1. Figure 1. Typical cursor trajectory of users with CP with poorly developed fine motor control during a pointing task.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
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2. Figure 2. MouseField. The cursor gets captured by the button's gravity field after entering a radius Dmin.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please

3. Figure 3. Representation of the effects of the gravity fields in the trajectory of the captured cursor. The dashed red line depicts the resulting trajectory; the solid blue line, the trajectory the cursor would take in the absence of a field.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please

4. Figure 4. Representation of an escape maneuver
Figure 4. Representation of an escape maneuver. The captured cursor escapes the gravity field after reaching a distance of Deff from the center of the button. Then, its location converges to the location of the head mouse, i.e. the cursor without the effects of the field.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please

5. Figure 5. Work session with ENLAZA
Figure 5. Work session with ENLAZA. The participant wears a prototype of the Werium IMU (Werium Assistive Solutions S.L., Spain).
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please

6. Figure 6. Test procedure. The participants were asked to perform six pointing tasks characterized by other six different values of ID using the ENLAZA interface with and without the pointing facilitation technique, MouseField.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please

7. Figure 9. Mean values and standard error of the ten metrics estimated during pointing tasks performed by the participants using ENLAZA alone (dark blue) and ENLAZA complemented with MouseField (light blue) classified in three groups, C₁–C₃, after the cluster analysis.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please

8. Figure 7. Mean values and standard error of the ten metrics estimated during pointing tasks performed by the participants using ENLAZA alone (dark blue) and ENLAZA complemented with MouseField (light blue). Significance: *<0.05, **<0.005.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please

9. Figure 8. Results of fuzzy c-means clustering
Figure 8. Results of fuzzy c-means clustering. On the left, groups and their size generated for the interaction with ENLAZA alone. On the right, localization (centers) of the groups in a 10D space.
From: A Novel Head Cursor Facilitation Technique for Cerebral Palsy: Functional and Clinical Implications
Interact Comput. 2017;29(5): doi: /iwc/iwx009
Interact Comput | © The Author Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please