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The Neurohormone Serotonin Modulates the Performance of a Mechnosensory Neuron During Tail Positioning in the Crayfish

Tsai, Hsing-Ju
http://rave.ohiolink.edu/etdc/view?acc_num=case1246851148

Abstract Details

2009, Master of Sciences, Case Western Reserve University, Biology.
Neurohormones are known to provide adaptive flexibility in animal behavior. The type 1 sensory neuron (SR1) in the crayfish abdominal muscle receptor organ is thought to function in slow postural abdominal positioning. I tested the hypothesis that SR1 responds differently to serotonin depending upon the movement performed. The SR1 threshold response, its adaptation rate, and its dynamic range are influenced by serotonin. During cyclical abdominal movements that mimic swimming, the SR1 firing frequency is higher and the adaptation rate is lower than during sustained abdominal stretches. Generally, the response of a crayfish to the modulator serotonin depends upon its social status. Our preliminary data indicate that without serotonin, the dynamic range of SR1 suggests higher sensitivity to changes in abdominal position for socially isolated crayfish versus those with social experience. With serotonin, SR1 threshold properties appear to be different for subordinate crayfish and similar between dominants and isolates.
Debra Wood, PhD (Committee Chair)
Roy Ritzmann, PhD (Committee Member)
Mark Willis, PhD (Committee Member)
Emmitt Jolly, PhD (Committee Member)
SR1; 5-HT; CRAYFISH; firing frequency; stretches

Recommended Citations

Citations

  • Tsai, H.-J. (2009). The Neurohormone Serotonin Modulates the Performance of a Mechnosensory Neuron During Tail Positioning in the Crayfish [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1246851148

    APA Style (7th edition)

  • Tsai, Hsing-Ju. The Neurohormone Serotonin Modulates the Performance of a Mechnosensory Neuron During Tail Positioning in the Crayfish. 2009. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1246851148.

    MLA Style (8th edition)

  • Tsai, Hsing-Ju. "The Neurohormone Serotonin Modulates the Performance of a Mechnosensory Neuron During Tail Positioning in the Crayfish." Master's thesis, Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1246851148

    Chicago Manual of Style (17th edition)

case1246851148
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© 2009, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.