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Biomedical subjects

M Masson

Publications and source records attributed to M Masson.

At least 109 records · Page 6Linked to original sources
PubMed1986

Infarction in the territory of the anterior choroidal artery. A clinical and computerized tomographic study of 16 cases.

Sixteen cases of the anterior choroidal artery syndrome are reported. In its completed form, this rare syndrome combines the triad of hemiplegia, hemianaesthesia, and homonymous hemianopia. CT examination confirms the diagnosis by revealing an area of reduced density situated in the posterior limb of the internal capsule, sparing the thalamus medially and encroaching upon the tip of the globus pallidus laterally, and corresponding to the distribution of the anterior choroidal artery. Incomplete forms of the syndrome are more frequent. Left-sided spatial neglect may accompany right-sided lesions, as may slight disorders of speech in left-sided lesions. Clinical-anatomical correlations are discussed.

Adult↗
PubMed1986

Biochemical markers in the assessment of protein-calorie malnutrition in premature neonates.

We studied 135 premature newborns of 26 to 36 weeks gestation, divided into three groups: the control group, 66 premature infants with uncomplicated course; 51 premature neonates with appropriate birth weight for gestational age (AGA), who suffered from clinical problems that delayed oral feeding; and 18 premature infants with small birth weight for gestational age (SGA). When neonates of the same postnatal age were compared, prealbumin concentrations were the lowest in the SGA group at the third and fourth postnatal week. Although the AGA group had the most infants with serious illnesses and the lowest protein-calorie intakes, their prealbumin concentrations did not differ significantly from those of the control group. But when the infants of each group were subdivided on the basis of intakes and weight gain regardless of postnatal age, those with greater intakes showed significantly higher prealbumin values; however, in all groups, the infants with higher intakes were also significantly older. Total proteins and albumin showed similar changes in all groups. Prealbumin concentrations showed great interindividual variability in infants of the same postnatal age. We conclude that prealbumin, albumin, and serum total proteins are not sufficiently sensitive biochemical markers to assess alterations of the nutritional status of premature infants.

Anthropometry↗
PubMed1986

[Macrosaccadic oscillations symptomatic of cerebellar hemorrhage].

Electro-oculographic recordings in a patient with an oculomotor disorder due to hemorrhage of the vermis showed macrosaccadic oscillations. Data from reported cases suggest the specific significance of this type of disorder for acute cerebellar lesions.

Acute Disease↗
PubMed1986

[Thalamic neglect].

Thalamic lesions can provoke negligence behavior with various, sometimes dissociated manifestations: motor negligence or reduction in use of one half of the body whatever the direction of the gesture or the half-space in which it occurs; extinction phenomena demonstrated without difficulty for visual, somatesthetic and auditory modalities; spatial negligence involving attentional and intentional components, often difficult to distinguish. Negligence of this type is mainly the result of right sided lesions, with several non-exclusive explanations: natural predominance of the left hemisphere, activating role of language with respect to the left hemisphere, capacity of the right hemisphere to be "attentive" to bath half-spaces in contrast to the left hemisphere, attentive to the right half-space only.

Aged↗
PubMed1986

[Intraventricular hemorrhage after carotid endarterectomy. Role of moyamoya-type collateral circulation].

Stenotic lesions of the cervical arteries due to atherosclerosis or irradiation may provoke the development of a Moya-Moya type collateral network. Rupture of a vessel participating in this collateral circulation may be the cause of a hemorrhagic accident. The hemorrhage may be subarachnoid, intracerebral or more usually intraventricular. Intraventricular hemorrhage occurred in a patient who had developed a Moya-Moya type collateral circulation secondary to atherosclerotic stenosis of a carotid artery. The hemorrhagic incident occurred during carotid endarterectomy, suggesting a predisposing role for hemodynamic modifications resulting from the operation.

Carotid Artery Diseases↗
PubMed1986

[Isolated sensory deficit of 1 side of the body as a result of a hematoma of the pons].

In a patient with a history of sudden onset of an isolated sensory syndrome of the right side of the body the sensory deficit was exclusively related to lemniscal sensitivity. NMR imaging showed a small hemorrhage in the left paramedian portion of the pontine tegmentum, corresponding precisely to the location of the median lemniscus.

Afferent Pathways↗
PubMed1985

[The anterior choroidal artery syndrome].

The anterior choroidal artery syndrome is extremely rare. When complete, it includes hemiplegia, hemianaesthesia and homonymous lateral hemianopsia. The diagnosis is provided by computerized tomography which shows a low-density area located in the posterior part of the posterior limb of the internal capsule, sparing the thalamus medially but involving the tip of the pallidum externally and corresponding to the territory of the anterior choroidal artery. Incomplete forms of the syndrome have been described. The syndrome may also be associated with neuropsychological disorders, including left neglect syndrome in right-sided lesions and disorders of speech in left-sided lesions. The anatomico-clinical correlations are discussed.

Arteries↗
PubMed1985

Occurrence and coexistence in Nereis diversicolor O.F. Müller (Annelida Polychaeta) of substances immunologically related to vertebrate neuropeptides.

Numerous immunochemical and immunohistochemical studies have shown a wide distribution of several families of neuropeptides in invertebrates as well as vertebrates. There are relatively few data available for Annelida: Polychaeta. Therefore, we undertook an immunohistochemical investigation in the marine worm Nereis. Among the vertebrate type antibodies tested, those against met-enkephalin, LH-RH, vasopressin, oxytocin and ACTH had negative or only very slight effects. Slight to moderate reactions were obtained for VIP, SRIF, CRF, GRF, and leu-enkephalin. Moderate to very strong responses were found with anti-CCK/gastrin, -substance P, and -beta-MSH sera. Immunopositive reactions were usually observed in the entire CNS (except, until now, in neurosecretory cells, type II, in nuclei 20, and in nerve fibres located in the infracerebral neurohemal area). The immunoreactivity was, however, more or less abundant according to different CNS regions. For example, it appeared that the immunostaining for CRF is more important in the VNC while the leu-enkephalin family is more abundant in the brain (particularly in fuchsinophilic neurosecretory cells, type I, in nuclei 20). Moreover, several vertebrate type peptides (such as CRF/GRF and CCK/gastrin) may coexist in a single neurone. Several antisera may elicit a positive reaction in some specific area (for example, substance P in the nuchal organ; SRIF in oocytes; CCK/gastrin in the gastrointestinal tract). Nothing is known about the role of the different substances immunologically detected in Nereis. It is suggested that CCK/gastrin-, beta-MSH- and substance P-like materials transmit external stimuli to neurosecretory centres located in the caudal part of the brain.

Animals↗
PubMed1985

[Right neglect with hemiasomatognosia, mental confusion, apraxia and agraphia without aphasia].

A 74 year-old woman was admitted with a right hemiplegia resulting from a left infarct that had totally destroyed the territory supplied by the middle and anterior cerebral arteries. The patient presented with anosognosia and hemiasomatognosia and negligence of the right half-field. She was aprosodic, not aphasic, and there was a severe apraxia and total agraphia. These neuropsychological disorders are discussed in relation to the contradictory data relative to the manual lateralization of the patient. Findings in this case of a "crossed apraxia" show that management of language and of the propositional gestures are not necessarily ensured by the same hemisphere. It also appears that manual preference may be a poor clue for interpretation in terms of functional lateralization.

Aged↗
PubMed1985

[Lead encephalopathy with thrombosis of the superior longitudinal sinus].

A 32 year old obese, diabetic and hypertensive woman presented with signs of increasing intracranial pressure: diplopia, partial lateralised Jacksonian seizures followed by alternating post-ictal hemiplegia. She was also anaemic. Investigation revealed lead poisoning and thrombosis of the superior sagittal sinus. She recovered rapidly with heparin and calcium EDTA therapy, except for persistent optic atrophy due to the papilloedema. The authors discuss the relation of lead encephalopathy and dural sinus thrombosis, and the contribution of each condition to this patient's clinical symptoms.

Adult↗
PubMed1985

[Frontal syndrome of progressive supranuclear palsy].

Neuropsychological findings in 10 clinical cases of progressive supranuclear palsy are presented. Patients were aged 52 to 80 and the duration of their illness was 1 to 5 years. Severe psychological disturbances e.g. depression or outbursts of irritability were prominent features in 5 patients. Formal neuropsychological testing disclosed mental slowing, impaired attention, reduced verbal fluency and elaborated linguistic abilities, poor abstract thinking and reasoning, mild to moderate memory loss, dynamic apraxia, grasping, motor impersistence, imitation and utilization behaviour. The clinical similarities between these neuropsychological changes and frontal lobe syndromes, together with the lack of cortical involvement, suggest that the "dementia" of progressive supranuclear palsy could be explained by deactivation of the frontal cortex by subcortical lesions. The special importance of pallidal and mesencephalic reticular involvement in the syndrome is hypothetized.

Aged↗