direct infusion of the alpha 1-adrenergic agonists , d-amphetamine or phenylephrine . into the subarachnoid space of the lumbar cord ( intrathecal administration ) increased the amplitude of the acoustic startle reflex , the magnitude of this behavioral facilitation correlated highly with the degree of alpha 1-adrenoceptor occupation measured by [ 3h ] prazosin binding in lumbar spinal tissue .
C1373109
alpha 1-adrenergic
C0031469
phenylephrine