This looks like an interesting study using fMRI repetition suppression methods to identify neural networks involved in spoken word recognition. It appears such effects were found bilaterally in the superior temporal gyrus. Worth a close look!
Spoken Word Memory Traces within the Human Auditory Cortex Revealed by Repetition Priming and Functional Magnetic Resonance Imaging
Pierre Gagnepain, Gael Chetelat, Brigitte Landeau, Jacques Dayan, Francis Eustache, and Karine Lebreton
J. Neurosci. 2008;28 5281-5289