Table 1: Morphological characteristics of ExP in different types of PM insertion.

PM tendon type ()Tendon width at the ExP
mean (range) [mm]
Tendon thickness at the ExP
mean (range) [mm]
Distance between ExP and insertion
mean (range) [mm]

Type I (51)3.73 (2.21–6.82)1.22 (0.32–2.45)34.33 (12.05–87.43)
Type II (26)2.18 (1.12–4.05)0.89 (0.37–1.73)33.09 (10.26–61.51)
Type II (8)2.74 (2.12–4.74)1.27 (0.74–1.69)38.67 (8.33–53.42)
Type IV (4)4.06 (2.84–4.88)0.72 (0.46–1.04)54.26 (41.22–73.09)
Type V (21)3.80 (2.19–6.12)0.88 (0.32–1.29)40.24 (20.89–49.68)
Type VI (6)2.17 (1.27–3.21)1.04 (0.46–1.76)22.53 (18.69–33.21)

PM: plantaris muscle; ExP: extension point.