Spastic Paraplegia, HereditaryParaplegiaParaparesis, SpasticPedigreeAdenosine TriphosphatasesGenes, DominantGenes, RecessiveMuscle SpasticityParaparesis, Tropical SpasticAdaptor Protein Complex 4Agenesis of Corpus CallosumMutationGenetic HeterogeneityVesicle-Associated Membrane Protein 1Spinal Cord IschemiaChromosomes, Human, Pair 2PhenotypeLod ScoreATP-Dependent ProteasesMutation, MissenseCerebral PalsyAge of OnsetQuadriplegiaGTP PhosphohydrolasesDNA Mutational AnalysisMicrotubulesAxonsMetalloendopeptidasesSpinal CordMotor NeuronsSpinal Cord InjuriesGenetic LinkageHeterozygoteCorpus CallosumChromosome MappingTuberculosis, SpinalParaparesisAortic Aneurysm, ThoracicMembrane ProteinsSpinal Cord CompressionFrameshift MutationEndosomesMagnetic Resonance Imaging