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Journal of Experimental Biology 96,125-130 (1982)
Published by Company of Biologists 1982

Neural Lesions Can Cause Dendritic Sprouting of an Undamaged Adult Insect Motoneurone

ROBERT M. PITMAN 1 and KATHRYN A. RAND 1

1 Department of Physiology and Pharmacology, St Andrews University, St Andrews, Fife, KY16 9TS, Scotland

The effect of nerve lesions upon the dendritic branching of the metathoracic ‘fast’ coxal depressor motoneurone in the adult cockroach, Peri-planeta americana has been studied by intracellular cobalt injection. Dendrites may sprout after several nerve trunks entering the metathoracic ganglion are lesioned. Direct surgical damage to the neurone is not a pre-requisite for sprouting. New sprouts may extend into regions of the ganglion or into nerve trunks which the neurone would not normally occupy. The developing sprouts appear to grow preferentially within regions containing degenerating nerve fibres. The nerve sprouts frequently have varicosities along their length and at their ends.

Submitted on February 27, 1981






© The Company of Biologists Ltd 1982