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  • 1
    Electronic Resource
    Electronic Resource
    Expansion of innervation territory by afferents involved in plasma extravasation after nerve regeneration in adult and neonatal rats (1989)
    Springer
    Experimental brain research 76 (1989), S. 88-96 
    Details
    ISSN: 1432-1106
    Keywords: Collateral sprouting ; Nerve regeneration ; Mechanoreceptors ; C-fibers ; Plasma extravasation ; Evans blue ; Skin ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The capacity of the saphenous nerve for collateral sprouting was examined by electrophysiological recordings of the activity of low threshold mechanoreceptors and plasma extravasation after C-fiber stimulation in rats. When the sciatic nerve was sectioned neonatally or in adults little evidence was obtained for collateral sprouting of either mechanoreceptors or fibers involved in plasma extravasation in the intact saphenous nerve0 In rats where the sciatic nerve was sectioned and the saphenous nerve was crushed either neonatally or in adults, expansive regenerative reinnervation by thin fibers, but not mechanoreceptors, was observed particularly in glabrous skin. Saphenous crush alone did not cause expansive regenerative reinnervation. The results indicate that much of the collateral sprouting or regenerative reinnervation of the skin observed in morphological studies may represent the presence of fibers not responding to the stimuli used in the present study. It is also suggested that some observations of collateral sprouting may represent changes in responsiveness to stimulation of skin areas with overlapping innervation territories.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253626
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Studies of normal and expansive cutaneous innervation territories of intact and regenerating C-fibres in the hindlimb of the rat (1988)
    Springer
    Inflammation research 25 (1988), S. 260-262 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two sets of experiments were carried out in order to evaluate the unmyelinated (C) fibre innervation of the hindlimb of rats. In the first experiment the normal innervation territory of the various nerves to the skin in the hindfoot was examined by plasma extravasation of Evans blue after antidromic nerve stimulation. Considerable overlap was found in the territories of nerves on the dorsum of the toes and just proximal to the toes. In the second experiment the capacity of C-fibres in the saphenous nerve for growth into deafferented skin was examined. In rats in which the sciatic nerve was previously sectioned, the innervation territory of the intact saphenous nerve expanded slightly into that of the sciatic in about 20% of the cases by “collateral sprouting”. When the sciatic nerve section was combined with ipsilateral saphenous nerve crush, the regenerating C-fibres in the saphenous nerve innervated the sciatic territory in almost 100% of cases, a process we termed “expansive regenerative reinnervation”. We conclude that the existence of overlapping C-fibre innervation territories need to be considered in studies of “collateral sprouting”. However, regenerating C-fibres can innervate foreign deafferented skin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01965028
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    Paper (German National Licenses)
    Fulltext
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