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FOCAL CEREBRAL HYPOPERFUSION IN DEVELOPMENTAL DYSPHASIA. EMISSION COMPUTERIZED TOMOGRAPHY OF INHALED 133‐XENON IN CHILDREN.

Developmental language disorder is common: 3% of prechoolers were found to be language impaired (1). The impact on subsequent social and intellectual development is profound ( 2 ) . In spite of the magnitude of the problem, our knowledge on the patho-physiology is marginal. Emission computerized tomography ( 3 ) is a potent, non invasive tool capable of defining regions with low cerebral blood flow (CBF), and, hense, low neuronal activity. We have applied this technique to a group of five children with varying degree of developmental expressive dysphasia without an obvious history of brain injury.