Fig. 2
From: Metatarsophalangeal joint extension changes ultrasound measurements for plantar fascia thickness
An illustration of the three metatarsophalangeal (MTP) joint extension positions employed during the ultrasound measurement for plantar fascia thickness: (a) plantar surface of the foot; (b) at rest; (c) 30° relative to the plantar surface of the foot; (d) max extension possible