Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 207 (1974), S. 183-188 
    ISSN: 1432-1459
    Keywords: Nervus trapezius, innervation ; Trapezius muscle, innervation ; Accessory nerve
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 10 gesunden Versuchspersonen konnten bei supramaximaler Reizung des N. accessorius im hinteren Halsdreieck immer Summenpotentiale von allen 3 Anteilen des M. trapezius abgeleitet werden. Von 8 Patienten mit Läsionen eines N. accessorius zeigten 3 keine Summenpotentiale, während 5 Summenpotentiale in allen 3 Anteilen dieses Muskels hatten. Bei 7 dieser Patienten konnte Willküraktivität im unteren Anteil des M. trapezius registriert werden. Bei 7 weiteren Patienten mit Accessoriusläsionen wurden bei der elektromyographischen Untersuchung unterschiedliche Befunde in den 3 verschiedenen Teilen des Muskels erhoben. Bei der direkten Reizung des freigelegten N. accessorius während Halsoperationen bei 3 Patienten konnten in den 2 unteren Anteilen immer und im oberen Anteil in 2 Fällen Summenpotentiale abgeleitet werden. Die Befunde sprechen dafür, daß der N. accessorius normalerweise alle 3 Teile des M. trapezius versorgt. Eine zusätzliche Versorgung aus cervicalen Wurzeln ist aber sehr wahrscheinlich. Das Verhältnis der zwei Komponenten unterliegt wahrscheinlich großen individuellen Schwankungen. Die vorliegenden Befunde erlauben keine zuverlässige quantitative Schätzung.
    Notes: Summary In 10 healthy subjects stimulation of the accessory nerve in the posterior triangle of the neck always elicited action potentials in all 3 parts of the trapezius muscle. Of 8 patients with a lesion of the accessory nerve 3 had no evoked potentials, while 5 showed evoked potentials in the 3 parts of the muscle. 7 of these patients had voluntary activity in the lower part of the trapezius muscle. 7 patients with lesions of the accessory nerve showed, by electromyographic investigation, no constant pattern of the neurogenic involvement in the 3 different parts of the muscle. Direct stimulation of the accessory nerve during neck dissection in 3 patients gave evoked potentials in the ascending and the horizontal part in all 3 cases and in the descending part in 2 cases. It is concluded that the accessory nerve normally supplies all 3 parts of the trapezius muscle. An additional cervical supply is very probable. The proportions of the two components probably show great variation; a reasonably accurate quantitative estimate cannot be made from the present material.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 140 (1998), S. 38-41 
    ISSN: 1432-2072
    Keywords: Key words Nicotine ; Cognition ; Psychomotor performance ; Task performance and analysis ; Aerospace medicine ; Attention ; Workload ; Chewing gum ; Non-smoker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In a placebo-controlled study, we investigated the influence of nicotine on late-day aviation performance in 15 non-smoking subjects. In a within-subjects design, subjects were tested on 2 days, each lasting 8 h and consisting of three 75-min simulator flights (late-afternoon practice, evening test, night test). Prior to each test, subjects received either nicotine polacrilex 2 mg or placebo gum. As expected, overall performance was significantly better after nicotine, compared to placebo (P 〈 0.01). Post-hoc analysis of individual flight tasks showed that nicotine improved scores on approach to landing, a task which appears to require sustained attention. We conclude that nicotine may improve late-day flight performance in non-smoking aviators.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...