acer to measure blood flow through different areas of the brain, and it was found that there was a significant decrease in the blood flow to the left thalamus, and a lesser decrease in blood flow to the right thalamus. As the patient's memory improved over the next few weeks, so did the blood flow to the thalamus. In this case, at least, transient retrograde amnesia was caused by a decreased blood flow to the thalamus.
Vargha-Khardem, Gadian, Watkins and Connelly et al (1997), studied three children, one of whom suffered brain damage at birth, one at four years, and one at 9 years. Neuropsychological tests were performed to determine memory quotients and intelligence quotients, and neuropathology was assessed using three quantitative magnetic resonance imaging (MRI) techniques: volumetric measurements and T2 relaxometry to detect hippocampal abnormalities, and proton magnetic resonance spectroscopy to detect diffuse temporal lobe abnormalities (37
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