Bito L Z
Science. 1969 Jul 4;165(3888):81-3. doi: 10.1126/science.165.3888.81.
The concentration gradients of Mg(++) and K(+) in the cerebrospinal fluid system indicate that the (Mg(++)) is higher and the (K(+)) is lower in the extra-cellular fluid of the cerebral cortex than the concentrations of these cations in either plasma-dialysate or cisternal fluid. Such cation distribution demonstrates the existence of an active transport process across the blood-brain barrier.
脑脊液系统中镁离子（Mg(++)）和钾离子（K(+)）的浓度梯度表明，大脑皮质细胞外液中镁离子（Mg(++)）浓度高于血浆透析液或脑池液中这些阳离子的浓度，而钾离子（K(+)）浓度则低于血浆透析液或脑池液中这些阳离子的浓度。这种阳离子分布表明存在一种跨越血脑屏障的主动转运过程。
