term observations.

Four hundred patients (221 young, 179 adults) with a cerebral concussion (317 minor, 83 mild) were examined within 48 hours after blunt head injury. In mild concussions there is a threefold homogeneous increase in the different EEG and BEP abnormalities compared to minor concussions. In the younger group EEG abnormalities are far more frequent than BEP abnormalities. An early EEG and/or BEP could be more useful than an EEG and/or BEP in the reconvalescent phase. Follow-up studies will have to prove their value in determining the risk of later posttraumatic epilepsy.

Adolescent↗
PubMedDate not supplied

[Ipsi- and contralateral ascending cochlear pathways. The II-III interval of the early auditory evoked potential].

Waves II to V of the early acoustic evoked potential present significant differences in ipsi- and contralateral derivations. The difference is more distinct for the IIN-III interval during which an ipsi-/contralateral phase-lag is apparent. Assuming, along with most authors, that the II-III interval represents mainly the cochlear nucleus--trapezoid body--superior olivary nucleus path, the ipsi-contra asymmetry suggests either morphological and/or functional asymmetry of the paths corresponding to the interval. It seemed to us to be a criterion of normal retro-cochlear.

Adolescent↗
PubMedDate not supplied

[Long-term follow-up of epileptic fits in children. Influence of an early treatment (author's transl)].

The prognosis of epileptic seizures occurring before the age of 15, was evaluated in 100 cases during 10 years after their first seizure. All of them were subjected to antiepileptic treatment at least during nine years and after two seizures or more. Treatment was precocious in certain cases beginning during the first year after the first seizure, delayed several years in other cases. By 32 patients the seizures persisted and 26 patients were seizure-free for 9 years. The electroclinical forms of the first epileptic seizures occurring before the age of 15, are comparable whatever further benign or chronic evolution may be. The RPE are however more frequent in the benign cases. Between the two groups there is a statistically significant difference in the delay of treatment setting up after the first seizure: on average 1 year in benign cases and 3 years in chronic cases.

Adolescent↗
PubMedDate not supplied

[Epileptic headaches (author's transl)].

The author describes three observations characterized by the following similar features: 1. Children, between 2 and 9 years, suffering from attacks of sterotyped headaches. 2. EEG with bursts of high- voltage paroxysmal discharges, mainly during hyperventilation. 3. Efficiency of antiepileptic drugs contrary to antimigrainous treatment. These headaches are considered by the author as "epileptic", and this diagnosis is discussed.

Child↗