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Profile image of Hirofumi Morishita

    Hirofumi Morishita, MD, PhD

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    Mechanisms driving critical period circuit development are well described in sensory cortex—but poorly characterized for prefrontal cortex dependent cognitive behaviors. A second major goal of our research is to examine the molecular and circuit mechanisms to prefrontal cortex maturation to establish proper cognitive behavior. We combine in vivo circuit-specific manipulation/monitoring of neural activity and gene expression in behaving mice using a translationally-relevant touchscreen behavioral testing. We recently found that frontal top-down cortico-cortical neurons projecting to visual cortex, which are preferentially recruited after errors to adjust attentional behavior (Neuron 2021), undergo activity-dependent integration of local inputs during adolescence sensitive period (Nature Communications 2020), followed by nicotinic signaling-dependent shift in local and long-range input balance to establish proper attentional behavior in adulthood (Science Advances 2021). Identified circuit-associated mechanisms would promote translation of our basic research findings to clinical research to improve diagnosis, prevention and treatment of neuro-developmental disorders. Currently supported by NIMH R01.