Changes in tibialis anterior architecture affect the amplitude of surface electromyograms

Table 2 Average (standard deviation) values are reported for the pennation angle and for the width of the tibialis anterior muscle, both estimated for the three foot positions

	Tibialis anterior architecture
Foot position	Pennation angle (deg) ^a	Muscle width (mm) ^a
DF	15.3 (3.7)	67.8 (8.0)
NE	10.7 (4.5)	59.8 (7.2)
PF	8.0 (1.7)	58.1 (5.0)

DF, NE and PF respectively correspond to dorsiflexion, neutral and plantar flexion
^aindicates effect of foot position with P < 0.02

ISSN: 1743-0003