|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
Journal of Experimental Biology, Vol 161, Issue 1 1-24, Copyright © 1991 by Company of Biologists
JOURNAL ARTICLES |
KJ Lohmann, AO Willows and RB Pinter
Department of Zoology, University of Washington, Seattle 98195.
Diverse animals can orient using geomagnetic cues, but little is known about the neurophysiological mechanisms that underlie magnetic field detection. The marine mollusc Tritonia diomedea (Bergh) has a magnetic sense and its nervous system is amenable to cellular-level electrophysiological analysis. In a semi-intact whole-animal preparation, intracellular recordings from the large, visually identifiable neurons left pedal 5 (LPe5) and right pedal 5 (RPe5) in the brain of Tritonia revealed enhanced electrical activity in response to changes in ambient earth-strength magnetic fields. No such changes in activity were observed in approximately 50 other neurons subjected to identical magnetic stimuli. The responses of LPe5 were characterized by increases in spiking frequency occurring about 6-16 min after the ambient magnetic field had been rotated to a new position. The response was abolished when the brain had been isolated from the periphery of the animal by severing nerves, a procedure that also transected prominent neurites of LPe5. We hypothesize that LPe5 is one component of a neural circuit mediating detection of the earth's magnetic field or orientation to it.
This article has been cited by other articles:
|
|
 |
|
  J. A. Murray, J. Estepp, and S. D. Cain Advances in the neural bases of orientation and navigation Integr. Comp. Biol., December 1, 2006; 46(6): 871 - 879. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. C. Wyeth and A. O. D. Willows Odours detected by rhinophores mediate orientation to flow in the nudibranch mollusc, Tritonia diomedea J. Exp. Biol., April 15, 2006; 209(8): 1441 - 1453. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. C. Wyeth and A. O. D. Willows Field Behavior of the Nudibranch Mollusc Tritonia diomedea Biol. Bull., April 1, 2006; 210(2): 81 - 96. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. C. Wyeth, O. M. Woodward, and A. O. D. Willows Orientation and Navigation Relative to Water Flow, Prey, Conspecifics, and Predators by the Nudibranch Mollusc Tritonia diomedea Biol. Bull., April 1, 2006; 210(2): 97 - 108. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. D. Cain, L. C. Boles, J. H. Wang, and K. J. Lohmann Magnetic Orientation and Navigation in Marine Turtles, Lobsters, and Molluscs: Concepts and Conundrums Integr. Comp. Biol., June 1, 2005; 45(3): 539 - 546. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. H. Wang, S. D. Cain, and K. J. Lohmann Identifiable neurons inhibited by Earth-strength magnetic stimuli in the mollusc Tritonia diomedea J. Exp. Biol., February 22, 2004; 207(6): 1043 - 1049. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. H. Wang, S. D. Cain, and K. J. Lohmann Identification of magnetically responsive neurons in the marine mollusc Tritonia diomedea J. Exp. Biol., March 2, 2003; 206(2): 381 - 388. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. O. Dennis Willows Costs and Benefits of Opisthobranch Swimming and Neurobehavioral Mechanisms Integr. Comp. Biol., August 1, 2001; 41(4): 943 - 951. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
I. Popescu and A. Willows Sources of magnetic sensory input to identified neurons active during crawling in the marine mollusc Tritonia diomedea J. Exp. Biol., January 11, 1999; 202(21): 3029 - 3036. [Abstract] [PDF]
|
|
