Frequency of impaired warm and cold perception in 20 patients with familial dysautonomia tested at six different body sites
| Pathological thresholds (n=20) | Thermal hypoaesthesia (n=20) | Thermal dysaesthesia (n=20) | Thermal anaesthesia (n=20) | Incomplete perception (n=20) | Paradoxical perception (n=20) | |
|---|---|---|---|---|---|---|
| Site of cold stimulation: | ||||||
| Foot | 15 | 1 | 2 | 7 | 3 | 2 |
| Calf | 16 | 6 | 2 | 5 | 1 | 2 |
| Thenar | 17 | 7 | 3 | 2 | 3 | 2 |
| Forearm | 20 | 9 | 1 | 5 | 2 | 3 |
| Shoulder | 18 | 6 | 1 | 6 | 3 | 2 |
| Cheek | 17 | 6 | 1 | 5 | 4 | 1 |
| Site of warm stimulation: | ||||||
| Foot | 14 | 5 | 0 | 7 | 1 | 1 |
| Calf | 16 | 3 | 3 | 6 | 3 | 1 |
| Thenar | 20 | 12 | 2 | 1 | 3 | 2 |
| Forearm | 19 | 8 | 0 | 3 | 7 | 1 |
| Shoulder | 18 | 9 | 0 | 6 | 2 | 1 |
| Cheek | 17 | 7 | 1 | 6 | 2 | 1 |
The number of patients with pathological thresholds represents the sum of patients with thermal hypoaesthesia, dysaesthesia, or paradoxical sensation, and patients with absent or incomplete perception of repeated stimuli. No patient presented with hyperaesthesia. Incomplete perception was defined as perceiving< five of the stimuli applied for each threshold determination.