Hubscher's maneuver

The Hubscher maneuver or Jack Test refers to a method of evaluating the flexibility of a pes cavus or flat foot type. The test is performed with the patient weight bearing while the clinician dorsoflexes the hallux and watches for the formation of an arch. A positive result (arch formation) results from the flatfoot being flexible. A negative result (lack of arch formation) results from the flatfoot being rigid.

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References:

Diagnosis and treatment of adult flatfoot. The Journal of Foot and Ankle Surgery, Volume 44, Issue 2, Pages 78-11 M. Lee, J. Vanore, J. Thomas, A. Catanzariti, G. Kogler, S. Kravitz, S. Miller, S. Gassen