Primary Motor and Sensory Cortex Activation during Motor Performance and Motor Imagery: A Functional Magnetic Resonance Imaging Study
Open accessAbstract
The intensity and spatial distribution of functional activation in the left precentral and postcentral gyri during actual motor performance (MP) and mental representation [motor imagery (MI)] of self-paced finger-to-thumb opposition movements of the dominant hand were investigated in fourteen right-handed volunteers by functional magnetic resonance imaging (fMRI) techniques. Significant increases in mean normalized fMRI signal intensities over values obtained during the control (visual imagery) tasks were found in a region including the anterior bank and crown of the central sulcus, the presumed site of the primary motor cortex, during both MP (mean percentage increase, 2.1%) and MI (0.8%). In the anterior portion of the precentral gyrus and the postcentral gyrus, mean functional activity levels were also increased during both conditions (MP, 1.7 and 1.2%; MI, 0.6 and 0.4%, respectively). To locate activated foci during MI, MP, or both conditions, the time course of the signal intensities of pixels lying in the precentral or postcentral gyrus was plotted against single-step or double-step waveforms, where the steps of the waveform corresponded to different tasks. Pixels significantly (r > 0.7) activated during both MP and MI were identified in each region in the majority of subjects; percentage increases in signal intensity during MI were on average 30% as great as increases during MP. The pixels activated during both MP and MI appear to represent a large fraction of the whol…
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Motor imagery engages a parietal-frontal circuit known to support motor control.
“a parietal–frontal network that mediates motor control is activated during motor imagery (Porro et al., 1996, 2000; Deiber et al., 1998; Lotze et al., 1999; Gerardin et al., 2000; Ehrsson et al., 2003; Hanakawa et al., 2003; Dechent et al., 2004; Meister et al., 2004)”
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From β2-Nicotinic Acetylcholine Receptor Availability During Acute and Prolonged Abstinence From Tobacco Smoking (2009) · cites this paper as [66]
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- Authors
- Porro, C. A., Francescato, M. P., Cettolo, V., Diamond, M. E., Baraldi, P., Zuiani, C., Bazzocchi, M., & di Prampero, P. E.
- Affiliations
- University of Udine (IT)
- University of Modena and Reggio Emilia (IT)
- ORCID
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 1996-12-01
- Volume
- 16
- Issue
- 23
- Pages
- 7688-7698
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6579073
- OpenAlex
- W2168512521
- Cited by
- 924
- References
- 1
- Citations by year
- 2026: 22 · 2025: 24 · 2024: 22 · 2023: 56 · 2022: 21 · 2021: 21 · 2020: 32 · 2019: 34 · 2018: 35 · 2017: 34 · 2016: 36 · 2015: 45 · 2014: 45 · 2013: 34 · 2012: 32
- FWCI
- 7.36
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- SDL (submittedVersion)
- Institutional Research Information System (University of Udine) (submittedVersion)
- IRIS UNIMORE (University of Modena and Reggio Emilia) (submittedVersion, cc-by)
- Funders
- Consiglio Nazionale delle Ricerche
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
- Social Sciences › Psychology › Social Psychology › Action Observation and Synchronization
- Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
- Keywords
- motor imagery, motor performance, primary motor cortex, primary somatosensory cortex, central sulcus, precentral gyrus, postcentral gyrus, visual imagery, self-paced movement
- MeSH terms
- Adult, Brain Mapping, Female, Humans, Imagination, Magnetic Resonance Imaging, Male, Motor Activity, Motor Cortex, Somatosensory Cortex
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