Table 4.

Dimensions of thalamic lesions and results of somatic sensory testing in this series

Patient number	Diagnosis	Lesion class	Volume in Vc a	Volume posterior to Vc	Clinical hypersensitivity	Clinical pain descriptors (VAS intensity/unpleasant)	Warm threshold	Heat pain sensation	Cold sensation	Cold pain sensation	Tactile sensation
8	CPSP	Vc only	20%	2%	Hypersensitivity to pin and touch	Thermal, tingle (4.9/NA)	NA	NA	Hypoesthesia to acetone drop	Hyperalgesia to cold bar	Hypoesthesia to VF, tuning fork, allodynia to air puff
3	CPSP	Vc only	16%	2%	Cold allodynia	Thermal, movement, emotion (7.5/5.3)	Normal	WNL	Normal	Hyperalgesia to cold waterbath	Allodynia
18	CPSP	Vc plus	15%	20%	Allodynia to cold, touch, joint movement	Thermal, movement, emotion (8.5/7)	Hypoesth bilat	WNL	Hypoesth bilateral	Hyperalgesia	Hypoesthesia to VF, allodynia
13	Central dysesthesia syndrome	Vc plus	12%	16%	Paresthesias on joint or whole body movement	Tingle, emotion (0/10)	Hypoesth bilat	WNL	Hypoesth bilateral	Hypoalgesia	Hypoesthesia to VF, no hypersensitivity

All volumes apply to lesions and are expressed as a percentage of the volume of Vc. All results refer to the affected side, unless indicated as bilateral. Other conventions are as in Tables 2 and 3. NA, Not available; ND, stimulus not detected; WNL, within normal limits; VF, von Frey; VAS, visual analog scale; hypoesth bilat, hypoesthesia bilaterally.

Volumes of Vc and lesions estimated as Σ by slice of (area of structure × slice thickness).