The Wizard spell Strangling Hair has the listed duration "concentration, up to 1 round/level", but later on in the spell it states that "your hair continues to attack that target independently of your own actions."
This to me sounds like you can take other actions while your hair does its thing on your chosen target. It also says it keeps going on the same target unless you explicitly spend a move action on directing it otherwise. This is very similar to Aqueous Orb, which stays churning in place (doesn't dissolve) until you spend a move action to direct it elsewhere. You can still take other actions during Aqueous Orb with no problem.
Can you still take other standard actions during this spell?
I think this may be an incorrectly written duration since it really, really sucks for a level 3 spell if it requires concentration. It is pretty good if not, but not overpowered.