The 23-year-old was the matchwinner on Friday night as the Tynecastle club defeated Arbroath 1-0 win at Gayfield.
Wighton’s fourth of the season saw him run on to a pass from Michael Smith before nonchalantly lofting the ball over goalkeeper Derek Gaston.
It was a moment which “delighted” Neilson who brought the forward on to replace Josh Ginnelly.
The Hearts boss noted that the player is finally over a serious injury which kept the player out of most of the 2017/18 season prior to moving to Tynecastle.
“He's come back a different player,” Neilson said. “To his credit, in lockdown he worked really hard.
"Also, he was out with a cruciate injury. Even when you come back to so called full fitness it can take you a year to 18 months to feel back at it again.
"I think we are seeing that again, the confidence, the belief in his body.”