May a non-Jewish caregiver or a woman help put tefillin on a Jewish man who is physically unable to put them on himself?

This source-based Torah study examines the question: May a non-Jewish caregiver or a woman help put tefillin on a Jewish man who is physically unable to put them on himself? It follows the canonical Hebrew discussion through the weekly Torah portion and the Jewish sources cited there. This localized discovery layer is a concise abstract, not a full translation and not a practical ruling. Any halakhic, medical, legal, security, bereavement, political, mystical or other sensitive claim remains subject to the canonical review status and should not be treated as individualized advice or as an empirical conclusion.