Table 2 Each subjects (n = 20) adjusted R2 values (mean value for three tests) for linear and non-linear relationship between the deformation area for the five neck muscles (trapezius, splenius, semispinalis capitis, semispinalis cervicis and multifidus/rotatores) and percent of maximal voluntary contraction (MVC).

From: Ultrasound imaging of dorsal neck muscles with speckle tracking analyses – the relationship between muscle deformation and force

Subject

Gender

Linear

Subject

Gender

Non-linear

20

F

0.96

3

M

0.98

7

M

0.94

9

M

0.92

14

M

0.92

15

F

0.89

18

M

0.90

13

F

0.88

19

F

0.90

8

F

0.81

12

M

0.87

5

M

0.79

6

F

0.81

16

F

0.71

4

M

0.81

10

M

0.42

2

M

0.77

1

M

0.39

11

F

0.60

   

17

M

0.46

   
  1. M; male, F; female.