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Andrew H. Bass Professor W239 Seeley G. Mudd Hall Cornell University Ithaca, NY 14853 Phone - Office: (607) 254-4372 Fax: (607) 254-1303 Email : ahb3@cornell.edu

Research Interests Research in our laboratory focuses on two projects concerning the central and peripheral nervous systems of sound-producing/ "vocalizing" teleost fishes: (1) Characterization, and hormonal influences on, sex differences in the morphology of single, physiologically-identified neurons. (2) Temporal and spectral encoding of acoustic communication signals. These projects revolve around studies of alternative mating tactics in species wth two male morphs that differ in a large suite of behavioral, neurobiological and neuroendocrine characters including divergent acoustic courtship behaviors and vocal control pathways. We answer questions regarding the existence of behaviors and their underlying mechanisms using a multidisciplinary, neuroethological approach that combines field studies of vocal communication with laboratory studies of the nervous system that utilize one or more of the following approaches: neurophysiology combined with anatomical tract tracing, neuroendocrinology, electron microscopy, immunocytochemistry, and in situ hybridization. Link to Lab Page. Some Recent Bass Lab Publications Remage-Healey, L. H. and A. H. Bass (2007) Plasticity in brain sexuality is revealed by the rapid actions of steroid hormones. The Journal of Neuroscience 27 (4): 1114-1122. Santangelo, N. and A. H. Bass (2006) New insights into neuropeptide modulation of aggression: Field studies in a territorial tropical damselfish. Proceedings of the Royal Society, Series B (London). 273(1605): 3085-3092. Remage-Healey, L. H. and A. H. Bass (2006) From social behaviour to neurons: Rapid modulation of advertisement calling and vocal pattern generators by steroid hormones. Hormones and Behavior 50: 432-441. Kittelberger, J. M., B. R. Land and A. H. Bass (2006) The midbrain periaqueductal gray and vocal patterning in a teleost fish. Journal of Neurophysiology 96:71-85. Lee, J. S. F. and A. H. Bass (2006) Dimorphic male midshipman fish: Reduced sexual selection or sexual selection for reduced characters? Behavioral Ecology 17:670-675. Forlano, P. M. and A. H. Bass (2005) Seasonal plasticity of brain aromatase mRNA expression in glia: divergence across reproductive and vocal phenotypes. Journal of Neurobiology 65, 37-49. Forlano, P. M., D. L. Deitcher, and A. H. Bass (2005) Distribution of estrogen receptor alpha mRNA in the brain and inner ear of a vocal fish with comparisons to sites of aromatase expression. Journal of Comparative Neurology 483, 91-113. Weeg, M. S., B. R. Land and A. H. Bass (2005) Temporal modulation of efferents to the inner ear and lateral line by central vocal pathways. The Journal of Neuroscience 25, 5967-5974. Remage-Healey, L. and Bass, A. H. (2004) Rapid, hierarchical modulation of vocal patterning by steroid hormones. The Journal of Neuroscience 24:5892-5900. Sisneros, J., P. Forlano, D. Deitcher and A. H. Bass (2004) Steroid-dependent auditory plasticity leads to adaptive coupling of sender and receiver. Science 305: 404-407. Bass, A. H. and J. R. McKibben (2003) Neural mechanisms and behaviors for acoustic communication in teleost fish. Progress in Neurobiology 69: 1-26. Sisneros, J. and A. H. Bass (2003) Seasonal plasticity of peripheral auditory tuning. The Journal of Neuroscience 23:1049-1058. Goodson, J. L. and A. H. Bass (2002) Forebrain and midbrain voocal-acoustic complexes: Intraconectivity and descending vocal motor pathways. The Journal of Comparative Neurology 448:298-321. McKibben JR and A. H. Bass (2001) Effects of temporal envelope modulation on acoustic signal recognition in a vocal fish. Journal of the Acoustical Society of America 109: 2934-2943. Bass, A. H., D. A. Bodnar and M.A. Marchaterre (2000) Midbrain acoustic circuitry in a vocalizing fish. The Journal of Comparative Neurology 419: 505-531. Goodson, J. L. and A. H. Bass (2000) Forebrain peptide modulation of sexually polymorphic vocal motor circuitry. Nature 403: 769-772. Popular Press Articles Courses Taught Introduction to Neurobiology; Brain Evolution and Behavior