What are the long-term side effects of a concussion?

What are the long-term side effects of a concussion?
Persistent post-concussive symptoms include:

Headaches.
Dizziness.
Fatigue.
Irritability.
Anxiety.
Insomnia.
Loss of concentration and memory.
Ringing in the ears.

Persistent post-concussive symptoms include:
  • Headaches.
  • Dizziness.
  • Fatigue.
  • Irritability.
  • Anxiety.
  • Insomnia.
  • Loss of concentration and memory.
  • Ringing in the ears.
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