Every morning the schoolgirl from IL wakes up thinking it is June 11 - the day she was accidentally kicked in the head by a student crowd surfing at a dance.
She additionally makes use of her cellphone to take footage of every thing and units an alarm for each two hours to brush up on any info she might have forgotten.
Schoolgirl Riley Horner wakes up every morning thinking it is June 11, until the calendar on her door tells her otherwise.
"I have a calendar on my door and I look and it's September and I'm like "woah", she told the station.
Riley Horner, 16, was accidentally kicked in the head by a student who was crowd-surfing at a dance during a youth agriculture convention in IL.
Not only does the memory loss cause problems for Riley at school - even minor things like remembering where her locker is located is an hourly battle - but it's taking an extra emotional toll on her family life.
"You can't see a concussion though on an MRI or a CT scan", Horner's mother, Sarah, said.
"They tell us there's nothing medically wrong".
Sarah Horner said her brother died recently, but her daughter "probably has no idea". "And we tell her every day, but she has no idea about it".
Each morning Riley Horner wakes up in her bedroom, her first feeling is confusion.
Riley suffered a traumatic blow to the head which
"I am not okay with that", her mother said.
Doctors say it's a medical mystery and they can't find anything physically wrong with Riley.
She has no recollection of what happened before that day or after. "And I am not okay with that", Horner said tearfully.
"People don't understand - it's like a movie". Everything is more complicated when Riley Horner just can't remember. "I am identical to actually scared".
Doctors told the Horners it's a reality they may have to accept for life.
But as the months have passed, her symptoms haven't improved. We have a few leads, but most are not local, so we are sifting through trying to find the best options. I imply she wished to be within the medical area and now she will be able to't even maintain a job if she wished to, ' Sarah stated.
"I'm very confused and I try to think back and I can't", Riley said.
You can follow the family's journey via Sarah Horner's Facebook page.
"We need help", the mum said.