Heading is a critical part of any soccer game but scientists are worried about how it could damage young kid's memories.

To research these effects scientists created an app to study it.

The new app looks at cognitive function in soccer players and young adults in non-contact sports.

The findings showed that soccer players had minor traumatic brain injuries.

"So very small 30- to 50-millisecond changes to their response specifically to tasks that require cognitive, but not for more simple tasks," said Anne Sereno, neuroscientist.

More research would be needed to determine if those slight changes were long lasting.