5. Conclusion
In conclusion, we found that processing object relative clause causes
more widespread activity in the prefrontal cortex compared to processing
subject relative clauses. Furthermore, the activity in the left DLPFC,
partially including Broca’s area, and right DLPFC was significantly
greater in ORC than in SRC condition. Our findings show that processing
ORCs is more difficult and require greater cognitive resources than
processing SRCs in Turkish, thus refuting the head-directionality based
explanations suggested for relative clause processing differences. The
present study also demonstrates that behavioral measurements might not
be conclusive and should be coupled with a neuroimaging or an
electrophysiological method, if possible.