mental block

I couldn't get over the mental block of being carried off the court.

I set up a mental block but he simply swept it aside.

The other minute was spent discovering that the computer system already had a mental block.

Perhaps I'd developed a mental block or just wasn't in the mood.

Or sometimes I seem to run up against a mental block of some kind.

But something had made him forget it, some mental block, perhaps.

He just hadn't been able to; it was like a mental block.

He's just going through some mental blocks, like most players at one time or another.

Ah I think you've got a bit of a mental block against it myself.

He put up a mental block against it just to keep his mind clear.