Thank you for posting your query.
These findings refer to findings of a metabolic scan of brain, most likely SPECT scan. You have only given a part of study here. This looks like a comparison of metabolic activity of brain of head injury
patients, with that of normal brain.
The study has shown that metabolic activity is reduced in brains of head injured patients, when compared to that of normal brains.
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist