Differences in cerebral morphology in 2 stocks of mutant mice heterozygous for the loop-tail (Lp)-gene.

Adult loop-tail heterozygotes (Lp/+) from a stock of Lp-mice which consistently fail to show head wobbling exhibit normal brain morphology with respect to size and shape of lateral ventricles and nearby nuclei. Loop-tail heterozygotes from a head wobbling stock of Lp-mice show enlargement and deformity of the lateral ventricles.