Parameters:
(1) range in degrees for cervical spine movement
(2) music tempo in beats per minute (range from 80 to 180 beats pre minute)
range in degrees =
= (degrees flexion) + (degrees extension)
For an adult male the range of cervical spine is 60.4 degrees flexion and 69.9 degrees extension.
|
Range in Degrees
|
Curve for Neck Injury Criteria in (m^2)/(s^2)
|
|
45
|
(0.000142 * ((tempo)^2)) – (0.02255 * (tempo)) + 0.0748
|
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60
|
(0.0001826 * ((tempo)^2)) + (0.001888 * (tempo)) – 0.1818
|
|
75
|
(0.0002451 * ((tempo)^2)) + (0.0013 * (tempo)) – 0.1964
|
|
90
|
(0.0002908 * ((tempo)^2)) + (0.008167 * (tempo)) – 0.7441
|
|
105
|
(0.0004045 * ((tempo)^2)) – (0.005664 * (tempo)) + 0.2495
|
|
120
|
(0.0004803 * ((tempo)^2)) – (0.007779 * (tempo)) + 0.5102
|
For ranges in-between, the neck criteria can be approximated using:
(1) base value for range
(2) ceiling value for range
(3) 15 degrees (range in degrees between base and ceiling)
(4) number of degrees minus base in degrees
approximate neck injury criteria in meter-squared divided by second-squared =
= (base value) + (((degrees) – (base degrees)) / 15 * ((ceiling value) – (base value)))
An NIC >= 8.7 (m^2)/(s^2) may be associated with acute soft tissue injury affecting neck structures..
An NIC >= 15 (m^2)/(s^2) may be associated with long-term neck injury.
