What is the valid placement range for the shel rosh on the head?

Tzitzit & TefillinTefillinShel Rosh

Synopsis

The shel rosh must be placed from the hairline at the forehead through the area where a baby's skull is soft (top of the head). A dispute exists about whether the valid zone extends to the entire height of the skull or only to the midpoint of the incline.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

Discussion coming soon.

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