Layer-Specific Contributions to Imagined and Executed Hand Movements in Human Primary Motor Cortex
| Autor: | Alex Martin, Jason A. Avery, Laurentius Huber, Elisha P. Merriam, Andrew S. Persichetti |
|---|---|
| Přispěvatelé: | MRI, RS: FPN CN 5 |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male 0301 basic medicine repetition Repetition priming Motor Activity Thumb Vascular space occupancy Biology Hand movements General Biochemistry Genetics and Molecular Biology Young Adult 03 medical and health sciences 0302 clinical medicine Motor imagery medicine Humans vaso Brain Mapping Repetition (rhetorical device) Movement (music) Motor Cortex Cognition Middle Aged suppression Hand Magnetic Resonance Imaging medicine.anatomical_structure 030104 developmental biology FMRI Finger tapping network SYNCHRONIZATION Imagination Female Primary motor cortex Psychology General Agricultural and Biological Sciences Neuroscience Priming (psychology) 030217 neurology & neurosurgery |
| Zdroj: | Current Biology, 30(9), 1721-1725.e3. Cell Press |
| ISSN: | 0960-9822 |
| Popis: | The human ability to imagine motor actions without executing them (i.e., motor imagery) is crucial to a number of cognitive functions, including motor planning and learning, and has been shown to improve response times and accuracy of subsequent motor actions [1, 2]. Although these behavioral findings suggest the possibility that imagined movements directly influence primary motor cortex (M1), how this might occur remains unknown [3]. Here, we use a non-blood-oxygen-level-dependent (BOLD) method for collecting fMRI data, called vascular space occupancy (VASO) [4, 5], to measure neural activations across cortical laminae in M1 while participants either tapped their thumb and forefinger together or simply imagined doing so. We report that, whereas executed movements (i.e., finger tapping) evoked neural responses in both the superficial layers of M1 that receive cortical input and the deep layers of M1 that send output to the spinal cord to support movement, imagined movements evoked responses in superficial cortical layers only. Furthermore, we found that finger tapping preceded by both imagined and executed movements showed a reduced response in the super-ficial layers (repetition suppression) coupled with a heightened response in the deep layers (repetition enhancement). Taken together, our results provide evidence for a mechanism whereby imagined movements can directly affect motor performance and might explain how neural repetition effects lead to improvements in behavior (e.g., repetition priming). |
| Databáze: | OpenAIRE |
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