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Science 2 April 1982:
Vol. 216. no. 4541, pp. 73 - 75
DOI: 10.1126/science.216.4541.73
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Articles

Transplantation of the Cockroach Circadian Pacemaker

TERRY L. PAGE 1

1 Department of General Biology, Vanderbilt University, Nashville, Tennessee 37235

Surgical removal of the optic lobes of the cockroach Leucophaea maderae followed by transplantation of the optic lobes from another individual led to a restoration of the circadian activity rhythm in 4 to 8 weeks. The free-running period of the restored rhythm was determined by the period of the donor rhythm before surgery. The results suggest that the transplanted optic lobe contains a circadian clock that regenerates those neural connections with the host brain that are necessary to drive the circadian rhythm of activity.

Submitted on September 14, 1981
Revised on December 9, 1981


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