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  • Neuronal connections  (1)
  • Respiratory rate  (1)
  • 1985-1989  (2)
  • 1
    Electronic Resource
    Electronic Resource
    The source of the nerve fibres forming the deep muscular and circular muscle plexuses in the small intestine of the guinea-pig (1987)
    Springer
    Cell & tissue research 247 (1987), S. 497-504 
    Details
    ISSN: 1432-0878
    Keywords: Enteric nervous system ; Intestine, small ; Nerves, degeneration ; Neuronal connections ; Guinea-pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A quantitative ultrastructural study was made of the neuntes forming the deep muscular and circular muscle plexuses of the guinea-pig small intestine following microsurgical lesions designed to interrupt intrinsic and extrinsic nerve pathways within the intestinal wall. Removal of a collar of longitudinal muscle with attached myenteric plexus from the circumference of a segment of small intestine resulted in the subsequent disappearance of 99.3% of neurites in the underlying circular muscle. The few surviving neurites in the deep muscular plexus and circular muscle disappeared completely from lesioned segments that were, in addition, extrinsically denervated surgically. These results indicate that the majority of nerve fibres in the deep muscular and circular muscle plexuses of the guinea-pig small intestine is intrinsic to the intestine and originates from nerve cell bodies located in the overlying myenteric plexus. At the light-microscopic level, nerve bundles were traced from the myenteric plexus to the circular muscle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215742
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  • 2
    Electronic Resource
    Electronic Resource
    Techniques for the analysis of long-term cardiorespiratory recordings from infants (1988)
    Springer
    Medical & biological engineering & computing 26 (1988), S. 282-288 
    Details
    ISSN: 1741-0444
    Keywords: Data classification ; Heart rate ; Long-term recordings ; Respiratory rate ; Time-series analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The paper describes a series of techniques for the analysis of long-term cardiorespiratory recordings from infants. The analysis performed is based on analysing the respiratory rate, respiratory-rate variability, heart rate and the heart-rate variability measured for nonoverlapping time epochs of approximately 100s duration throughout the recordings. Three descriptors of each of these four data series have been used. First, the mean value and standard deviation; secondly, the probability density function, which was then processed by a principal-components factor analysis to achieve data reduction and classification to make comparisons between different groups of infants; and finally, the power spectral density function. These techniques provide a comprehensive method for analysing long-term cardiorespiratory recordings which should greatly extend their value for both routine clinical use and for research purposes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02447082
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    Paper (German National Licenses)
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