1 He has retrograde amnesia, acute psychological suppression.

2 Retrograde amnesia can be caused by Alzheimer's disease, traumatic brain injury (ask an NFL player), thiamine deficiency or other insults.

3 To study the effect of ketamine on patients retrograde amnesia and implicit memory.

4 Sometimes, people also experience transient retrograde amnesia, forgetting some portion of their previous memories.

5 Anterograde amnesia and minimal retrograde amnesia with thalamic and hippocampal lesions in neuro-Behcet's disease is rare.

6 Results Retrograde amnesia was observed in test animals 24 hours after concussion , 48 and 72 hours after concu.

7 There were no further seizure attacks and the retrograde amnesia improved gradual 1 yduring two months of follow - up.

8 Results: All the patients had anterograde amnesia in different degree, and some cases had retrograde amnesia.

9 Reed, J. M. , and L. R. Squire. " Retrograde Amnesia for Facts and Events: Findings from Four New Cases. " J. Neurosci 18 (1998): 3943-54.