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Journal of Experimental Biology, Vol 198, Issue 3 817-820, Copyright © 1995 by Company of Biologists

JOURNAL ARTICLES

A method for recording electrical activity from the body wall nerve nets in sea anemones

K Cho and I Mcfarlane

Glass microelectrodes were used to record electrical activity from thin rings cut from the column of the sea anemone Calliactis parasitica. This is the first time that pulses have been recorded from the nervous system in the column. Three pulse types were detected, types A, B and C. Type A pulses are probably associated with neurones of the through-conducting nerve net. Type B pulses may be from the endodermal slow conduction system (SS2). Type C pulses have not previously been recorded and are thought to represent activity in a local nerve net. At this stage we cannot positively state whether the recordings are intracellular from endodermal myoepithelial cells or are extracellular from the sub-epithelial region.




© The Company of Biologists Ltd 1995