In Neurological terms, a Plastic Brain means that the brain is capable of re-wiring itself.
Neurologists study which areas of the brain carry out which functions of the body.
They see the body as a function of the brain with specific parts of the brain operating specific parts of the body.
A Plastic Brain is able to re-wire itself to carry out a function that was previously processed by a part of the brain that has become damaged.
The plasticity of a brain is limited only by the belief in how pliable or self-healing the brain is capable of being.
My brain is capable of whatever I believe it to be capable of.
It is similar to a computer’s hard drive.
When a computer programme becomes corrupt on my hard drive, I have to download a new programme onto a different part of the hard drive and restore normal functioning.
What brain science is currently calling a Plastic Brain may better be described as a Silicon Brain.
Ultimately there is no such thing as a damaged Mind, just corrupt beliefs and programmes.