Ultrasonography features of the intrinsic foot muscles in patients with and without plantar fasciitis: A novel case-control research study

IntroductionPlantar fasciitis (PF) is the most common cause of heel pain.(1) This condition was described as a degenerative syndrome associated with pain, lack of functionality and stiffness on the plantar fascia. The aim of the present study was to compare with ultrasound imaging (USI) the thickness and cross-sectional area of the intrinsic foot muscles between individuals with and without plantar fasciitis (PF).Material and methodsA total of 64 volunteers from 18 to 55 years were recruited for the present study. The sample was divided in two groups: A group, composed of participants diagnosed by PF (n = 32) and B group, composed by healthy participants (n = 32).ResultsUSI measurements for FBH CSA (p = 0.035) was decreasing showing statistically significant differences for the PF group, while the QP CSA (p = 0.40) was increasing reporting statistically significant differences for the PF group with respect the healthy group. The rest of the IFM did not show statistically significant differences, however in FHB, FDB, QP and AHB thicknesses and FDB CSA a slightly decrease for the PF group have been observed.ConclusionsUSI measurements showed that the CSA of the FHB muscle is reduced in patients with PF while the CSA of the QP muscle is increased in patients with PF.