Clinical Neuroscience

[Experimental data on the mechanism of the tetanus inhibitory reflex]

KIBÉDI Tibor1, DIRNER Zoltán2

MARCH 11, 1954

Clinical Neuroscience - 1954;7(01)

[1. Our various tetanus interventions: During max. flexion, extension, trunk flexion, and slight compression of the chest, one or more muscle groups are always stretched. Prolongation of muscle or tendon is an adequate stimulus of proprioceptive receptors. Proprioceptive stimuli trigger the tetanus reflex. 2. Tetanus inhibition lasts only as long as the muscle is kept stretched. 3. During inhibition, the animal is capable of appropriate reflex movement. 4. The anti-tetanus reflex, when properly affected, also develops in the spinal cord of an incised animal during transection. 5. Clonus spasms caused by Cardiazol cannot be reduced by effects based on muscle or muscle elongation. 6. If the spinal cord is cut at the height of one of the dorsal segments and then the animal is poisoned with strychnine, the known effect on the pharmacy develops weaker and later during the incision.]

AFFILIATIONS

  1. Gyulai Megyei Kórház Röntgenosztálya
  2. Szegedi Orvostudomány Egyetem Gyógyszertani Intézet

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Clinical Neuroscience

[Data on the symptoms of damage to the gyrus cinguli and the medial cerebral sulcus]

GERÉB Tibor

[Clinical symptoms of the medial surface of the left hemisphere were analyzed in connection with an astrocytoma destroying the cingulitis of the left gyrus and the contiguous part of the medial surface of the forehead and wall lobe. Some of the epileptic seizures were introduced by euphoria as an aura. This can be interpreted based on the internal organ projection relationships of the medial brain surface, which is also supported by anatomical and experimental data. The onset of epileptic seizures in the hand, resp. his appearance there alone — with anatomically proven sparing of the fibers from the arm center of preecentral cortical representation — can be traced back to the excitement of the additional motor area described by Penfield, just as the speech inhibition observed once. Disorders of personal consciousness (Kleist) were not detectable.]

Clinical Neuroscience

[Brain tumour and pregnancy]

MAJERSZKY Klára

[1. Data from the literature differ on the association between brain tumor and pregnancy. Some say in animal experiments that pregnancy delays or has no effect on tumor growth, others say it specifically accelerates it. Few cases have been reported in humans in which pregnancy did not adversely affect brain tumor symptoms. In 80% of adverse events, childbirth exacerbated brain tumor symptoms. 2. In 14 years among 221 women with brain cancer , 17 pregnant, resp. we observed patients who already had a brain tumor during the last pregnancy. 3. In six cases, pregnancy and childbirth had no detectable effect on the tumor. With the onset of cancerous symptoms, resp. pregnancy can be directly related to pregnancy in 6 cases and childbirth in 2 cases (47%). In three cases, the co-occurrence of pregnancy and cancer symptoms is apparently an accidental encounter. 4. Based on our own cases, the essence of the issue of the relationship between pregnancy and brain tumor is not the growth retardation or in the problem of acceleratio, but the cases are approx. half of it is seen in the upset of intracranial hydrodynamic balance due to gestational disorders. 5. Things to do change from time to time. Radical neurosurgery or, if this is not possible, subtemporal or posterior scala decompression. In the latter case, cesarean delivery may be recommended. In previously operated cases, if the surgery was not radical or the tumor is prone to recurrence, an abortion is warranted if the patient's condition has not deteriorated. If you have already had threatening tumor symptoms, reoperation is the right solution. In the case of pituitary adenoma, artificial abortion must be performed when the tumor symptoms worsen.]

Clinical Neuroscience

[Hemispherical tuberculoma]

SZABÓ Gyula

[Its frequency is shown differently by statistics of different authors. Their ratio to total tumors of the brain, according to Anglo-Saxon authors (1), is 1.5% -3.6%. In data from Soviet neurosurgical institutes (2), 2.1–3.4% of all brain tumors were tuberculoma. The reason for the differences in the statistics is that tuberculoma often does not undergo neurosurgery but is detected only by autopsy.]

Clinical Neuroscience

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Late simultaneous carcinomatous meningitis, temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting with mono-symptomatic vertigo – a clinico-pathological case reporT

KISS Geza Jozsef, JARABIN András János, MOLNÁR Anna Fiona, KLIVÉNYI Péter, TISZLAVICZ László, GION Katalin, FÖLDESI Imre, ROVÓ László, BELLA Zsolt

Although vertigo is one of the most common complaints, intracranial malignant tumors rarely cause sudden asymmetry between the tone of the vestibular peripheries masquerading as a peripheral-like disorder. Here we report a case of simultaneous temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting as acute unilateral vestibular syndrome, due to the reawakening of a primary gastric signet ring cell carcinoma. Purpose – Our objective was to identify those pathophysiological steps that may explain the complex process of tumor reawakening, dissemination. The possible causes of vestibular asymmetry were also traced. A 56-year-old male patient’s interdisciplinary medical data had been retrospectively analyzed. Original clinical and pathological results have been collected and thoroughly reevaluated, then new histological staining and immunohistochemistry methods have been added to the diagnostic pool. During the autopsy the cerebrum and cerebellum was edematous. The apex of the left petrous bone was infiltrated and destructed by a tumor mass of 2x2 cm in size. Histological reexamination of the original gastric resection specimen slides revealed focal submucosal tumorous infiltration with a vascular invasion. By immunohistochemistry mainly single infiltrating tumor cells were observed with Cytokeratin 7 and Vimentin positivity and partial loss of E-cadherin staining. The subsequent histological examination of necropsy tissue specimens confirmed the disseminated, multi-organ microscopic tumorous invasion. Discussion – It has been recently reported that the expression of Vimentin and the loss of E-cadherin is significantly associated with advanced stage, lymph node metastasis, vascular and neural invasion and undifferentiated type with p<0.05 significance. As our patient was middle aged and had no immune-deficiency, the promoting factor of the reawakening of the primary GC malignant disease after a 9-year-long period of dormancy remained undiscovered. The organ-specific tropism explained by the “seed and soil” theory was unexpected, due to rare occurrence of gastric cancer to metastasize in the meninges given that only a minority of these cells would be capable of crossing the blood brain barrier. Patients with past malignancies and new onset of neurological symptoms should alert the physician to central nervous system involvement, and the appropriate, targeted diagnostic and therapeutic work-up should be established immediately. Targeted staining with specific antibodies is recommended. Recent studies on cell lines indicate that metformin strongly inhibits epithelial-mesenchymal transition of gastric cancer cells. Therefore, further studies need to be performed on cases positive for epithelial-mesenchymal transition.

Clinical Neuroscience

Comparison of direct costs of percutaneous full-endoscopic interlaminar lumbar discectomy and microdiscectomy: Results from Turkey

ÜNSAL Ünlü Ülkün, ŞENTÜRK Salim

Microdiscectomy (MD) is a stan­dard technique for the surgical treatment of lumbar disc herniation (LDH). Uniportal percutaneous full-endoscopic in­terlaminar lumbar discectomy (PELD) is another surgical op­tion that has become popular owing to reports of shorter hos­pitalization and earlier functional recovery. There are very few articles analyzing the total costs of these two techniques. The purpose of this study was to compare total hospital costs among microdiscectomy (MD) and uniportal percutaneous full-endoscopic interlaminar lumbar discectomy (PELD). Forty patients aged between 22-70 years who underwent PELD or MD with different anesthesia techniques were divided into four groups: (i) PELD-local anesthesia (PELD-Local) (n=10), (ii) PELD-general anesthesia (PELD-General) (n=10), (iii) MD-spinal anesthesia (MD-Spinal) (n=10), (iv) MD-general anesthesia (MD-General) (n=10). Health care costs were defined as the sum of direct costs. Data were then analyzed based on anesthetic modality to produce a direct cost evaluation. Direct costs were compared statistically between MD and PELD groups. The sum of total costs was $1,249.50 in the PELD-Local group, $1,741.50 in the PELD-General group, $2,015.60 in the MD-Spinal group, and $2,348.70 in the MD-General group. The sum of total costs was higher in the MD-Spinal and MD-General groups than in the PELD-Local and PELD-General groups. The costs of surgical operation, surgical equipment, anesthesia (anesthetist’s costs), hospital stay, anesthetic drugs and materials, laboratory wor­kup, nur­sing care, and postoperative me­dication diffe­red significantly among the two main groups (PELD-MD) (p<0.01). This study demonstrated that PELD is less costly than MD.

Lege Artis Medicinae

[History of vaccine production in Hungary ]

ÓCSAI Lajos

[This study presents the complete history of the Hungarian vaccine production, partly in association with the process of fighting vaccine-preventable infectious diseases, and underlines the fact that every government actively contributed to the age-adjusted mandatory vaccination schedule of the past 140 years. It demonstrates the various achievements from the smallpox lymph production through the launch of diphtheria serum production at Phylaxia and the establishment of the National Public Health Institute (OKI) with its vaccine production and the later institutional transformation of OKI into Humán as economic corporation to its closure. Among all OKI’s vaccine production activities, this study focuses on the production of influenza vaccines, due to its international importance in the 1960s and 1970s. The vaccine production against diphtheria tetanus and pertussis stands out from Humán’s activities, and the tetanus component of this vaccine is still used in the products of a multinational vaccine manufacturer. ]

Lege Artis Medicinae

[Risk of nonsteroidal antiinflammatory drugs. Focus on aceclofenac]

FARSANG Csaba

[Nonsteroidal antiinflammatory drugs (NSAIDs) are among the most frequently used pharmaceuticals. Nevertheless, a number of studies emphasized that NSAIDs were damaging not only the gastrointestinal (GI), but also the cardiovascular (CV) system, could increase the blood pressure, the frequency of coronary events (angina, myocardial infarction) and stroke incidence, as well as they might deterio­rate renal functions. The National Institute for Health and Care Excellence (NICE) did not find evidence that administering NSAIDs could increase the risk of developing COVID-19 or worsened the condition of COVID-19 patients. However, unwanted effects of specific drugs differ substantially in their occurrence and seriousness as well. It seemed to be for a long time that the NSAIDs provoked higher GI-risk was closely related to the COX1/COX2 selectivity, like the cardiovascular (CV) risk to the COX2/COX1 selectivity, however, the recent data did not prove it clearly. Based on the available literature while pondering the gastrointestinal and cardiovascular adverse events, among all NSAIDs the aceclofenac profile seemed to be the most favourable.]

Lege Artis Medicinae

[Second game, 37th move and Fourth game 78th move]

VOKÓ Zoltán

[What has Go to do with making clinical decisions? One of the greatest intellectual challenges of bedside medicine is making decisions under uncertainty. Besides the psychological traps of traditionally intuitive and heuristic medical decision making, lack of information, scarce resources and characteristics of doctor-patient relationship contribute equally to this uncertainty. Formal, mathematical model based analysis of decisions used widely in developing clinical guidelines and in health technology assessment provides a good tool in theoretical terms to avoid pitfalls of intuitive decision making. Nevertheless it can be hardly used in individual situations and most physicians dislike it as well. This method, however, has its own limitations, especially while tailoring individual decisions, under inclusion of potential lack of input data used for calculations, or its large imprecision, and the low capability of the current mathematical models to represent the full complexity and variability of processes in complex systems. Nevertheless, clinical decision support systems can be helpful in the individual decision making of physicians if they are well integrated in the health information systems, and do not break down the physicians’ autonomy of making decisions. Classical decision support systems are knowledge based and rely on system of rules and problem specific algorithms. They are utilized widely from health administration to image processing. The current information revolution created the so-called artificial intelligence by machine learning methods, i.e. machines can learn indeed. This new generation of artificial intelligence is not based on particular system of rules but on neuronal networks teaching themselves by huge databases and general learning algorithms. This type of artificial intelligence outperforms humans already in certain fields like chess, Go, or aerial combat. Its development is full of challenges and threats, while it presents a technological breakthrough, which cannot be stopped and will transform our world. Its development and application has already started also in the healthcare. Health professionals must participate in this development to steer it into the right direction. Lee Sedol, 18-times Go world champion retired three years after his historical defeat from AlphaGo artificial intelligence, be­cause “Even if I become the No. 1, there is an entity that cannot be defeated”. It is our great luck that we do not need to compete or defeat it, we must ensure instead that it would be safe and trustworthy, and in collaboration with humans this entity would make healthcare more effective and efficient. ]