Florida State University

Dr. Michael Meredith

Biological Science


Sensory physiology and brain circuits involved in chemosensory communication, including pheromones, studied by electrophysiological, anatomical and behavioral methods.
Current Research
We study female-to-male and male-to-male signaling in golden hamsters and mice as a model to analyze sensory mechanisms, in particular those leading to sensory control of behavior. Expression of immediate-early gene products such as Fos- and FRA-proteins (from the c-fos gene or related genes) are used as markers to indicate which neurons in the brain change activity under different conditions. Direct recording of neuronal electrical activity can also be used in some circumstances. Our primary interest is in understanding the principles of brain-circuit operation and not the development of therapies, but the unlearned recognition of chemosensory social signals that we study involves brain areas and circuits that have also been implicated in failures to recognize visual social signals, such as facial expressions, as in autism.
Recent Publications
Westberry JM, Meredith M. (2016). GABAergic mechanisms contributing to categorical amygdala responses to chemosensory signals. Neuroscience, 186-96. PubMed
Westberry JM, Meredith M. (2016). Characteristic response to chemosensory signals in GABAergic cells of medial amygdala is not driven by main olfactory input. Chem Senses., . PubMed
Liu Y, Lieberwirth C, Jia X, Curtis JT, Meredith M, Wang ZX (2014). Chemosensory cues affect amygdaloid neurogenesis and alter behaviors in the socially monogamous prairie vole. Eur J Neurosci, 1632-41. PubMed
Blake CB, Meredith M (2011). Change in number and activation of androgen receptor-immunoreactive cells in the medial amygdala in response to chemosensory input. Neuroscience, 228-38. PubMed
Samuelsen CL, Meredith M (2011). Oxytocin antagonist disrupts male mouse medial amygdala response to chemical-communication signals. Neuroscience, 96-104. PubMed
Blake CB, Meredith M (2010). Selective enhancement of main olfactory input to the medial amygdala by GnRH. Brain Res, 46-59. PubMed
Moeller JF, Meredith M (2010). Differential co-localization with choline acetyl transferase in nervus terminalis suggests functional differences for GnRH isoforms in bonnethead sharks (Sphyrna tiburo). Brain Res, 44-53. PubMed
Samuelsen CL, Meredith M (2009). The vomeronasal organ is required for the male mouse medial amygdala response to chemical-communication signals, as assessed by immediate early gene expression. Neuroscience, 1468-76. PubMed
Samuelsen CL, Meredith M (2009). Categorization of biologically relevant chemical signals in the medial amygdala. Brain Res, 33-42. PubMed
Nolte CM, Meredith M (2005). mGluR2 activation of medial amygdala input impairs vomeronasal organ-mediated behavior. Physiol Behav, 314-23. PubMed
Meredith M, Westberry JM (2004). Distinctive responses in the medial amygdala to same-species and different-species pheromones. J Neurosci, 5719-25. PubMed
Westberry J, Meredith M (2003). The influence of chemosensory input and gonadotropin releasing hormone on mating behavior circuits in male hamsters. Brain Res, 1-16. PubMed
Meredith M (2001). Human vomeronasal organ function: a critical review of best and worst cases. Chem Senses, 433-45. PubMed

All Publications PubMed

Return to List