Research Article
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] |
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