Table 1.

Changes in nociceptive thresholds in Parkinson’s patients.

Patient groups		Nociceptive	Thresholds		Ref
	Electrical	Thermal	Cold	Mechanical
SPPD patients vs. control	n/a	n/a	↓	n/a	85
	↓	↓	n/a	n/a	13
	↓	n/a	n/a	↑	11
	n/a	↓	n/a	NS	9
	n/a	↓	n/a	n/a	21
No SPPD patients vs. control	n/a	↓	n/a	↓	86
	↓	n/a	n/a	n/a	15,33
	n/a	↓	n/a	n/a	8,22,87–89
	n/a	↓	n/a	↓	7
	↑	↑	n/a	n/a	12
	↓	↓	n/a	n/a	13
	↓	n/a	n/a	↑	11
	n/a	↓	n/a	NS	9
No SPPD patients vs. SPPD patients	n/a	↓	n/a	n/a	24
	NS	n/a	n/a	NS	11
	n/a	n/a	NS	n/a	14
	n/a	↓	n/a	NS	9
	n/a	↓	n/a	n/a	21
	NS	NS	n/a	n/a	13

Table 1 shows comparative changes in nociceptive thresholds in PD patients with and without SPPD (Spontaneous Pain in Parkinson’s Disease). ↓ = a reduction in thresholds indicating hypersensitivity, ↑ = an increase in thresholds indicating hyposensitivity, n/a test not performed, NS no significant difference