Hi,
first of all, Esther is completely right in principle. That's why a lot of PTs now call themselves Neuro-Muscular Physios.

But to offer annother answer to your question:
I am what's called a "Neuro Physiotherapist" here in NZ, as this is the job description. This title is neither defined, nor do we as yet have standards for it. However, the College of PT in NZ is currently working on a definition and "requirements to fulfil" to start introducuing the titel of "Specialist Physiotherapist", as it is common in Britain.

Here, the specialist titel currently only indicates that you have got masses of clinical experience with clients in a particular area (e.g. Neurolgy) and have done a lot of formalised professional development in this area. You might have also done tertiary papers for certificate/ diploma/ degree in Physiotherapy. They offer these for Cardiopulmonary.../ Orthopaedic .../ Manual Therapy .../ Neurological .../ Rehabillitation, but there might be more.

Regards,
Andrea