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. 2011 Sep-Oct;43(5):502–506. doi: 10.4103/0253-7613.84950

Figure 2.

Figure 2

The factors and conditions which are reported to modulate the blood brain barrier (BBB) and make it leaky or subject to rupture allowing circulation norepinephrine (NE) to access the alpha-1 adrenergic receptors located within the brain in addition to local release of NE in the brain. IL-6 = interlukin-6; BP = blood pressure; SNA = sympathetic neural activity