FIGURE 4.

The stimulatory effect of Glutamate Vs. NMDA on [³H] ‐NE release in young rat cortical brain slices. In (a), the concentrations‐response curves of glutamate and NMDA‐stimulated [³H] ‐NE releases in the cerebral cortex tissue slices from young rats (n = 4). In (b), the 1 mM glutamate and NMDA stimulated NE release in the presence and absence of 1.2 mM magnesium in the cerebral cortex tissue slices from young rats (n = 3). Data were analyzed using an unpaired t‐test. *p ≤ 0.05, **p ≤ 0.01 NE, norepinephrine; Glu, glutamate; NMDA, N‐methyl‐d‐aspartate; Mg²⁺, magnesium.