Highlights
- Examined drug effects of tobacco, marijuana and combined marijuana + nicotine use.
- Hippocampal volumes were smaller in marijuana users (with or without nicotine).
- Abnormal brain-behavior relationships in combined marijuana + nicotineusers.
Abstract
Combined use of marijuana (MJ) and tobacco is highly prevalent in today’s population. Individual use of either substance is linked to structural brain changes and altered cognitive function, especially with consistent reports of hippocampal volume deficits and poorer memory performance. However, the combined effects of MJ and...