Search PubMed⌕ Search

Biomedical subjects

J De Reuck

Publications and source records attributed to J De Reuck.

At least 145 records · Page 8Linked to original sources
PubMed1977

The target phenomenon in rat muscle following tenotomy and neurotomy. A comparative light microscopic and histochemical study.

Target fibers were checked at regular intervals in two groups of rat gastrocnemius muscle namely after tenotomy and neurotomy. The highest amount of target fibres was observed during the first week following tenotomy and around the seventh week, when the muscle became again functional by spontaneous union of the tendon. The target phenomenon was restricted to the type II fibres. It appeared also in the early stage of re-innervation, 5 weeks following neurotomy and remained present subsequently in a transitional zone between denervated and re-innervated muscle fibres and was restricted to the type I muscle fibres. The target phenomenon was not the only histochemical alteration observed following tenotomy and neurotomy. This experimental study allowed to determinate more precisely the causal factors of the target phenomenon.

Adenosine Triphosphatases↗
PubMed1977

Acute viral polymyositis with predominant diaphragm involvement.

A 20-month-old mentally retarded girl developed an acute upper respiratory infection, followed by breathing difficulties, leading to death. Picorna virus-like particles were demonstrated in a mildly affected quadriceps femoris muscle biopsy, while the necropsy findings demonstrated an acute polymyositis with predominant diaphragm involvement. The mental retardation was due to micropolygyria of the brain. Initial respiratory difficulties are an unknown feature of polymyositis. In this case the upper respiratory infection, possibly caused by a Coxsackie B2, is evoked as responsible for this unusual distribution of the acute viral polymyositis.

Adult↗
PubMed1977

A progressive congenital myopathy. Initial involvement of the diaphragm with type I muscle fiber atrophy.

An uncommon case of initial respiratory distress during the first months of life as the result of bilateral diaphragmatic weakness is presented. The biopsy and necropsy findings show a progressive congenital myopathy with type I muscle fiber atrophy and predominant involvement of the respiratory muscles. The lesions, observed in the central nervous system are due to the severe hypoxia. The morphological findings are discussed in relation to the etiology and the clinical picture of the disease.

Brain↗
PubMed1976

The target phenomenon in human muscle: a comparative light microscopic histochemical and electron microscopic study.

A large number of target fibres is observed in a muscle biopsy from a patient with an acute flaccid paraplegia of the lower limbs due to a polyneuroradiculopathy of unknown origin. With the electron microscope up to 4 structural zones are seen in the target fibers. The histochemical and ultrastructural observations in this case, suggest that the "target fiber" phenomenon is due to a disturbed trophic influence of the nervous system.

Female↗
PubMed1976

Myasthenic syndrome in polymyositis.

The case report of a 23-year-old man with polymyositis and some myasthenic features is presented. The biopsy findings suggest a preferential involvement of the neuromuscular junctions by the inflammatory process, a fact which explains the clinical syndrome.

Adult↗
PubMed1976

Fetal Chiari's type III malformation.

The morphological findings in a 4- to 5-month-old female fetus with Chiari's type III malformation are described. This observation strongly supports the view that a defective closure of the roof plate is the primary cause of this malformation, and relates it to the Arnold-Chiari and Dandy-Walker syndromes.

Arnold-Chiari Malformation↗
PubMed1976

Biometrical and histochemical comparison between extra- and intrafusal muscle fibres following tenotomy.

The average diameter of the different enzymatic types of extra- and intrafusal muscle fibres is determined by means of a one millimeter scale ocular micrometer in the gastrocnemius muscle of twenty four female rats during three months, at regular intervals following tenotomy. There is a predominant atrophy of the type II extrafusal as well as intrafusal fibres in the period of immobilization. However, when the muscle becomes functional again, by healing and elongation of the tendon, the intrafusal type II fibres remain atrophic in contrast to the extrafusal ones, which regain their normal size.

Achilles Tendon↗
PubMed1975

Transitional forms of Arnold-Chiari and Dandy-Walker malformations.

The morphological findings in 12 cases of Arnold-Chiari and 3 cases of Dandy-Walker malformations are described and compared to those in 2 cases of congenital hydrocephalus of unknown origin, 1 case of isolated meningo-myelocele and 2 cases of normal newborn brains. Lesions common to both types of malformation indicate a same time-related embryogenetic defect of the roofplate of the rhombencephalon, that does not allow the inferior vermis and the choroid plexus to turn inward into the fourth ventricle.

Arnold-Chiari Malformation↗
PubMed1975

Paralytic pontine exotropia in subarachnoid hemorrhage. A clinicopathological correlation.

A syndrome of combined right lateral gaze palsy and right internuclear ophthalmoplegia, followed by a left exotropia in a case of subarachnoid hemorrhage is presented. At necropsy a single small pontine end-zone infarction was found, involving the medial part of the right paramedian pontine reticular formation, the tectospinal tract and the ventral part of the right medial longitudinal fasciculus. The fila radicularia of the right abducens nerve passed through the necrotic area. The mechanism of these characteristic ocular motor disturbances in relation to the post mortem findings and the topopathogenesis of the pontine infarction are discussed.

Female↗
PubMed1975

The angioarchitecture of the astroblastoma.

The angioarchitecture of an astroblastoma of the corpus collosum is studied on serial carotid angiograms, made during life, and on post mortem angiograms, performed by filling of the cerebral arterial system with a colloidal bariumsulphate solution and by using the translucidation technique. The results of these investigations are compared to the histological aspect of the tumour. This study reveals the close relationship between the astroblasts and the bloodvessels. The angioarchitectural pattern of this tumour is characterized by new formation of capillaries. It is considered as an additional support to classify the astroblastoma as a separate type of glioma.

Astrocytoma↗
PubMed1975

The anatomy of the late radiation encephalopathy.

The clinico-pathological data and the topography of the lesions were determined in 13 cases of late radiation encephalopathy. In one case the arterial vascularisation was studied by the translucidation technique after filling of the blood vessels with a colloidal barium sulphate solution. The radiation lesions consisted of areas of focal necrosis and of diffuse demyelination and necrosis of the deep cerebral structures and the brain stem. Demyelination was predominantly present in cases of late appearance of the neurological symptoms while necrosis was found in cases with a short latency period. The cerebral cortex and the arcuate fibres were always the most preserved structures. The topography of the focal lesions in the cerebral hemispheres and in the brain stem corresponded well to the vascular supply areas of the deep perforating arteries, while the diffuse lesions always had a predominant distribution in the periventricular arterial end- and border-zones. These observations were also confirmed by a post mortem angiographic study. The present report argues once more for a vascular aetiology as cause of the late radiation encephalopathy.

Adult↗