It is an accepted medical fact* that the continued presence of primitive reflexes above the age of six months and the absence or under-development of postural reflexes beyond three and a half years of age are reliable indicators of neurological dysfunction, which can affect both motor and perceptual development.
A series of  standardised neurological tests for abnormal reflexes were carried out on a sample of 54 children who had previously received an independent diagnosis of Dyslexia, to see if neurological dysfunction was a significant factor underlying their Dyslexic symptoms.  Additional tests were carried out to assess oculo-motor functioning, visual-perceptual performance and cerebellar involvement including dysdiadochokinesia to see if other areas related to motor development were also a significant factor in the sample.
Abnormal primitive and postural reflexes were found to be a universal underlying factor in this sample.  A high percentage of the sample also demonstrated difficulties with oculo-motor functioning, visual-perceptual skills and dysdiadochokinesia, suggesting a positive relationship between abnormal reflex activity and immature postural, motor and visual functioning.