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Neuro-Developmental Delay is defined by the Institute in Neuro-Physiological Psychology (INPP - www.inpp.org.uk) as the continued presence of a cluster of primitive reflexes above the age of one year and the absence or underdevelopment of postural reflexes above the age of three and a half years. The presence or absence of primitive and postural reflexes at key stages in development provides reliable indicators of central nervous system maturity. Abnormal reflexes have also been documented as playing a part in specific learning difficulties (Fiorentino 1970, Bobath & Bobath 1975, Ayres 1972/3, Bender 1976, Blythe, McGlown 1979, Goddard 1994/96, Wilkinson 1994, Goddard Blythe 1998) and immature behavior.
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