PubMed · 14775954
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W SMITH. 1950-09-01. Procedure in visual training.. https://pubmed.ncbi.nlm.nih.gov/14775954/
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Visually impaired children show difficulties in recognizing their own bodies, objects around then and the spatial parameters that are essential for independent movement. This study analyzes the neuro-psychomotor development of a group of congenitally visually impaired children as compared to children with normal sight. We have evaluated two groups of seven-year-olds by means of neurological evolution examination (NEE). The group studied comprised 20 blind children and the control group comprised 20 children with normal sight, and they were paired up according to age and gender. In some tests, the blind children were guided by touch. The visually impaired children performed worse in tests evaluating balance and appendage coordination compared to normal sighted children (p< 0.001), and this suggests that visual deficiency impairs children's neuro-psychomotor development.
Secreted Wnt proteins trigger the intracellular Wnt signaling cascade upon engagement of dedicated Frizzled-Lrp receptor complexes. Unexpectedly, a non-Wnt ligand for this receptor complex has now been discovered. This novel ligand, Norrin, is mutated in the hereditary ocular Norrie syndrome.
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