PMID- 18446348
OWN - NLM
STAT- MEDLINE
DCOM- 20080919
LR  - 20211020
IS  - 0340-7594 (Print)
IS  - 0340-7594 (Linking)
VI  - 194
IP  - 7
DP  - 2008 Jul
TI  - Swim pacemakers in box jellyfish are modulated by the visual input.
PG  - 641-51
LID - 10.1007/s00359-008-0336-0 [doi]
AB  - A major part of the cubozoan central nervous system is situated in the 
      eye-bearing rhopalia. One of the neuronal output channels from the rhopalia 
      carries a swim pacemaker signal, which has a one-to-one relation with the swim 
      contractions of the bell shaped body. Given the advanced visual system of box 
      jellyfish and that the pacemaker signal originates in the vicinity of these eyes, 
      it seems logical to assume that the pacemakers are modified by the visual input. 
      Here, the firing frequency and distribution of inter-signal intervals (ISIs) of 
      single pacemakers are examined in the Caribbean box jellyfish, Tripedalia 
      cystophora. It is shown that the absolute ambient light intensity, if kept 
      constant, has no influence on the signal, but if the intensity changes, it has a 
      major impact on both frequency and ISIs. If the intensity suddenly drops there is 
      an increase in firing frequency, and the ISIs become more homogeneously 
      distributed. A rise in intensity, on the other hand, produces a steep decline in 
      the frequency and makes the ISIs highly variable. These electrophysiological data 
      are correlated with behavioral observations from the natural habitat of the 
      medusae.
FAU - Garm, A
AU  - Garm A
AD  - Department of Cell and Organism Biology, Lund University, Lund, Sweden. 
      anders.garm@cob.lu.se
FAU - Bielecki, J
AU  - Bielecki J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080430
PL  - Germany
TA  - J Comp Physiol A Neuroethol Sens Neural Behav Physiol
JT  - Journal of comparative physiology. A, Neuroethology, sensory, neural, and 
      behavioral physiology
JID - 101141792
SB  - IM
MH  - Action Potentials/physiology
MH  - Analysis of Variance
MH  - Animals
MH  - Behavior, Animal
MH  - Biological Clocks/*physiology
MH  - Cubozoa/*physiology
MH  - Female
MH  - Light
MH  - Male
MH  - Photic Stimulation/methods
MH  - Psychophysics
MH  - *Swimming
MH  - Time Factors
MH  - Vision, Ocular/*physiology
MH  - Visual Pathways/anatomy & histology/*physiology
EDAT- 2008/05/01 09:00
MHDA- 2008/09/20 09:00
CRDT- 2008/05/01 09:00
PHST- 2008/02/18 00:00 [received]
PHST- 2008/04/12 00:00 [accepted]
PHST- 2008/04/11 00:00 [revised]
PHST- 2008/05/01 09:00 [pubmed]
PHST- 2008/09/20 09:00 [medline]
PHST- 2008/05/01 09:00 [entrez]
AID - 10.1007/s00359-008-0336-0 [doi]
PST - ppublish
SO  - J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2008 Jul;194(7):641-51. 
      doi: 10.1007/s00359-008-0336-0. Epub 2008 Apr 30.