
The underlying cause of APD isn't known. Experts debate whether heredity or environment—or both—are responsible for the condition. While the human auditory system is fully developed at birth, auditory pathways don't mature until the age of 10 to 12. Because of this, early influences—such as poor prenatal nutrition, a mother's exposure to cigarettes or alcohol, childhood malnutrition, and chronic ear infections—may negatively affect auditory processing. Premature birth, low birth weight, Lyme disease or other brain infections, closed head injury, and exposure to low levels of heavy metals (lead or mercury) may also play a role. The good news is that, because the auditory pathways continue to develop up until adolescence, APD is responsive to early intervention.
1. sound discrimination problems. Children with APD may not speak clearly or run words together or drop endings off of words. Their reading and spelling abilities may also be impacted.
2. auditory memory problems. This part of the disorder makes it hard to memorize numbers and facts. It takes these children longer to learn their addresses and phone numbers. Verbal directions, especially multi-step directions can be very challenging.
3. language processing problems. This condition causes a child not to be able to keep up and understand what is going on in a conversation. The child has trouble listening to verbal information, retelling stories or keeping up with conversations. This condition impacts the child socially as well.
Christina suffered from all three elements of APD. She never sang as a small child, even though she clearly enjoyed listening to music and to others' singing. "Christina could never put everything together—the words, the rhythms, the tunes," says her mother, Tricia. "Her hearing was fine—exceptional. But put her into a circle of kids singing nursery rhymes and playing spoons and tambourines, and all she wanted was to get away!"
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