List of songs Steve Perry wrote/performed about his mother?

[*Laura]

Perry's Mom died because of a severe neurological illness,which made her incapable of speaking towards the end...Very sad.

Liam,the degenerative bone disease is what SP was diagnosed with.

Was it ALS (Lou Gehrig's)?

That I don't know...I never read or heard any details about the kind of her illness,however I remember reading that Steve was taking her to hospitals to get
CAT scans...That's how those rumors started that he might have throat cancer because he was seen in the Radiology section waiting for his Mom.