Bouncy little ballerina wants you to know her hidden brain condition

Five-year-old Brisbane ballerina Karina is on a mission to raise awareness for a rare brain disorder.

She loves her ballet, bicycle and her favourite colours are pink and purple – and you wouldn't pick that she suffers from the same condition.

She has isolated agenesis of the corpus callosum – an extremely rare condition many don't know they have until they're adults.

It means the part of the brain linking the left and right hemispheres is missing.

Professor Linda Richards from the Queensland Brain Institute said it was a "super-highway" that carried information around the brain.

"So you've got normal intelligence, but it takes a little bit longer for your brain to process what's going on."

But early intervention to encourage mental and physical development does help.

And with assistance from the NDIS, Karina's parents are able to give her every therapy she needs to live a happy and independent life.

Tomorrow, July 2, is Disorders Of The Corpus Callosum Awareness Day – the middle day of the year, representing the middle of the brain.

AusDocc is the international organisation dedicated to the disorder.

And Karina is doing her part, with her drawings featuring on the organisation's birthday cards.

Along with temporary tattoos, they're available on the AusDocc website.