there are different tests or methods used to determine gpr56 expression or visuals of the brain to analyze the specific sections that are affected. these tests for example, using animals such as mice, rnai, behavioral assay, electron microscopy, ct scan, or mri demonstrate different results that concludes an affected bfpp patient. mri's reveal either irregularity to the cortical surface suggestive of multiple small folds or an irregular, scalloped appearance of the gray matter-white matter junction.