# PWR-210 — Brain-controlled prostheses: learner worksheet Release: Revision 7T · Full Tutorial Edition Estimated time: Estimated 15 min reading; practical time is provider-set Difficulty: Intermediate Equipment: Specialist equipment — Declared Brain-controlled prostheses fixture: A supervised digital twin shows two oversized targets labelled LEFT and RIGHT. After separate confirmation, an enclosed robotic pointer may follow one pre-programmed path to the chosen target; it never grasps an object.; Setup aid for Check brain interface and enclosure: Test signal quality, decoder/version logging, enclosed fixed paths, HOME return and hard stop before any actuator connection.; Brain-controlled prostheses log: Task success, movement error/time, unintended activation, daily wear/use, adverse events, maintenance and fallback versus best alternative control; retain Brain-controlled prostheses errors, assistance, stop and fallback.; Brain-controlled-prosthesis source grid: from “Reach and grasp by people with tetraplegia using a neurally controlled robotic arm”, trace signal, decoder, robotic action, participant confirmation and task outcome. Contrast that complete chain with the interfaces in “Self-Contained Neuromusculoskeletal Arm Prostheses”. Use the NIST Privacy Framework for signal records; only the clinical-engineering team may gate pointer motion. Space: Specialist setting Automated structural checklist: 10 of 10 structural checks present Evidence quality/context: G4; Deep research depth Automated method-quality band: Comprehensive Method-rating basis: Structure coverage, instruction/check specificity, alternative distinctness, source troubleshooting, comparison depth and whether purpose/check fields are authored rather than derived. Editorial review: Pending manual editorial sign off ## Before you begin - [ ] I read the tutorial authority and stop conditions. - [ ] I have the required equipment/space or a declared accessible alternative. ## Canonical source context In a supervised digital twin, Alex learns LEFT, RIGHT and REST, then confirms a decoded preview before an enclosed pointer may move along one fixed path. One correct selection and one rejected false preview demonstrate the confirmation gate. They do not show continuous prosthetic control or restored limb movement. Target outcome: With the clinical-engineering team, the participant learns LEFT, RIGHT and REST classes, confirms the decoded preview through an established channel, and safely rejects an incorrect selection. ### Authority and setup conditions - Confirm participant consent, clinical/research approval and a reliable non-BCI confirmation channel. - Test signal quality, decoder/version logging, enclosed fixed paths, HOME return and hard stop before any actuator connection. - Start check for Brain-controlled prostheses: A decoded class cannot move hardware until the person confirms it. - Top-of-sheet stop for Brain-controlled prostheses: Stop for headache, seizure-like activity, skin/interface change, distress, marked fatigue, new neurological symptom or withdrawal. ### Required or supplied materials - Declared Brain-controlled prostheses fixture: A supervised digital twin shows two oversized targets labelled LEFT and RIGHT. After separate confirmation, an enclosed robotic pointer may follow one pre-programmed path to the chosen target; it never grasps an object. - Setup aid for Check brain interface and enclosure: Test signal quality, decoder/version logging, enclosed fixed paths, HOME return and hard stop before any actuator connection. - Brain-controlled prostheses log: Task success, movement error/time, unintended activation, daily wear/use, adverse events, maintenance and fallback versus best alternative control; retain Brain-controlled prostheses errors, assistance, stop and fallback. - Brain-controlled-prosthesis source grid: from “Reach and grasp by people with tetraplegia using a neurally controlled robotic arm”, trace signal, decoder, robotic action, participant confirmation and task outcome. Contrast that complete chain with the interfaces in “Self-Contained Neuromusculoskeletal Arm Prostheses”. Use the NIST Privacy Framework for signal records; only the clinical-engineering team may gate pointer motion. ## 1. Define selection before movement The team enables only LEFT, RIGHT and REST, names the separate confirmation channel and locks the robotic pointer at HOME. Why: A decoded class cannot move hardware until the person confirms it. Success check: A decoded class cannot move hardware until the person confirms it. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “A decoded class cannot move hardware until the person confirms it.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 2. Check brain interface and enclosure Clinicians check participant status and communication; engineers log interface and decoder versions, reject noisy channels, test the enclosure, HOME return and hard stop. Why: The signal path and robot path both pass their own readiness checks. Success check: The signal path and robot path both pass their own readiness checks. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “The signal path and robot path both pass their own readiness checks.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 3. Collect labelled brain-signal trials On random LEFT, RIGHT or REST cues, the participant performs the approved mental task while the provider rejects eye, muscle or movement artefact and schedules breaks. Why: Every accepted window has a true label and rejected windows remain counted. Success check: Every accepted window has a true label and rejected windows remain counted. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “Every accepted window has a true label and rejected windows remain counted.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 4. Test on held-out windows Freeze the decoder and score unused calibration windows in a three-class confusion table before connecting motion. Why: LEFT, RIGHT and REST performance, including false commands during REST, meets the protocol gate. Success check: LEFT, RIGHT and REST performance, including false commands during REST, meets the protocol gate. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “LEFT, RIGHT and REST performance, including false commands during REST, meets the protocol gate.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 5. Preview and confirm Show the decoded target on screen; the participant accepts or rejects it through the established eye-code, switch or AAC channel. Why: The log contains neural selection plus independent confirmation for every proposed action. Success check: The log contains neural selection plus independent confirmation for every proposed action. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “The log contains neural selection plus independent confirmation for every proposed action.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 6. Execute one fixed path Only after a confirmed LEFT selection, the engineer enables the enclosed pointer’s slow pre-programmed HOME-to-LEFT path. Why: The pointer reaches LEFT without free-form steering, contact or boundary breach. Success check: The pointer reaches LEFT without free-form steering, contact or boundary breach. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “The pointer reaches LEFT without free-form steering, contact or boundary breach.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 7. Reject an incorrect preview On a staged false RIGHT preview, the participant sends REJECT; the pointer stays at HOME and the decoder error is preserved. Why: A wrong decode produces no hardware movement and no need for an opposite brain command. Success check: A wrong decode produces no hardware movement and no need for an opposite brain command. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “A wrong decode produces no hardware movement and no need for an opposite brain command.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 8. Compare selection routes and close Compare accuracy, selection time, false REST commands, correction, fatigue and setup with the participant’s best switch or other approved selector; disable motion and return HOME. Why: The report distinguishes target selection from robotic execution and unaided limb movement. Success check: The report distinguishes target selection from robotic execution and unaided limb movement. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “The report distinguishes target selection from robotic execution and unaided limb movement.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## Reflection What changed? ________________________________________________________________________________ What remains difficult? ________________________________________________________________________________ What will I repeat, adapt, ask for help with, or stop? ________________________________________________________________________________ --- Completion of this worksheet demonstrates tutorial participation only. It does not establish capability, qualification, safety clearance, diagnosis, treatment or independent validation.