Related Experiment Videos
Cross-modal temporal order memory for auditory digits and visual locations: an fMRI study
Daren Zhang1, Xiaochu Zhang, Xiwen Sun
1Department of Neurobiology and Biophysics, University of Science and Technology of China, Hefei, Anhui, People's Republic of China. drzhang@ustc.edu.cn
Human Brain Mapping
|June 18, 2004
Summary
This study used fMRI to investigate how the brain remembers the order of events across different senses. Findings reveal specific brain regions, including the prefrontal cortex, are crucial for cross-modal temporal order memory.
Area of Science:
- Cognitive Neuroscience
- Neuroimaging
Background:
- Working memory is essential for recalling event sequences, often across sensory modalities.
- Understanding the neural basis of cross-modal temporal order memory is crucial for cognitive function.
Purpose of the Study:
- To identify neural correlates of cross-modal temporal order memory.
- To differentiate brain regions involved in cross-modal sequencing versus memory load.
Main Methods:
- Event-related functional magnetic resonance imaging (fMRI) was employed.
- A cross-modal memory task contrasted mixed-order (auditory-visual) recall with within-modality recall.
- Blood oxygenation level-dependent (BOLD) responses were analyzed.
Main Results:
- Bilateral prefrontal, right premotor, temporo-parietal junction (TPJ), and left superior parietal cortices showed increased activation in the mixed-order task.
- Right prefrontal cortex and TPJ were specifically associated with cross-modal order, independent of memory load.
- Some activated areas also responded to increased memory load.
Conclusions:
- The study identifies potential neural substrates for the episodic buffer component of working memory.
- Findings highlight the role of specific prefrontal and temporo-parietal regions in integrating information across sensory modalities for temporal sequencing.