Fig. 1
From: The technology of tongue and hard palate contact detection: a review
(a, b, and d reproduced with permission by Wrench et al. [3] c reproduced with permission by Fletcher et al. [17])
Modification and development of a flexible circuit of frame body artificial palate by Rion Co Ltd, b flexible circuit of T bar cut-out introduced by Hardcastle et al., c development of palatometer by Fletcher et al. in 1978, and d flexible circuit three-lobed structure by Fletcher et al. 2005