A Novel Fuzzy Expert System for the Identification of Severity of Carpal Tunnel Syndrome

Table 2

Membership function parameters for the input variables.

Input variable	Membership; function	Parameters
Motor median latency	Low	[0.0185 0.0145 0.615 3.082]
	Normal	[2.87 3.108 3.9 4.17]
	High	[3.902 4.4 5.73 6.39]
	Very high	[4.85 6.68 10.3 11.4]
Motor median NCV	Very low	[15.8 24.9 31.69 38.8]
	Low	[34.53 38 46.5 50.9]
	Normal	[47.95 51.7 65.1 70.7]
Motor ulnar latency	Low	[0.01 0.9732 1.54 2.03]
	Normal	[1.52 1.99 2.94 3.457]
	High	[3.082 4.51 6.21 6.66]
Motor ulnar NCV	Low	[24.1 28.6 42.1 50.86]
	Normal	[44.63 50.28 63.91 71.19]
	High	[60.61 72.74 75.91 90.71]
Sensory median latency	Low	[0.3763 0.6076 1.828 3.274]
	Normal	[2.01 2.38 3.25 3.746]
	High	[3.61 3.92 5.481 6.95]
	Very high	[6.252 6.89 8.42 10]
Sensory median NCV	Very low	[15 19.5 25.5 29.37]
	Low	[25.5 30.3 34.1 44.89]
	Normal	[40.3 45.6 85.2 87.8]
Sensory ulnar latency	Low	[0.234 0.678 1.395 2.07]
	Normal	[1.8 2.15 2.86 3.26]
	High	[2.9 3.17 5.23 7.427]
	Very high	[5.905 7.06 9.59 13.2]
Sensory ulnar NCV	Low	[22.4 33.6 42.56 48.75]
	Normal	[42.24 45.74 62.12 66.37]
	High	[62.62 68.7 71.5 82.7]
Pain	Absent	[0.014 0.029 0.03611 0.264]
	Mild	[0.102 0.283 0.5304]
	Moderate	[0.266 0.5 0.7844]
	Severe	[0.5304 0.743 1.001 1.19]
Numbness	Absent	[0.0103 0.0132 0.0357 0.253]
	Mild	[0.0886 0.253 0.456]
	Moderate	[0.253 0.456 0.6892]
	Severe	[0.456 0.7315 1.04 1.36]
Weakness	Absent	[0.013 0.024 0.0463 0.2235]
	Mild	[0.0595 0.247 0.4802]
	Moderate	[0.226 0.5172 0.779]
	Severe	[0.483 0.795 1.04 1.36]
Atrophy	Absent	[0.0136 0.014 0.0833 0.2817]
	Mild	[0.0675 0.266 0.5146]
	Moderate	[0.29 0.5 0.8188]
	Severe	[0.522 0.8241 1.03 1.35]
Parasthesia	Absent	[0.036 0.04 0.09392 0.36]
	Mild	[0.1 0.364 0.5913]
	Moderate	[0.361 0.56 0.8003]
	Severe	[0.602 0.8029 1.05 1.37]