The goal of this project is to investigate the neurobehavioral mechanisms of acoustic communication, particularly species-specific signal recognition as it pertains to the identification of potential mates, rivals, and predators. Because of the relative simplicity of its acoustic behavior and auditory pathways in the CNS, the cricket is an ideal model system for investigating the problems of auditory physiology that are encountered by any animal that must rely upon auditory signals for communication. These include: (1) how crickets discriminate the mating calls of their own species from those of others-and how the auditory system detects differences in the temporal pattern of mating calls; (2) how crickets (and their auditory systems) discriminates the auditory signals of crickets from those of predators, such as bats; and (3) how the auditory system is hierarchically organized to recognize species-specific signals and how this input is translated into output: adaptive behavioral acts such as phonotaxis. An important advantage of crickets for these aspects of auditory research is that questions (1) - (3) may be studied neurophysiologically and anatomically at the level of a definable network of single, identified neurons. Thus, a cellular analysis of acoustic communication can be combined with previous studies at the behavioral, genetic, and evolutionary levels of organization. The cricket auditory system is also ideal for the study of certain kinds of developmental questions. For example, how does the auditory system respond to loss of an ear? We have found that the effects of deafferentation on the auditory system can be studied in the compensatory growth responses of single, identified interneurons. The compensatory growth of dendrites restores some measure of audition. These studies may provide a convenient cellular model for studying issues of developmental plasticity such as specificity in synaptogenesis, synaptic competition, and sensory regeneration.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS011630-13
Application #
3394534
Study Section
Hearing Research Study Section (HAR)
Project Start
1977-09-01
Project End
1986-08-31
Budget Start
1985-09-01
Budget End
1986-08-31
Support Year
13
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Cornell University
Department
Type
Schools of Arts and Sciences
DUNS #
City
Ithaca
State
NY
Country
United States
Zip Code
14850
Yager, D D (1996) Nymphal development of the auditory system in the praying mantis Hierodula membranacea Burmeister (Dictyoptera, Mantidae). J Comp Neurol 364:199-210
Yager, D D (1996) Serially homologous ears perform frequency range fractionation in the praying mantis, Creobroter (Mantodea, Hymenopodidae). J Comp Physiol A 178:463-75
Miles, C I; May, M L; Holbrook, E H et al. (1992) Multisegmental analyses of acoustic startle in the flying cricket (Teleogryllus oceanicus): kinematics and electromyography. J Exp Biol 169:19-36
May, M L; Hoy, R R (1991) Habituation of the ultrasound-induced acoustic startle response in flying crickets. J Exp Biol 159:489-99
Yager, D D; May, M L; Fenton, M B (1990) Ultrasound-triggered, flight-gated evasive maneuvers in the praying mantis Parasphendale agrionina. I. Free flight. J Exp Biol 152:17-39
Yager, D D; May, M L (1990) Ultrasound-triggered, flight-gated evasive maneuvers in the praying mantis Parasphendale agrionina. II. Tethered flight. J Exp Biol 152:41-58
May, M L; Hoy, R R (1990) Ultrasound-induced yaw movements in the flying Australian field cricket (Teleogryllus oceanicus). J Exp Biol 149:177-89
Brodfuehrer, P D; Hoy, R R (1990) Ultrasound sensitive neurons in the cricket brain. J Comp Physiol A 166:651-62
Yager, D D; Hoy, R R (1989) Audition in the praying mantis, Mantis religiosa L.: identification of an interneuron mediating ultrasonic hearing. J Comp Physiol A 165:471-93
Brodfuehrer, P D; Hoy, R R (1989) Integration of ultrasound and flight inputs on descending neurons in the cricket brain. J Exp Biol 145:157-71

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