Related Experiment Videos
Neuroanatomical discrimination between manipulating and maintaining processes involved in verbal working memory; a
T Tsukiura1, T Fujii, T Takahashi
1Molecular and Cellular Neuroscience Section, Supermolecular Science Division, Electrotechnical Laboratory, Tsukuba, Japan. tsukiura@mail.cc.tohoku.ac.jp
Brain Research. Cognitive Brain Research
|March 10, 2001
Summary
Functional magnetic resonance imaging (fMRI) reveals distinct brain regions for verbal working memory maintenance and manipulation. These processes activate specific and overlapping neural areas, differing in their combination patterns.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Verbal working memory involves distinct processes like maintenance and manipulation.
- Understanding the neural underpinnings of these processes is crucial for cognitive neuroscience.
Purpose of the Study:
- To investigate the neural correlates of maintenance and manipulation in verbal working memory using fMRI.
- To differentiate brain regions associated with each process and identify common areas.
Main Methods:
- Employed functional magnetic resonance imaging (fMRI) with tasks including a revised lag 1 digit span, digit span, and number detection.
- Analyzed brain activity in specific regions like the precentral gyrus, frontal gyri, and parietal lobules.
- Calculated correlation coefficients among activated areas based on signal percent change.
Main Results:
- Manipulation-specific activity was found in the right middle and left precentral gyrus.
- Maintenance-specific activity was observed in the right middle and medial frontal gyri, right inferior parietal lobule, and left inferior frontal gyrus.
- Process-nonspecific areas common to both were identified in the right inferior frontal gyrus and left superior parietal lobule.
Conclusions:
- Verbal working memory maintenance and manipulation engage distinct, yet overlapping, neural substrates.
- The distinct patterns of activation and their combinations differentiate these two core cognitive processes.