Table 1 Parameters of the cylindrical model.

From: Physical and electrophysiological motor unit characteristics are revealed with simultaneous high-density electromyography and ultrafast ultrasound imaging

 

Model parameter

Value

Motor unit properties

Fiber density

~ 135 fib/mm2

Discharge rate

8–15 pps

CoV of interspike interval

15%

Muscle properties

Number of motor units

200

Number of muscle fibers

80,000

Number of MU fibers (range)

150–1500

Muscle CSA

598 mm2

Limb properties

Skin thickness

1 mm

Subcutaneous tissue thickness

2.5 mm

Bone (radius)

20 mm

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