Dementors and Memory Charms(specifically Neville's)

[RSFJenny19 at aol.com]

No: HPFGUIDX 55077

As I was just rereading the trip to Hogwarts in PoA, something interesting 
caught my eye and made me wonder this: 
Dementors leave you with your worst memories, but what if you'd been the 
recipient of a Memory Charm?  Would you then be left with those memories?  
And when the dementor left, would you remember?  
The reason this came to mind is because on the Hogwarts Express when the 
Dementor comes into the compartment with Harry, Hermione, Ron, Ginny, 
Neville, and Lupin, three of them seem to be affected more than others.  
Obviously, Harry was affected, as we know that for Ginny it must've brought 
back the CoS memories, but Neville also looked very pale and spoke in a voice 
higher than usual.  Ron is only described as being uncomfortable and scared , 
and Hermione only shows anxiety over Harry.  This makes me wonder what 
Neville experienced when the dementor came in, working on the theory that 
he'd been the recipient of a Memory Charm...  

~Jenny