Concussions are sometimes graded on the severity of their symptoms:
grade 0: headache and difficulty concentrating
grade 1: headache, difficulty concentrating, and a dazed feeling for less than a minute
grade 2: grade 1 symptoms, with a longer period of feeling dazed, possibly accompanied by dizziness, confusion, amnesia, ringing in the ears, and irritability
grade 3: loss of consciousness for less than a minute
grade 4: loss of consciousness for longer than a minute
Returning to very limited activities following a grade 0 or 1 concussion may be allowable within a day or two. A grade 2 headache may require a few days of rest. A grade 3 or 4 concussion will mean at least a few weeks of recovery time. Regardless of the severity of your concussion, you should be symptom-free before returning to normal activity, and your condition should be carefully monitored by your doctor.
Dixon is back in Adelaide. He was out at Gauchos with the 1st and 2nd year boys the other night. Looks like he bought them all dinner. Might've lost a bet with Butters.
Dixon took some pics while on his adventure to go race his car, his right ankle was free of strapping, but looked clearly swollen next to his other leg. Hopefully though within the next week he'll be trying to run again though and seeing how it goes.
I'd still hope if all goes well that he could be back after the bye, but thats probably a stretch.