Depending on the context and the speed of elocution, these inflections may correspond to a pause, which implies a silence and, normally, the end of the sentence, or a semi-pause, which implies an intonation change in the same sentence.
the CHILDES database (MacWhinney, 2000) or the Alborada corpus (Saz et al., 2010) have recordings of people with different typologies of intellectual disability, but, these corpora don't focus on prosody.