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  • 1
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Diel vertical migration of a stable and well-defined population of Nordic krill,Meganyctiphanes norvegica (Crustacea, Euphausiacea) was investigated during eight days in August 1989, in the Läsö-Deep, East of the Danish island Läsö. Net catches with a multi-net (MOCNESS) and measurements with a moored and a shipboard Acoustic Doppler Current Profiler (ADCP) were compared. Backscattered energy as a measure for biomass gave good correlations to the dry weight ofM. norvegica and smaller zooplankton from net catches. Diel migratory patterns matched well, as determined, parallel with both methods. Migratory vertical velocity was determined with ADCP at 2–3 cm sec−1. The potential for the use of ADCPs for biological investigation is discussed. Vertical migration was dependent on environmental parameters. The krill did not cross a temperature barrier of 14°C, although rich food sources were situated beyond it. Differences in salinity did not play a role. Currents were involved in plankton distribution. Light was an important Zeitgeber (synchronizer) and determined the density of the krill aggregations. Feeding behaviour did not interfere with the light-induced migratory pattern of Nordic krill at the Läsö-Deep.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 215-216 (June 1996), p. 291-296 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Dysphagia 10 (1995), S. 255-258 
    ISSN: 1432-0460
    Keywords: Cricopharyngeal myotomy ; Deglutition ; Deglutition disorders ; Neurogenic dysphagia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The role of cricopharyngeal (CP) myotomy in the management of neurogenic oropharyngeal dysphagia remains controversial. A review of the literature regarding outcomes of CP myotomy for dysphagia in the setting of a variety of neurological disorders indicates a preponderance of favorable results. There are several potential explanations for reported improvement after CP myotomy for neurogenic dysphagia, including the possibility that it is an effective treatment, at least for selected patients. If this is true, appropriate selection criteria for this treatment of neurogenic dysphagia may include (1) intact voluntary initiation of swallowing, (2) adequate propulsive force generated by the tongue and pharyngeal constrictors, (3) videofluorographic demonstration of obstruction to bolus flow at the CP segment (rather than merely retention in the pharyngeal recesses), (4) manometric evidence of relatively elevated CP pressure in relation to the pharynx, and (5) relatively favorable neurological prognosis. The effectiveness and safety of CP myotomy for patients with neurogenic dysphagia are unlikely to be resolved without a prospective, controlled multicenter study enrolling patients who meet such criteria.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Dysphagia 12 (1997), S. 226 -231 
    ISSN: 1432-0460
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Dysphagia 10 (1995), S. 248-254 
    ISSN: 1432-0460
    Keywords: Deglutition ; Deglutition disorders ; Iatrogenic disorders ; Neurogenic dysphagia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Oropharyngeal dysphagia due to iatrogenic neurological dysfunction may relate to either medication side effects or surgical complications. There are several general mechanisms by which neurological side effects of medications can cause or aggravate oropharyngeal dysphagia. These include decreased level of arousal, direct suppression of brainstem swallowing regulation, movement disorders (dyskinesias, dystonias, and parkinsonism), neuromuscular junction blockade, myopathy, oropharyngeal sensory impairment, and disturbance of salivation. Postsurgical oropharyngeal dysphagia due to neurological dysfunction has been described in association with carotid endarterectomy, esophageal cancer surgery, anterior cervical fusion, and ventral rhizotomy for spasmodic torticollis. A potential explanation for oropharyngeal dysphagia following these surgical procedures is intraoperative mechanical disruption of the innervation of the pharyngeal constrictor muscles by the pharyngeal plexus. Posterior fossa and skull base surgery can lead to dysphagia as a result of intraoperative damage to brainstem centers and/or cranial nerves involved in swallowing. Perioperative stroke is the most likely explanation for oropharyngeal dysphagia appearing acutely following surgery, especially if the type of surgery predisposes to embolism or hypoperfusion.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Dysphagia 13 (1998), S. 235-236 
    ISSN: 1432-0460
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Dysphagia 14 (1999), S. 237-241 
    ISSN: 1432-0460
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0460
    Keywords: Dysphagia ; Swallowing therapy ; Swallowing rehabilitation ; Deglutition ; Deglutition disorders
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The results of swallowing therapy in 58 patients with neurologic disorders are presented. All patients received tube feeding, either partially or exclusively, at admission, and successful outcomes, defined as exclusively oral feeding, were achieved in 67% of patients over a median treatment interval of 15 weeks. A subset of 11 patients who had experienced disease onset 25 weeks or more prior to admission nonetheless had a similar success rate of 64%. No other pretreatment variable, including age, localization of lesion, type or degree of aspiration, or cognitive status, correlated with successful outcome. Indirect therapy methods such as stimulation techniques and exercises to enhance the swallowing reflex, alter muscle tone, and improve voluntary function of the orofacial, lingual, and laryngeal musculature were utilized in all but 1 patient. Direct methods including compensatory strategies such as head and neck positioning, and techniques such as supraglottic swallowing and the Mendelsohn maneuver were additionally employed in nearly one-half of patients. Swallowing therapy is associated with successful outcome, as defined by exclusively oral feeding, among patients with neurogenic dysphagia, regardless of pretreatment variables including time since disease onset. Indirect treatment methods appear to be effective when used either alone or in combination with direct methods. Achievement of oral feeding is not associated with undue risk of pneumonia. Further rigorous scientific studies are needed.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Dysphagia 11 (1996), S. 23-24 
    ISSN: 1432-0460
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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