A group of newborn infants born during the second half of gestation were studied for the fatty acid composition of EPG and CPG in the cerebellar tissue. The fatty acid pattern of EPG and CPG were analyzed by GLC and the results compared with those found in cerebrum and with other parameters previously studied in cerebellum /total lipid P and gangliosides/. They included the ratios n36, 22:4 n6/22:5n6, 22:4n6+22:5nb/20:4n6 and 18:0/18:1n9. The overall changes were slighter than those found in the cerebral tissue but the parabolic profile of some parameters was clearer in cerebellum than in cerebrum. As the descending part of the curve was longer in cerebellar tissue than in cerebrum, the differences between cases with quite extreme gestational ages were smaller in cerebellum than in cerebrum. The selection criterion of the cases and the storage of the material were the same described in other papers.
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