Lateralization of brain activity during motor planning of proximal and distal gestures
Praxis functions are predominantly processed by the left hemisphere. However, limb apraxia is found in less than 50% of patients with left hemisphere damage, and also, although infrequently, in patients with right hemisphere damage. We studied brain representation of preparation/planning of tool-use...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01664328_v272_n_p226_MakiMarttunen http://hdl.handle.net/20.500.12110/paper_01664328_v272_n_p226_MakiMarttunen |
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paper:paper_01664328_v272_n_p226_MakiMarttunen2025-07-30T17:54:36Z Lateralization of brain activity during motor planning of proximal and distal gestures Distal gesture FMRI Functional connectivity Ideomotor apraxia Praxis planning Proximal gesture adult article brain function distal gesture functional magnetic resonance imaging gesture hemispheric dominance human human experiment inferior frontal gyrus left hemisphere limb movement motor performance normal human planning priority journal proximal gesture right handedness supplementary motor area voxel based morphometry arm brain brain mapping individuality nerve tract nuclear magnetic resonance imaging physiology psychomotor performance Adult Arm Brain Brain Mapping Functional Laterality Gestures Humans Individuality Magnetic Resonance Imaging Neural Pathways Psychomotor Performance Praxis functions are predominantly processed by the left hemisphere. However, limb apraxia is found in less than 50% of patients with left hemisphere damage, and also, although infrequently, in patients with right hemisphere damage. We studied brain representation of preparation/planning of tool-use pantomime separating the gestures involving mostly distal limb control (e.g., using scissors) from those involving proximal limb control (e.g., hammering). During the fMRI scan transitive pantomimes were performed with the dominant and the non-dominant hand by right-handed healthy subjects. Random and voxel-based analysis through laterality index (LI) calculation, demonstrated that for both limbs, distal gesture planning was in general left lateralized, while for the proximal condition the representation was found to be more bilateral particularly in the inferior frontal gyrus. LI distributions across subjects indicated that while the majority of subjects are left-hemispheric dominant for praxis, there are a minority with the opposite lateralization. Functional connectivity analysis showed that while the correlation between homolog areas involved in gesture production was high irrespective of gesture type, their correlation to the supplementary motor area was high in proximal but not distal conditions. Therefore, transitive gestures, when pantomimed to verbal commands, are differentially represented inter and intra hemispherically depending on whether the gesture is performed with the right or left arm or whether it involves predominantly distal or proximal limb movements. Furthermore, the representation of the different types of gestures may be related to a modulation of the connectivity between areas involved in motor planning. © 2014 Elsevier B.V. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01664328_v272_n_p226_MakiMarttunen http://hdl.handle.net/20.500.12110/paper_01664328_v272_n_p226_MakiMarttunen |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Distal gesture FMRI Functional connectivity Ideomotor apraxia Praxis planning Proximal gesture adult article brain function distal gesture functional magnetic resonance imaging gesture hemispheric dominance human human experiment inferior frontal gyrus left hemisphere limb movement motor performance normal human planning priority journal proximal gesture right handedness supplementary motor area voxel based morphometry arm brain brain mapping individuality nerve tract nuclear magnetic resonance imaging physiology psychomotor performance Adult Arm Brain Brain Mapping Functional Laterality Gestures Humans Individuality Magnetic Resonance Imaging Neural Pathways Psychomotor Performance |
| spellingShingle |
Distal gesture FMRI Functional connectivity Ideomotor apraxia Praxis planning Proximal gesture adult article brain function distal gesture functional magnetic resonance imaging gesture hemispheric dominance human human experiment inferior frontal gyrus left hemisphere limb movement motor performance normal human planning priority journal proximal gesture right handedness supplementary motor area voxel based morphometry arm brain brain mapping individuality nerve tract nuclear magnetic resonance imaging physiology psychomotor performance Adult Arm Brain Brain Mapping Functional Laterality Gestures Humans Individuality Magnetic Resonance Imaging Neural Pathways Psychomotor Performance Lateralization of brain activity during motor planning of proximal and distal gestures |
| topic_facet |
Distal gesture FMRI Functional connectivity Ideomotor apraxia Praxis planning Proximal gesture adult article brain function distal gesture functional magnetic resonance imaging gesture hemispheric dominance human human experiment inferior frontal gyrus left hemisphere limb movement motor performance normal human planning priority journal proximal gesture right handedness supplementary motor area voxel based morphometry arm brain brain mapping individuality nerve tract nuclear magnetic resonance imaging physiology psychomotor performance Adult Arm Brain Brain Mapping Functional Laterality Gestures Humans Individuality Magnetic Resonance Imaging Neural Pathways Psychomotor Performance |
| description |
Praxis functions are predominantly processed by the left hemisphere. However, limb apraxia is found in less than 50% of patients with left hemisphere damage, and also, although infrequently, in patients with right hemisphere damage. We studied brain representation of preparation/planning of tool-use pantomime separating the gestures involving mostly distal limb control (e.g., using scissors) from those involving proximal limb control (e.g., hammering). During the fMRI scan transitive pantomimes were performed with the dominant and the non-dominant hand by right-handed healthy subjects. Random and voxel-based analysis through laterality index (LI) calculation, demonstrated that for both limbs, distal gesture planning was in general left lateralized, while for the proximal condition the representation was found to be more bilateral particularly in the inferior frontal gyrus. LI distributions across subjects indicated that while the majority of subjects are left-hemispheric dominant for praxis, there are a minority with the opposite lateralization. Functional connectivity analysis showed that while the correlation between homolog areas involved in gesture production was high irrespective of gesture type, their correlation to the supplementary motor area was high in proximal but not distal conditions. Therefore, transitive gestures, when pantomimed to verbal commands, are differentially represented inter and intra hemispherically depending on whether the gesture is performed with the right or left arm or whether it involves predominantly distal or proximal limb movements. Furthermore, the representation of the different types of gestures may be related to a modulation of the connectivity between areas involved in motor planning. © 2014 Elsevier B.V. |
| title |
Lateralization of brain activity during motor planning of proximal and distal gestures |
| title_short |
Lateralization of brain activity during motor planning of proximal and distal gestures |
| title_full |
Lateralization of brain activity during motor planning of proximal and distal gestures |
| title_fullStr |
Lateralization of brain activity during motor planning of proximal and distal gestures |
| title_full_unstemmed |
Lateralization of brain activity during motor planning of proximal and distal gestures |
| title_sort |
lateralization of brain activity during motor planning of proximal and distal gestures |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01664328_v272_n_p226_MakiMarttunen http://hdl.handle.net/20.500.12110/paper_01664328_v272_n_p226_MakiMarttunen |
| _version_ |
1840327725656571904 |