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3D visualization of movements can amplify motor cortex activation during subsequent motor imagery.

Sollfrank T, Hart D, Goodsell R, Foster J, Tan T - Front Hum Neurosci (2015)

Bottom Line: We hypothesized that a richer sensory visualization might be more effective during instrumental conditioning, resulting in a more pronounced event related desynchronization (ERD) of the upper alpha band (10-12 Hz) over the sensorimotor cortices thereby potentially improving MI based brain-computer interface (BCI) protocols for motor rehabilitation.The largest upper alpha band power decrease was obtained during MI after a 3-dimensional visualization.Realistic visual feedback, consistent with the participant's MI, might be helpful for accomplishing successful MI and the use of such feedback may assist in making BCI a more natural interface for MI based BCI rehabilitation.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology I, Institute of Psychology, University of Würzburg Würzburg, Germany.

ABSTRACT
A repetitive movement practice by motor imagery (MI) can influence motor cortical excitability in the electroencephalogram (EEG). This study investigated if a realistic visualization in 3D of upper and lower limb movements can amplify motor related potentials during subsequent MI. We hypothesized that a richer sensory visualization might be more effective during instrumental conditioning, resulting in a more pronounced event related desynchronization (ERD) of the upper alpha band (10-12 Hz) over the sensorimotor cortices thereby potentially improving MI based brain-computer interface (BCI) protocols for motor rehabilitation. The results show a strong increase of the characteristic patterns of ERD of the upper alpha band components for left and right limb MI present over the sensorimotor areas in both visualization conditions. Overall, significant differences were observed as a function of visualization modality (VM; 2D vs. 3D). The largest upper alpha band power decrease was obtained during MI after a 3-dimensional visualization. In total in 12 out of 20 tasks the end-user of the 3D visualization group showed an enhanced upper alpha ERD relative to 2D VM group, with statistical significance in nine tasks.With a realistic visualization of the limb movements, we tried to increase motor cortex activation during subsequent MI. The feedback and the feedback environment should be inherently motivating and relevant for the learner and should have an appeal of novelty, real-world relevance or aesthetic value (Ryan and Deci, 2000; Merrill, 2007). Realistic visual feedback, consistent with the participant's MI, might be helpful for accomplishing successful MI and the use of such feedback may assist in making BCI a more natural interface for MI based BCI rehabilitation.

No MeSH data available.


Related in: MedlinePlus

Mean ERD/ERS values (i.e., mean and standard deviation) obtained for the left (left panel) and right (right panel) limb MI side of the 10–12 Hz upper alpha frequency band for all subjects with the two visualization conditions (2D, light grey bar; 3D, dark grey bar) on EP C3 and C4. Significant differences between the visualization modalities are indicated (*p < 0.01).
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Figure 3: Mean ERD/ERS values (i.e., mean and standard deviation) obtained for the left (left panel) and right (right panel) limb MI side of the 10–12 Hz upper alpha frequency band for all subjects with the two visualization conditions (2D, light grey bar; 3D, dark grey bar) on EP C3 and C4. Significant differences between the visualization modalities are indicated (*p < 0.01).

Mentions: Figure 3 presents a detailed overview of the mean ERD/ERS values with standard deviation and with t-test post hoc comparisons using a conservative significance level of 0.01, since we did not correct for multiple comparisons for the two visualization modalities (2D and 3D), separately for the different task, task side (left and right MI) and EP (C3 and C4). A difference between the visualization modalities can be seen in almost all tasks, depending on the EP and side of movement. In total in 12 out of 20 tasks the end-user of the 3D visualization group showed an enhanced upper alpha ERD relative to 2D VM group, with statistical significance (although not corrected for multiple comparisons) in nine tasks. The pattern of results suggests a generally higher ERD over the right (as compared to the left) sensorimotor region.


3D visualization of movements can amplify motor cortex activation during subsequent motor imagery.

Sollfrank T, Hart D, Goodsell R, Foster J, Tan T - Front Hum Neurosci (2015)

Mean ERD/ERS values (i.e., mean and standard deviation) obtained for the left (left panel) and right (right panel) limb MI side of the 10–12 Hz upper alpha frequency band for all subjects with the two visualization conditions (2D, light grey bar; 3D, dark grey bar) on EP C3 and C4. Significant differences between the visualization modalities are indicated (*p < 0.01).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4542583&req=5

Figure 3: Mean ERD/ERS values (i.e., mean and standard deviation) obtained for the left (left panel) and right (right panel) limb MI side of the 10–12 Hz upper alpha frequency band for all subjects with the two visualization conditions (2D, light grey bar; 3D, dark grey bar) on EP C3 and C4. Significant differences between the visualization modalities are indicated (*p < 0.01).
Mentions: Figure 3 presents a detailed overview of the mean ERD/ERS values with standard deviation and with t-test post hoc comparisons using a conservative significance level of 0.01, since we did not correct for multiple comparisons for the two visualization modalities (2D and 3D), separately for the different task, task side (left and right MI) and EP (C3 and C4). A difference between the visualization modalities can be seen in almost all tasks, depending on the EP and side of movement. In total in 12 out of 20 tasks the end-user of the 3D visualization group showed an enhanced upper alpha ERD relative to 2D VM group, with statistical significance (although not corrected for multiple comparisons) in nine tasks. The pattern of results suggests a generally higher ERD over the right (as compared to the left) sensorimotor region.

Bottom Line: We hypothesized that a richer sensory visualization might be more effective during instrumental conditioning, resulting in a more pronounced event related desynchronization (ERD) of the upper alpha band (10-12 Hz) over the sensorimotor cortices thereby potentially improving MI based brain-computer interface (BCI) protocols for motor rehabilitation.The largest upper alpha band power decrease was obtained during MI after a 3-dimensional visualization.Realistic visual feedback, consistent with the participant's MI, might be helpful for accomplishing successful MI and the use of such feedback may assist in making BCI a more natural interface for MI based BCI rehabilitation.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology I, Institute of Psychology, University of Würzburg Würzburg, Germany.

ABSTRACT
A repetitive movement practice by motor imagery (MI) can influence motor cortical excitability in the electroencephalogram (EEG). This study investigated if a realistic visualization in 3D of upper and lower limb movements can amplify motor related potentials during subsequent MI. We hypothesized that a richer sensory visualization might be more effective during instrumental conditioning, resulting in a more pronounced event related desynchronization (ERD) of the upper alpha band (10-12 Hz) over the sensorimotor cortices thereby potentially improving MI based brain-computer interface (BCI) protocols for motor rehabilitation. The results show a strong increase of the characteristic patterns of ERD of the upper alpha band components for left and right limb MI present over the sensorimotor areas in both visualization conditions. Overall, significant differences were observed as a function of visualization modality (VM; 2D vs. 3D). The largest upper alpha band power decrease was obtained during MI after a 3-dimensional visualization. In total in 12 out of 20 tasks the end-user of the 3D visualization group showed an enhanced upper alpha ERD relative to 2D VM group, with statistical significance in nine tasks.With a realistic visualization of the limb movements, we tried to increase motor cortex activation during subsequent MI. The feedback and the feedback environment should be inherently motivating and relevant for the learner and should have an appeal of novelty, real-world relevance or aesthetic value (Ryan and Deci, 2000; Merrill, 2007). Realistic visual feedback, consistent with the participant's MI, might be helpful for accomplishing successful MI and the use of such feedback may assist in making BCI a more natural interface for MI based BCI rehabilitation.

No MeSH data available.


Related in: MedlinePlus