The name is Transient Ischemic Attack. I had one, not because of the concussion itself but because i was having a chronic subdural hemorrhage and blood was slowly pooling inside my skull. At some point, the pressure exerted on the brain became too much and that's when the attack happened for me. It's called transient because it only happens for a second or so and no permanent ischemia actually takes place (or not that i know of).

The symptoms of a TIA are unambiguous. You'd definitely know something is wrong if you are having one. In my case, i was at home, sitting in the couch ( i had been having headaches for about a week or so) and started feeling like my entire right leg was growing numb, then my chest, then my arm, then my face. Then i felt a sudden shock and remember not being able to talk or say anything coherent. It only lasted for a couple of seconds but it felt like an eternity in which i was trapped inside myself.

I'm probably a wussy but recalling it brings back all sorts of horrid memories to my mind that i'd rather not recall.