GARY Holterman was 27 when a diabetic coma caused permanent brain injury.

Now aged 32, he’s in his fourth aged care home because, according to his mother Margaret, staff aren’t trained to deal with brain injuries.

“My son has been in an advanced dementia ward with people aged 80, 90 waiting to die – and he’s 32,” she told AAP.

Ms Holterman says her son can’t tell her where he’d like to live but his situation is “desperate” now that he’s developed epilepsy and dementia.

Advocates for people like Gary in aged residential care converged on NSW parliament house on Tuesday to hand over 14,500 signatures and a submission on improving conditions for young people in residential care.

Read more on the news.com.au website.