Researchers from the University of California, Los Angeles, have found more evidence that methamphetamine abuse may cause alterations in the brain. The researchers used a highly sensitive technique called quantitative electroencephalography (QEEG) to assess electrical activity in the brain, or brainwaves, of recently abstinent methamphetamine abusers and nonusers. Excess amounts of slow brainwavesdelta and thetahave been associated with head injuries and memory problems.
For the study, Dr. Thomas Newton and colleagues recruited methamphetamine users who reported using at least one-half gram of the drug per week for the previous 6 months. After four days of methamphetamine abstinence, the researchers obtained QEEG recordings of the users brains. The scientists also obtained QEEG recordings from healthy nonusers. The researchers found that methamphetamine users had increased delta and theta brainwave activity compared to nonusers.
This study, funded by NIDA, was published in the March 2003 issue of the journal, Clinical Neurophysiology.
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Source: NIDA NewsScan