Your brain’s working model of the body is flexible enough to incorporate tools—temporarily. That is fascinating, but it is not yet a voluntary body-rewriting power.
The learner makes six seated body-part-to-target estimates, separates direction from distance error and compares the complete error pattern with a delayed set of changed target positions.
This dossier explains the evidence and its limits. It is not a diagnosis, personal recommendation, assessment, clearance, performance promise or training programme. Actionable teaching appears only when the canonical Power record explicitly authorises it.
Complete bounded explanation
What this power means.
Capability to develop or express body schema in a declared context without inheriting broader claims.
What the current evidence supports
The brain’s action-oriented representation of the body can update during tool use and multisensory illusions, but durable voluntary control and broad function are not established.
How to observe or measure it without overclaiming
Kinematics, localization drift, ownership ratings and object judgments operationalize different constructs and cannot be combined into one body-schema score.
Myth
Extend your body at will
Metric
Declared movement, localization or ownership measure before and after tool/illusion exposure
Boundary
A temporary illusion cannot prove durable embodiment or recovery.
Negative and limiting findings
Effects were short laboratory after-effects, not durable functional training; a 12-person illusion cannot support clinical claims.
Claims this evidence cannot support
Expand your body at will
Own any prosthesis instantly
Rewrite your body image
A rubber-hand illusion treats trauma
Individual tutorial · FULL SELF GUIDED TUTORIAL
How to learn this Power now.
The learner makes six seated body-part-to-target estimates, separates direction from distance error and compares the complete error pattern with a delayed set of changed target positions.
Get readyChoose a pain-free arm and comfortable table-height reach, or use the diagram route.
Learn the method8 concrete steps teach the permitted method from start to finish.
See right and wrong4 comparisons show correct or safer execution beside common wrong or riskier choices.
PractiseUse one six-trial session twice a week for two weeks. Keep seat and hand start fixed, then vary target positions. Do not add eyes-closed standing or unstable surfaces.
Check progressFor six targets, count correct direction categories and calculate absolute centimetre or grid-unit difference between estimated and actual travel, with support and symptoms recorded.
Authority boundary: Titan teaches a concrete low-stakes method step by step while keeping evidence and transfer claims bounded. The method is Power-specific; its actionability follows this treatment.
Citation roles are explicit. A source may support existence or trainability while simultaneously limiting transfer, certainty, generalisation or safety.
Patrick Haggard; Shyma Jundi · 2009 · Primary research
Current teaching and evidence boundary
The next gate remains visible.
External confirmation is required before higher-authority use because: cultural, community-rights or affected-person authority.
A Power-specific tutorial is available at /tutorials/pwr-094/. It contains a plain-English method, 8 ordered steps, a worked example, right-versus-wrong comparisons, specific mistakes and corrections, practice, measurement, accessibility, stopping rules and evidence. Its self guided mode remains controlling.