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  • Title: Drooling in cerebral palsy: hypersalivation or dysfunctional oral motor control?
    Author: Erasmus CE, Van Hulst K, Rotteveel LJ, Jongerius PH, Van Den Hoogen FJ, Roeleveld N, Rotteveel JJ.
    Journal: Dev Med Child Neurol; 2009 Jun; 51(6):454-9. PubMed ID: 19207297.
    Abstract:
    AIM: To investigate whether drooling in children with cerebral palsy (CP) in general and in CP subtypes is due to hypersalivation. METHOD: Saliva was collected from 61 healthy children (30 males, mean age 9y 5mo [SD 11mo]; 31 females, mean age 9y 6mo [1y 2mo]) and 100 children with CP who drooled (57 males, mean age 9y 5mo [3y 11mo], range 3-19y; 43 females, mean age 10y 1mo [4y 9mo], range 4-19y), of whom 53 had spastic, 42 had dyskinetic, and five had ataxic CP. Almost all children were affected bilaterally, and 90 of them were at Gross Motor Function Classification System levels III or higher. The saliva was collected by the swab saliva collection method. The intensity of drooling was evaluated using the drooling quotient. RESULTS: No difference was found in the flow rates, age, or sex between healthy children and children with CP who drooled. On additional subgroup analysis, the flow rates of children with dyskinetic CP differed statistically from those of healthy children (submandibular p=0.047, parotid p=0.040). INTERPRETATION: This study supports the finding in previous studies that no hypersalivation exists in children with CP who drool. Dysfunctional oral motor control seems to be responsible for saliva overflow from the mouth, whereas increased unstimulated salivary flow may occur in children with dyskinetic CP as a result of hyperkinetic oral movements.
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