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Biomedical subjects

M Macovei

Publications and source records attributed to M Macovei.

18 recordsLinked to original sources
PubMed2003

Laser control of collective spontaneous emission.

The collective spontaneous emission of a pair of two coupled three-level radiators in vacuum is investigated in the presence of a possibly intense laser field. The parameters describing the collective interaction along with the population and decay rates of all involved dressed states are shown to be controllable by the applied laser field. In particular, all populations of the collective system may be transferred at will in a reversible way into a subradiant state, allowing effective storage and manipulation of the quantum system.

Journal Article↗
PubMed1999

Implications for HIV/AIDS of laws affecting men who have sex with men in Romania. ACCEPT (The Bucharest Acceptance Group).

In this article, the authors discuss the predicament, in Romanian society, of one group that is especially vulnerable to HIV infection and AIDS: men who have sex with men. Such men are driven to secrecy, and discouraged from disclosing themselves even to obtain the help and information they need, because Romanian law prohibits homosexual overtures, denies legal recognition to gay and lesbian organisations, often imposes strong disincentives in the way of those seeking diagnostic tests for HIV or for venereal disease, and still penalizes same sex relations themselves in many circumstances. Social and administrative circumstances in Romania have also aggravated such men's vulnerability. Drawing especially on the United Nations' International Guidelines on HIV/AIDS and Human Rights, the authors offer several recommendations for reform.

HIV Infections↗
PubMedDate not supplied

Neurotrophic trigeminal syndrome after pontine stroke.

The present study describes a patient, aged 72 yrs, with pontine crossed syndrome, displaying ipsilateral to the lesion a syndrome of cranial nerves V, VI, VII, VIII, on the right; a right neocerebellar syndrome; anhidrosis in the right hemibody; contralateral to the lesion: thermoalgic anesthesia with hyperhidrosis in the left hemibody. Concomitant with the pontine lesion, the patient developed torpid trophic ulcerations all over the right hemiface which, in the course of one year, became deformed, retractile, depigmented of hyperpigmented scars, the erosion being so deep at the level of the right nasal wing that the latter disappeared. This clinical picture developed in a patient with basilar invagination of 3 mm and left humeral micromelia. Eight cases of trigeminal torpid trophic ulceration associated with lesions of the brain stem are known till now, but association with vascular pontine lesion has not been described as yet. Etiopathogenic considerations are made.

Aged↗
PubMedDate not supplied

Particular neurological aspects in vascular autoimmune diseases. I. Rheumatoid purpura, Stevens-Johnson syndrome, rheumatoid arthritis and systemic lupus erythematosus.

This study presents particular clinical manifestations in 7 patients with autoiMmune diseases: rheumatoid purpura with right crural nerve paresis (1 case), Stevens-Johnson syndrome with encephalomyeloradicular syndrome (1 case) and left Wallenberg syndrome (1 case), rheumatoid arthritis with right parieto-occipital syndrome (1 case) and Gowers local panatrophy (1 case), systemic lupus erythematosus with confusional state and meningeal syndrome (1 case) and left ictal hemiplegia (1 case). The importance of neurological clinical manifestations at the onset or during the evolution of the autoimmune diseases is emphasized.

Adult↗
PubMedDate not supplied

Option for surgical management of cerebral haematoma: case report.

A 48-year-old male patient, a surgeon, displayed a right temporo-occipital cerebral haematoma (5 x 7 cm). He had a history of chronic left occipital migraine-like cephalalgia from the age of 16 and hypertension was diagnosed when he was 42 years old. As therapy, he used ACE inhibitors, nifedipine and clonidine for hypertension and for cephalalgia a combination of aspirin, phenacetin and caffeine. During the last 2-3 months before the detection of cerebral haematoma, injections with piritramide were made when severe headaches were unbearable. The patient was operated on the 7th day since the onset of cerebral haematoma after a "wait and see" period of repeated clinical and CT-scan assessment. The initial option of the patient was surgical. We consider that the patient's profession (medical/surgical profile) may have played a positive motivation for the surgical option.

Brain↗
PubMedDate not supplied

Chronic sensorimotor polyneuropathy associated with cerebello-extrapyramidal manifestations in a patient with tomaculous neuropathy.

Clinical, electrophysiological and morphological (sural nerve and gastrocnemius muscle biopsies) data of a 57-year-old man with a chronic sensorimotor polyneuropathy of Charcot-Marie-Tooth type associated with a progressive cerebello-extrapyramidal syndrome are reported. Patient's family data were negative. Nerve structural and ultrastructural examinations revealed the morphological picture of a tomaculous neuropathy. The association of different clinical syndromes and the specificity of the tomaculous neuropathy are discussed.

Basal Ganglia Diseases↗
PubMedDate not supplied

Tomaculous neuropathy with unusual clinical aspects.

Tomaculous neuropathy represents the morphological substrate of the recurrent familial neuropathy with liability to pressure palsies. Some ultrastructural changes characterizing the tomaculous neuropathy can occur as incidental aspects in other different neuropathies. Few tomaculous neuropathy cases with clinical aspect of chronic polyneuropathy without paretic episodes have been mentioned in the literature. In the present work, we report four cases who offered the morphological surprise of a true tomaculous neuropathy with 15-37% of the teased fibres bearing tomaculae sized: 55-106 microns/20-23 microns, on the background of a demyelinating neuropathy with 25-56% of the teased fibres showing segmental de- or remyelination. The clinical and electrophysiological diagnoses of these 4 patients were: HSMN type I (2 cases), HSMN type VIII (polyneuropathy associated with a cerebello-extrapyramidal syndrome -1 case), and a neurogenic scapuloperoneal syndrome (1 case). The specificity of the tomaculous neuropathy is discussed.

Adolescent↗