Bibliothek

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Experimental brain research 10 (1970), S. 283-297 
    ISSN: 1432-1106
    Schlagwort(e): Lateral geniculate nucleus ; Alertness ; Non-alertness ; Sleep
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary 1. Cats with chronically implanted electrodes have been used to study the excitability of the lateral geniculate nucleus (LGN) during alertness, non-alertness and sleep. Excitability has been assessed by the amplitude of the field response in the LGN to electrical stimulation of the optic tract and by the amplitude of the antidromic response in the optic tract evoked by stimulating the LGN. 2. Changes in responsiveness associated with eye movements in the awake animal have been avoided. The change from the alert state to the non-alert state is accompanied by a decrease in the excitability of both the LGN cells and the optic tract nerve endings. 3. Postsynaptic excitability decreases further in slow-wave (SW) sleep but during low-voltage-fast-activity (LVF) sleep it returns to a level that is intermediate between that of alertness and non-alertness. During the ponto-geniculooccipital (PGO) waves of LVF sleep excitability is phasically enhanced to above the alert level. 4. Presynaptic excitability during SW sleep and LVF sleep in the intervals between the PGO waves is less than during non-alertness, but during the waves it returns to the alert level. 5. Our findings indicate that the optic tract endings are tonically depolarized in the alert animal and that the depolarization is reduced in non-alertness and reduced further in sleep. Depolarization is phasically enhanced during the PGO waves. 6. It is suggested that the LGN may be the first site on the visual pathway at which information is modified according to the animal's state of consciousness.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Pediatric surgery international 7 (1992), S. 171-173 
    ISSN: 1437-9813
    Schlagwort(e): Crohn's disease ; Diagnosis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The interval between the onset of symptoms and confirmation of the diagnosis of Crohn's disease in children is often many months or years. A number of factors contribute to this diagnostic delay, but the most significant appear to be delay in the patient seeking initial medical help and failure of the medical practitioner to consider the diagnosis at the time of the first medical contact. In this review of 55 children with Crohn's disease the intervals between onset of symptoms, first presentation and diagnosis were examined and the causes of diagnostic delay determined. The main reason a diagnosis was not made at first presentation was because of ignorance of the fact that Crohn's disease could occur in children. In older children, the combination of tiredness, lethargy and iron deficiency anaemia with vague or intermittent abdominal pain was a frequent cause of diagnostic difficulty. However, even in the absence of major gastrointestinal symptoms, the significance of growth failure and delayed puberty was usually recognised if the patient was referred to a paediatrician. Diagnostic delay could well be reduced if medical practitioners involved in the primary care of children were educated to recognise the various ways in which Crohn's disease presents in this age group.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    ISSN: 1437-9813
    Schlagwort(e): Crohn's disease ; Perianal abscess ; Perianal fistula ; Ischiorectal abscess
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Perianal disease (PAD) occurs in 36% of children with Crohn's disease. Its development may precede other manifestations of the disease (3 of 26 patients). PAD ranges in severity from anal fissures and fistulae and localised perianal abscesses to extensive ischiorectal suppuration. Skin tags also occur, and although asymptomatic, may give a valuable clue to the diagnosis of Crohn's disease. Recurrent perianal or ischiorectal sepsis produce the greatest morbidity. PAD may undergo spontaneous resolution without surgical intervention. In contrast, treating patients with severe and chronic PAD may prove frustrating and result in time lost from school.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...