Abstract:Defensive behaviors are critical for animal’s survival. The parabrachial nucleus (PBN) is critical in transmitting danger stimuli to trigger behavioral responses. Here, by viral tracing and electrophysiological recordings, we uncover that cholecystokinin (CCK) neurons in the lateral PB (LPBCCK neurons) are monosynaptic connected with the paraventricular nucleus (PVN) neurons. Selective photoactivation of LPBCCK neurons, their axon terminals within the PVN and glutamatergic neurons in the PVN, trigger defensive… Show more
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