Spastic Paraplegia, HereditaryParaplegiaGenes, RecessiveParaparesis, SpasticPedigreeConsanguinityGenes, DominantMutationAdenosine TriphosphatasesMuscle SpasticityPhenotypeLod ScoreMutation, MissenseDNA Mutational AnalysisGenetic HeterogeneityParaparesis, Tropical SpasticAdaptor Protein Complex 4Genetic LinkageAgenesis of Corpus CallosumChromosomes, Human, Pair 2Chromosome MappingHeterozygoteAge of OnsetPolycystic Kidney, Autosomal RecessiveHomozygote