Abstract
The cuneiform nucleus (CUN) is a midbrain structure located laterally to the caudal part ofthe periaqueductal gray matter. Hodological studies show that CUN is part of the neuralsystem that integrates anti-predatory defense responses. Importantly, CUN has bothglutamatergic and GABAergic cell bodies. Our laboratory's preliminary findings showed alarge overlap of the CUN glutamatergic a…