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Biomedical subjects

A Gouaze

Publications and source records attributed to A Gouaze.

At least 19 recordsLinked to original sources
PubMed1991

Extracerebral course of the perforating branches of the anterior communicating artery: microsurgical anatomical study.

Damage to the perforating branches arising from the anterior communicating artery, because of their blood supply to the septal nuclei and anterior hypothalamus, explains the memory impairment and the electrolyte disturbances that often follow the surgery of aneurysms located in this part of the circle of Willis. The microsurgical anatomy of these branches was studied on 60 fixed human brains, with special attention to their number, caliber, and vascular territory. The direction of the branches was evaluated, measuring the angle formed by them with the postcommunicating segment of the anterior cerebral artery. The variability of this anatomical region is discussed in light of the literature.

Cerebral Arteries↗
PubMed1990

Microsurgical anatomy of the cisternal course of the perforating branches of the posterior communicating artery.

Both the perforating branches--especially the extracerebral segments--and the arachnoidal anatomy at the level of the posterior communicating artery were studied in 60 human brains previously fixed in formalin. The close relationships between this artery and the oculomotor nerve are described, and it is noted that each of them is enclosed in its own arachnoidal compartment, which in the case of the posterior communicating artery is to be distinguished from the interpeduncular cistern. The latter cistern was found to contain only the terminal segments of the posterior communicating artery. The hypothalamic branches were within the inner wall of the arachnoidal cistern surrounding the posterior communicating artery. The variations in diameter of this artery are explained by its embryological development and are not related to the number and the diameter of the perforators. The posterior communicating artery was absent at times. The surgical implications of such a variable anatomical arrangement are discussed in the light of the literature.

Brain↗
PubMed1990

Perforating branches of the basilar bifurcation.

The perforating branches of the upper basilar artery and of the first (P1) segment of the posterior cerebral artery were studied in 50 fixed brains obtained from human cadavers. No vertical branches arose from the basilar bifurcation. The upper basilar artery gave rise to horizontal branches, which were studied with reference to their angle of origin. Perforating arteries arising from P1 segments were found in all specimens. Rare branches were found to come from the inferior and anterior surfaces of P1 segments. The anatomical patterns of these branches are discussed in the light of previous reports. Preoperative knowledge of some anatomical aspects (the position of the basilar apex, the angle between the right P1 and left P1 segments, and relationships to the dorsum sellae and the mammillary bodies) can help in the selection of a neurosurgical approach and may improve the operative results in the surgical treatment of basilar apex aneurysms.

Basilar Artery↗
PubMed1990

[Micro-anatomy of collateral perforating branches of the middle cerebral artery].

The lenticulostriate arteries are the subject of a microanatomical study on 50 formalin fixed human brains. A single trunk arising from the middle cerebral artery is rarely found. In fact the branches are numerous and they are found to ramify before penetrating the anterior perforated substance. The length of the sphenoidal segment is variable and this aspect is discussed in the light of the literature data. The origin of the perforating branches is spread from the internal carotid artery to the bifurcation branches of the middle cerebral artery (M2 segment). On the other hand lenticulostriate arteries arising from the cortical branches of the middle cerebral artery are often found. These anatomical patterns are of essentially surgical interest. No branches must be damaged during the opening of the Sylvian fissure or during the dissection of an aneurysm in this region.

Cadaver↗
PubMed1989

Cerebellar hemangioblastoma and primary hyperparathyroidism.

The authors report the case of a 52-year-old woman presenting with cerebellar hemangioblastoma and primary hyperparathyroidism. It is the second reported case involving this new association. The relationship between these two tumors is discussed.

Cerebellar Neoplasms↗
PubMed1986

[Outcome of intracranial meningioma in adults. Retrospective study of a medicosurgical series of 161 meningiomas].

The authors report the retrospective study of a medico-surgical series of 161 patients with intracranial meningiomas, diagnosed over a period of 9 years, with a follow-up period varying from 18 months to 9 years. Out of 185 cases studied, 24 were excluded because information or perspective were inadequate. Of the 161 cases retained, 133 (82.6%) were given surgical treatment and 28 (17.4%) were given conservative treatment because the clinical state was poor or the location was deemed inoperable. The sex ratio was 3 women to 1 man. The average age was 58 years. The most frequent locations were the convexity (27.9%) and the sphenoid ridge (24.7%). Among the clinical signs, apart from the usual general seizures or pyramidal signs should be noted the importance of psychological disorders. The operative mortality rate was 14.3% with a very high peak in the sixth decade, reaching 27%, while it was only 9% in the seventh decade and 13% in those over seventy. The internal sphenoid ridge location had a mortality rate of 31.5%, which is significantly higher than for all the other locations. Quality of survival was identical for all age groups. Complications were mainly seizures, functional deficits and psychological disorders. Recurrences were relatively few (10%), but insufficient lapse of time and the presence of only one malignant meningioma explain the lowness of this figure. The use of scanner was not determinant in our series, neither on the earliness of diagnosis, nor on prognosis, comparison of figures before and since scanning showing no significant differences.

Adult↗
PubMed1984

[Ocular flutter: really a cerebellar sign?].

Two post-operative cases of ocular flutter with electro-oculographic recordings are reported. In both cases, the lesion was unique and restricted, suggesting that a cerebellar damage was responsible for this abnormal eye movement. In both cases, ocular flutter was directed toward the healthy side. Therefore it is suggested that flutter may result from a focal cerebellar lesion and in that case be an oriented eye movement.

Adolescent↗
PubMed1982

[Meningeal hemorrhage disclosed by the initiation of Prinzmetal's angina].

The association of a cardiac disturbance and a subarachnoïd hemorrhage is well known but the cardiac signs seldom look the most important. When studying a case which was very particular because the cardiac signs consisted in a Prinzmetal's variant angina, it finality appears that the Prinzmetal's angina is not so rare as could be thought in such circumstances. Therefore a neurological pathology hidden by a cardiac one has been rarely reported such as it was seen in that case. In the literature, the influence of the parasympathetic and especially the sympathetic nervous system is emphasized as a probable cause of the most frequent cardiac abnormalities. All the authors think the medical cardiac treatment and the surgical treatment of the subarachnoïd hemorrhage have to be done at once.

Angina Pectoris, Variant↗
PubMed1979

[Primary intra-cerebral hemorrhage in the new born, nursling and child (author's transl)].

The authors report 6 cases of intracerebral hemorrhages in 6 children, of what appears to be, of primary origin. 3 cases concern children between the ages of 4 and 14 years; the 3 others are situated shortly after birth or during the first months of life. A review of the literature emphasizes the sporadic nature of these cases and the persistance of diagnostic and etiological problems as to the cause of these hemorrhages. In the course of reviewing articles as well as our own personal series, it is evident that the cat scanner has demonstrated its qualifications as a diagnostic tool in the early detection of the lesions, permitting a better adapted treatment, thus improving their prognosis. The prognosis appears to be linked : --to an early diagnosis --to whether or not the hemorrhage is of massive nature or not --to the precise location of the hematoma --to the neurological state of the patient at the time of treatment --to the absence of an associated pathologie (severe prematurity, coagulation pathology). The long distance prognosis in the case of these apparently primary hemorrhages remains uncertain, due to the high rate of recidivism at a later unpredictable date (one month or several years later); to the occurence or not of a hydrocephalus especially in the case of young infants; and frequent sequels affecting superior functions. This long distance prognosis seems, however, to be little affected by the recent acquisitions in diagnostic testing.

Adolescent↗
PubMed1978

[Radicular artery thrombosis after cervical anterior approach for cervico-brachial neuralgia (author's transl)].

An anterior cervical approach completed by a bone graft is performed on a man suffering from cervico brachial neuralgia which did not improve by medical treatment and rest. During four months, the post operative course is excellent, with complete disappearance of pain and regression of the pre-existing neurological deficit. At the end of this period, the appearance of a major deficit within the field of the concerned root led to a selective brachial angiogram which revealed the existence of a radicular artery thrombosis.

Angiography↗