Post-concussion syndrome
About 10% of people with PCS develop sensitivity to light or noise, about 5% experience a decreased sense of taste or smell, and about 14% report blurred vision. People may also have double vision or ringing in the ears, also called tinnitus. PCS may cause insomnia, fatigue, or other problems with sleep.
British Columbia Postconcussion Symptom Inventory
BC-PSI items
For most patients with MTBI the cognitive, psychological, and psychosocial symptoms do not last longer than three to six months.. Those in which the symptoms persist longer may be diagnosed with postconcussion syndrome (Ruff, 2005).
PCS is recognised in International Classification of Diseases, 10th edition (ICD-10;(World Health Organization, 1992) and the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV;(American Psychiatric Association,2000). PCS symptoms may include headaches, dizziness, light and noise sensitivity, nausea, fatigue, sleep disturbance, irritability, temper problems, emotional problems, poor concentration, and memory impairment.