Michael J. Fox talks life with Parkinson's disease: 'Every day it's tougher'

Back in 1983, Jane Pauley introduced a young Michael J. Fox to the world while promoting his new show, Family Ties. Fast forward 40 years, and the two are catching up again, chatting about Fox's life with Parkinson's disease and how he keeps his spirits up.

CBS Sunday Morning:

"But at some point, Parkinson's gonna make the call for you, isn't it?" asked Pauley.

"Yeah, it's, it's banging on the door. Yeah, I mean, I'm not gonna lie. It's gettin' hard, it's gettin' harder. It's gettin' tougher. Every day it's tougher. But, but that's, that's the way it is. I mean, you know, who do I see about that?"

Despite dealing with Parkinson's for over 30 years, Fox still finds a way to laugh and be grateful. His foundation has raised a whopping $1.5 billion for research and recently announced a game-changing breakthrough: a biomarker for Parkinson's that could lead to faster diagnosis and treatment.

"This changes everything," said Fox. "I know with where we are right now, in five years they will be able to tell if they have it, be able to tell if they're ever gonna get it, we'll know how to treat it."

Previously: Michael J. Fox shares his story in the first trailer for Apple TV's STILL