REFERENCES
- Schurig V, Orman AV, Bowen P. Nonprogressive cerebellar disorder with mental retardation and autosomal recessive inheritance in Hutterites. Am J Med Genet 1981;9:43–53.
- Tan U. Unertan syndrome; quadrupedality, primitive language, and severe mental retardation; a new theory on the evolution of human mind. NeuroQuantology 2005;4:250–255.
- Ozcelik T, Akarsu N, Uz E, et al. Mutations in the very low-density lipoprotein receptor VLDLR cause cerebellar hypoplasia and quadrupedal locomotion in humans. Proc Natl Acad Sci USA 2008;105:4232–4236.
- Türkmen S, Guo G, Garshasbi M, et al. CA8 mutations cause a novel syndrome characterized by ataxia and mild mental retardation with predisposition to quadrupedal gait. PLoS Genet 2009;5(5):e1000487.
- Gulsuner S, Tekinay AB, Doerschner Ket al. Homozygosity mapping and targeted genomic sequencing reveal the gene responsible for cerebellar hypoplasia and quadrupedal locomotion in a consanguineous kindred. Genome Res 2011;21:1995–2003.
- Tan U. Unertan syndrome: review and report of four new cases. Int J Neurosci 2008;118:211–225.
- Tan U, Pençe S, Yilmaz M, et al. Unertan syndrome in two Turkish families in relation to devolution and emergence of Homo erectus: neurological examination, MRI, and PET scans. Int J Neurosci 2008;118:313–336.
- Glasauer S, Hoshi M, Büttner U. Smooth pursuit in patients with downbeat nystagmus. Ann N Y Acad Sci 2005;1039:532–535.
- Marti S, Bockisch CJ, Straumann D. Prolonged asymmetric smooth-pursuit stimulation leads to downbeat nystagmus in healthy human subjects. Invest Ophthalmol Vis Sci 2005;46:143–149.
- Walker MF, Tian J, Shan X, Ying H, Tamargo RJ, Zee DS. Enhancement of the bias component of downbeat nystagmus after lesions of the nodulus and uvula. Ann N Y Acad Sci 2009;1164:482–485.