May one place a tallit under one’s head while sleeping, balancing respect for the mitzvah with personal need?

This source-based Torah study examines the question: May one place a tallit under one’s head while sleeping, balancing respect for the mitzvah with personal need? The canonical Hebrew discussion develops the issue through the weekly Torah portion and the sources cited there, preserving the distinctions, tensions, and practical implications of the original text. This localized discovery layer does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.