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  • 1
    Electronic Resource
    Electronic Resource
    A feature of caudate control of focal hippocampal epilepsy: evidence for an anterograde pathway (1991)
    Springer
    Experimental brain research 85 (1991), S. 240-242 
    Details
    ISSN: 1432-1106
    Keywords: Caudate nucleus ; Accumbens ; Hippocampal epilepsy ; Inhibition ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Previous experimental evidences showed that the caudate nucleus has a modulatory effect on hippocampal epilepsy. The caudate's regulating action might reach the hippocampus either via the septal region or, retrogradely, via the accumbens nucleus. In order to obtain new data about the pathway involved in caudate hippocampal influence the spreading of abnormal activity towards the nucleus accumbens was studied. Furthermore the effects of caudate stimulation in animals with electrolytic lesions of the nucleus accumbens were analyzed. It was observed that abnormal penicillin-induced activity spreaded from the hippocampus to the nucleus accumbens in about 30 minutes. In animals with and without lesions of nucleus accumbens, caudate stimulation brought about a significant decrease in the frequency and amplitude of hippocampal activity. The results suggest that the nucleus accumbens is reached by the spreading of hippocampal epilepsy but does not participate in the control exerted by the caudate nucleus on the hippocampus. Thus the caudate-induced inhibition takes place through an anterograde caudate-hippocampal circuit, while at the same time excluding retrograde activation by way of a caudate-accumbens-hippocampal pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00230007
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence of a contralateral motor influence on reciprocal inhibition in man (1992)
    Springer
    Journal of neural transmission 4 (1992), S. 257-266 
    Details
    ISSN: 1435-1463
    Keywords: H reflex ; reciprocal inhibition ; contralateral movement ; cutaneous stimulation ; IA interneurone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The role of contralateral movement on both H reflex and reciprocal inhibition was studied. In normal men H reflex was induced by median nerve stimulation. Reciprocal inhibition was achieved through stimulation of the antagonist radial nerve. On this basis the effects of contralateral arm movement were analized. Furthermore the putative influence of exteroceptive origin was also verified by means of digit stimulation. Results showed that contralateral arm movement did not affect H reflex amplitude; on the contrary, it was able to enhance reciprocal inhibition induced by extensors on flexors. Study of cutaneous afferents demonstrated that contralateral digit stimulation failed to elicit modifications on both H reflex and reciprocal inhibition. On the other hand, ipsilateral digit stimulation lowered H reflex amplitude and increased the degree of reciprocal inhibition. Experimental findings underline the possibility that an informational array reaches the contralateral IA interneurone: therefore a mutual (bilateral) interaction among IA interneurones may accordingly be hypothesised.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02260074
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Bilateral reciprocal organisation in man: focus on IA interneurone (1994)
    Springer
    Journal of neural transmission 96 (1994), S. 31-39 
    Details
    ISSN: 1435-1463
    Keywords: H reflex ; reciprocal inhibition ; IA interneurone ; upper limb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The H reflex of flexor carpi radialis and radial-induced reciprocal inhibition were recorded in normal subjects during conditioning stimulation of the contralateral median or radial nerves. It was found that stimulation of the contralateral median nerve enhanced the degree of reciprocal inhibition exerted by the radial nerve on the median nerve, while contralateral radial nerve stimulation reduced the reciprocal inhibition exerted by the extensor on the flexor. In two subjects in which a pure extensor H reflex was recorded specular features were observed following contralateral median and radial stimulation. These findings are considered to be the electrophysiological manifestation of contralateral modulation of reciprocal inhibition, which is likely to act at the level of the IA interneurone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01277926
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    Paper (German National Licenses)
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