PSP can be difficult
to diagnose. There is no specific test
to confirm its presence – the only conclusive evidence is by post-mortem
examination of the brain which reveals the neuro fibrillary tangles of the
‘tau’ protein. An MRI scan may show some
degeneration but cannot accurately distinguish from other similar neurological
conditions.
A specialist doctor,
usually a neurologist, (or a geriatrician with knowledge of PSP) will make
careful observations over a period of time in order to reach an accurate
diagnosis, often two or three years from onset.
This lengthy diagnosis period can be frustrating for both individual and
neurologist, but research into more accurate diagnostic markers using brain
scanning techniques is under way.
Diagnosis is usually
based on the following features being present:
-
cramped handwriting
-
a
progressive disorder with unexplained, early falls
-
slowness
of thought
-
difficulties
with gazing up and down, as well as neck stiffness
-
poor
response to Parkinson’s medications.
