I don't think you read my post properly.

I said that chronic infections of the ears can negatively influence sensory development (because they deprive the child of sensory input), and ALSO that the connective tissue problems that are frequent on the Spectrum are linked with higher rates of ear infections. I never stated that sensory problems CAUSE ear infections!  :roll:

The reason why middle ear infections are common on the Spectrum is among other things (alelrgies also seem to be implicated) down to the same cause as the lax joints - connective tissue weakness.

Middle ear infections are caused by bacteria getting trapped in the Eustachian Tubes (which before age 7 are quite narrow, which is why ear infections are much more common before that age) and infection spreading to the middle ear.

The tubes get blocked (and narow tubes as well as tissue problems that cause the tubes not to get drained properly make this possible), the infection builds up and puts pressure on the ear drum from inside.

People with connective tissue problems tend to have weaker tubes that don't get drained properly, and are thus more likely to clog up and trap infections. This is also believed to be behind some of the increased incidences of hayfever and sinus problems, because adequate drainage often prevents infection and can flush out pollen faster.