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- W2005060778 abstract "Muscle and peripheral nerve development is clearly dependent on their interaction during early postnatal life. Furthermore, muscle or peripheral nerve activity plays a crucial role in the maturation of the neuromuscular system. In this study, the possible involvement of spinal catecholamines in fast muscle recovery after nerve crush is investigated. Sciatic nerve crush was performed on the fourth to fifth postnatal day. Following that, L-Dopa was administered daily [150 mg/kg body weight (BW)] i.p., until the 21st day after birth. L-Dopa-treated and control groups were then examined electrophysiologically for the contractile properties of extensor digitorum longus (EDL) muscles. Two experimental groups were included in this study: (i) rats whose sciatic nerve was crushed and were treated with L-Dopa and (ii) rats whose sciatic nerve was crushed and were not treated with L-Dopa. The number of motoneurones for both groups was estimated by HRP retrograde labelling. The results showed that the operated L-Dopa-treated EDL muscles of the rats exhibited limited atrophy, slighter impairment of maximal tetanic tension, lesser resistance to fatigue, and polyneuronal innervation than the controls. The number of motoneurones was the same for the operated muscles in both groups of animals and was within the normal ranges. Our findings suggest that catecholamines of locomotion during the early stages of development may have a beneficial effect on fast muscle recovery following nerve crush. The action of L-Dopa is attributed to noradrenaline, which acts through descending spinal noradrenergic pathways, possibly via a(2)-adrenergic receptors at the spinal level." @default.
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- W2005060778 date "2004-10-01" @default.
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- W2005060778 title "Recovery, innervation profile, and contractile properties of reinnervating fast muscles following postnatal nerve crush and administration of l-Dopa" @default.
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- W2005060778 doi "https://doi.org/10.1016/j.devbrainres.2004.07.015" @default.
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