[Directed photonucleolysis of the intervertebral disk and its herniation. Preparation for percutaneous laser diskectomy].

Under model conditions it proved possible, using a whole-body stereotactic apparatus, to focus on a human intervertebral disc and its prolapses and eliminate them by photocoagulation, using a laser. The suitable cannulae have a 3 mm diameter and an output of 6 to 12 W. The necessary lesion is reached in a fractionated manner within 1 minute.

A contribution to the problem of atypical polymyositis in children.

The diagnostics of polymyositis has frequent difficulties, first af all in atypical forms. These can be presented under different names, which lead clinicians to an erroneous way. For example, "climacteric myopathy" (Kaeser) is considered an endocrinous myopathy, "late onset myopathy" a disease joined with old age (as well as "Werner's disease") or "benign children myopathies" (Walton Natrass).

Correlation of histopathological and clinical findings in neuromuscular diseases.

Our file comprises bioptic and necroptic materials of skeletal muscles: progressive spinal muscle atrophy of adults 16, amyotrophic lateral sclerosis 12, infantile progressive spinal amyotrophy Werdnig-Hoffmann 9, chronic progressive amyotrophy Oppenheim 6, syringomyelia and syringobulbia 3, conditions after spinal cord accidents. Diagnosis was difficult because one time the neurological marks were at the head and other time the muscular ones. In the clinical picture there was muscle weakness and atrophy, the spontaneous and palpation painfulness was missing.

Histological and biochemical characteristics of kryoprotected embryonic nervous tissue for transplantation purpose.

In clinical and experimental conditions, a biochemical equipment and a histological image of a fresh embryonic nervous tissue and a tissue conserved by deep freezing for transplantation purposes were examined. By repeated examination of neurotransmitters, the contents of dopamine and serotonin were found unchanged by freezing. In a human embryo, serotonin predominates over dopamine, while in chicken embryos, used for xeno-transplantations, it is vice versa.