Anastasia,
From what I have gathered there are some differences in terminology between the USA and Australia. The term PBP in Australia seems to be reserved only for patients who present with bulbar symptoms but there is no effect on the other parts of the brain. As soon as other areas are affected they move to a more general term -
ALS.
Both PBP and
ALS here are considered types of
MND. In the USA the term
MND doesn't seem to be used as much.
In most cases patients with bulbar symptoms develop
ALS. My mother is a good exampe of what they might find with your Partner. My mother has only bulbar symptoms - fatigue, speech and swallowing are affected, plus emotional lability. If her symptoms remained in these same areas then as I understand it that would be referred to by her doctors as PBP. However the electrical tests and nerve conduction tests showed that she has affected neurons in other parts of her brain. Even though she can't feel anything yet in her limbs or stomach or back, other parts of her body are affected and this shows up on those test results. In fact the
MND doctor-guru in Sydney told her that until you lose 70% of your function you don't feel it.
So because Mum has lost function in those other areas (even though she doesn't feel anything herself) she is considered to have
ALS (with bulbar onset), not PBP.
What is the benefit of knowing this? Well she can educate herself about support services that she doesnn't need right now, but she will need in the future, such as Occupational Therapy. There are disabled parking permits that she can apply for, there are implications for superannuation and other things . . . she can get organised and ready for the time when her limbs are not as strong as they are now and she can't get about so much.
This has already been important in making a decision about her eyesight - which has nothing to do with her
MND. Deciding whether to have a particular treatment versus continuing to use glasses. The eye doctor pointed out that relying on glasses might not be such a good idea as putting them on and taking them off could become difficult in the future. If she had PBP it wouldn't be an issue, but knowing that she has
ALS has altered the decision criteria.
I hope I haven't confused you even further.
sesl