Cutler, who was not playing well prior to suffering the concussion, took a hard hit to the head late in the second quarter but remained in the game until the intermission. He did not return in the second half as Jason Campbell took over.
Smith did say that Cutler's concussion symptoms started to clear up during the second half and that the quarterback wanted to go back in, but "that decision was made for him" by the team doctors.
Smith said he didn't know which hit that Cutler took might have caused the concussion, and said he didn't know what concussion symptoms were present.
"I try not to be Dr. Smith too often," said Smith, adding that he accepted what he was told by the doctors.
Houston improved to 8-1, while the Bears fell to 7-2.
"You can't make the mistakes we did early on,"
"We're disappointed right now with the loss, but we have to get back up as soon as we possibly can."
Asked what he took away from the game, Smith said, "It's a loss, so you have to go from there. We were beaten by a good football team. We're 7-2, though. It's one game. ... There's a lot of football left to go. We'll bounce back."
Campbell replaced Cutler, who took a big hit from Texans linebacker
Gould tried to bring the Bears to within a point early in the final quarter, but missed a 48-yard field goal attempt that caromed off the left upright with 11:40 left after the Bears had driven to the Houston 30.
Campbell was unable to direct another scoring threat and finished 11-for-19 for 94 yards.
"It was tough," Campbell said. "Tonight was my first reps since the season started. If I have to play (next week at San Francisco), then of course, during the week, I'll get those practice reps and get the guys used to (having) me as the quarterback."
The Bears trailed at the break after accumulating a mere 99 total yards of offense. Cutler completed 7 of 14 first-half passes for 36 yards. He was intercepted twice and had a passer rating of 16.7.
Cutler did manage to run for 37 yards in the first half to lead the Bears’ rushing game.
The Bears turned the ball over on their first play from scrimmage when
The Bears also turned the ball over on their next possession when
The Bears got the ball back when
On second down, however, Cutler's deep pass intended for Davis was intercepted by Manning at the Houston 5.