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    "story_id": "mp-2026-10-29-010",
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    "headline": "A Palm Camera Gives the Hand Another Thumb",
    "slug": "a-palm-camera-gives-the-hand-another-thumb",
    "dek": "EgoThumb moves actuation to the forearm and maps egocentric images directly to a compact extra finger's continuous joint positions.",
    "summary": "EgoThumb moves actuation to the forearm and maps egocentric images directly to a compact extra finger's continuous joint positions.",
    "body_text": "Supernumerary fingers can let one hand hold an object while the biological fingers manipulate it, but bulky distal motors and explicit triggers limit use. EgoThumb places its tendon-driven actuation on the forearm and uses a palm-facing camera with a visual imitation policy to infer joint positions from the hand, object and scene. The authors report autonomous grasp and holding assistance across different users and environments and release the hardware and software as open source. The paper demonstrates a research prototype, not a medical device or a quantified improvement for every user or task.",
    "why_it_matters": "EgoThumb moves actuation to the forearm and maps egocentric images directly to a compact extra finger's continuous joint positions.",
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      "The paper demonstrates a research prototype, not a medical device or a quantified improvement for every user or task."
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    "first_published_at": "2026-10-29T09:00:00.000-04:00",
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    "tags": [
      "robotics",
      "wearables",
      "assistive technology",
      "open source"
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    {
      "source_id": "source-2026-10-29-010",
      "title": "arXiv preprint 2610.37582, original v1",
      "publisher": "arXiv",
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      "published_at": "2026-10-26T20:00:00.000-04:00",
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    "title": "A Palm Camera Gives the Hand Another Thumb",
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