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  • Cluster headache  (1)
  • DBI  (1)
  • Ulbricht effect  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Documenta ophthalmologica 65 (1987), S. 343-348 
    ISSN: 1573-2622
    Keywords: focal electroretinogram ; macular disease ; stray light ; Ulbricht effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A technique for the simultaneous recording of two small-field electroretinograms (ERGs), macular and paramacular, employing standard apparatuses for stimulation and analysis is described. The stimuli consisted of two adjacent checks (6 deg/side) obtained by masking the display of a commercially available TV pattern stimulator. The checks were square-wave-modulated in counterphase at 3.12 Hz. The subjects fixated the center of one of two checks. In one stimulus cycle, two ERGs could be distinguished: one from the macular area and the other from the adjacent area. The macular ERG is about twice as large as the paramacular. ERGs recorded by this technique can be considered focal since (i) they show a sharp fall-off in amplitude when the stimulus is displaced from the fovea, and (ii) they are no longer recordable when the stimulus is centered on the optic disk or on a large macular scar.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1590-3478
    Keywords: Epilepsy ; Benzodiazepine receptors ; Immunology ; DBI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Recenti dati sperimentali hanno evidenziato che i recettori periferici delle benzodiazepine (PBR) possono ricoprire un ruolo nell'epilessia e nell'azione dei farmaci antiepilettici. Poiché i PBR sono presenti anche sui linfociti in circolo, dove è stato dimostrato che possono interagire con i farmaci antiepilettici, abbiamo ricercato le possibili modificazioni di questi recettori e del loro ligando endogeno diazepam binding inhibitor (DBI) in linfociti di pazienti epilettici trattati con farmaci diversi. La densità recettoriale dei PBR risultava aumentata del 50–80% in pazienti trattati con carbamazepina, fenobarbital, ed acido valproico, rispetto ai controlli ed ai pazienti epilettici non trattati. Le concentrazioni di DBI risultavano significativamente aumentate nei linfociti di pazienti epilettici non trattati e, mostravano solo un limitato aumento dopo terapia. È tutt'ora in discussione la possibilità che le modificazioni di PBR e DBI nei linfociti di pazienti epilettici possano essere correlate alle alterazioni immunologiche segnalate in questi pazienti e/o possano essere considerate come possibili indicatori di modificazioni neurochimiche presenti nel sistema nervoso centrale.
    Notes: Abstract Recent experimental evidence has suggested that peripheral benzodiazepine receptors (PBR) may play a role in epilepsy and antiepileptic drug action. Since PBR are also present in circulating lymphocytes, and may interact with anticonvulsant drugs, this study was designed to look for possible modifications of these receptors and their endogenous ligand diazepam binding inhibitor (DBI) in the lymphocytes of epileptic patients treated with various drugs. PBR levels were 50% to 80% higher in patients treated with carbamazepine, phenobarbital and valproic acid than in controls and untreated epileptics. DBI levels were significantly increased in the lymphocytes of untreated patients, and showed only a slight further increase after anticonvulsant therapy. The possibility that PBR and DBI modifications in the lymphocytes of epileptic patients may be linked to the immunological alterations reported in these patients and/or may represent possible markers of neurochemical modifications in the central nervous system is discussed.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1590-3478
    Keywords: Cluster headache ; bypass surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario A distanza di oltre due anni da un intervento di bypass tra aorta ascendente ed arteria anonima un uomo di 51 anni con cefalea a grappolo non ha più riferito ulteriori episodi algici. Viene avanzata l'ipotesi che l'intervento abbia svolto un ruolo causale nella remissione di tali episodi.
    Notes: Abstract A 51-year-old man with cluster headache has been free from cluster attacks for over two years following ascending aorta/innominate artery bypass surgery for correction of an atherosclerotic narrowing at the origin of the innominate artery. Surgery may have been a causal factor in the remission of these attacks.
    Type of Medium: Electronic Resource
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