scholarly journals A contact thermal stimulator for neurobehavioral research on temperature sensation

1981 ◽  
Vol 6 (3) ◽  
pp. 281-284 ◽  
Author(s):  
Thomas J. Morrow ◽  
Kenneth L. Casey
Keyword(s):  
Temperature Sensation ◽  
Thermal Stimulator

The subjective sensation induced by various thermal pulse stimulation in healthy volunteers

2017 ◽  
Vol 16 (1) ◽  
pp. 177-178
Author(s):  
Y. Oono ◽  
H. Kubo ◽  
T. Imamura ◽  
K. Matsumoto ◽  
S. Uchida ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Thermal Sensation ◽  
Heat Pulse ◽  
Peltier Element ◽  
Cold Pain ◽  
Thermal Pulse ◽  
Heat Sensation ◽  
Thermal Stimulator ◽  
Subjective Sensation ◽  
Pulse Stimulation

AbstractAimsNovel quantitative thermal stimulator devices (QTSDs) have been developed to deliver thermal pulse stimulation with regulated constant temperatures (0–45°C) with a Peltier element probe (16 cm2). The aim of this study was to investigate subjective sensation induced by the interaction between simultaneously applied painful cold and heat stimuli in various sites.MethodsTwenty healthy subjects (12 men and 8 women, age range: 25–45 years) participated. The intensity of cold pain (CP) and heat pain (HP) stimuli were assessed by visual analogue scale (VAS) and adjusted to elicit approximately 70/100 mm. Alternately pulse stimulations (pulse duration of 40 s; 0.025 Hz) which consisted of CP, HP, or neutral temperature (32°C) were applied. Four conditions were tested and subjective sensations were assessed: (1) one QTSD was applied to non-dominant forearm and cold-heat pulse stimulation was applied.Two QTSDs were applied to (2) non-dominant ipsilateral forearm with 5 cm apart, (3) non-dominant and contralateral forearms, (4) non-dominant forearm and ipsilateral thigh, respectively. In conditions of (2)–(4), CP-neutral pulse stimulation (C-Neutral) and neutral-HP pulse stimulation (Neutral-H) were applied simultaneously with opposite phase, respectively.ResultsCP and HP were 3.9±1.0°C (mean±SD) and 43.6±0.9°C (mean±SD), respectively. The VAS values for CP and HP were 73.4±2.0 mm (mean±SD) and 76.4 ±4.8 mm (mean±SD), respectively. Some subjects could not discriminate cold or heat sensation and some felt cold as heat (paradoxical sensation). The number of subjects with such paradoxical sensation in (1), (2), (3), (4) were 9 (45%), 2 (10%), 0 (0%) and 3 (15%), respectively.ConclusionsIn healthy volunteers, simultaneous alternately cold-heat pulse stimulation on one site triggered paradoxical thermal sensation, which to a much less degree is triggered when C-Neutral and Neutral-H were applied to different dermatomes. This suggests that the mechanism is primarily triggered peripherally.

A thalamic nucleus specific for pain and temperature sensation

Nature ◽  
1994 ◽  
Vol 372 (6508) ◽  
pp. 770-773 ◽  
Author(s):  
A. D. Craig ◽  
M. C. Bushnell ◽  
E.-T. Zhang ◽  
A. Blomqvist
Keyword(s):  
Thalamic Nucleus ◽  
Temperature Sensation

scholarly journals Hyperalagesia with loss of temperature sensation in one side of the body due to pinpoint infarction of contralateral spinothalamic tract

2009 ◽  
Vol 49 (5) ◽  
pp. 262-266 ◽  
Author(s):  
Yoko Kashiwamura ◽  
Motoharu Kawai ◽  
Junichi Ogasawara ◽  
Michiaki Koga ◽  
Kiyoshi Negoro ◽  
...  
Keyword(s):  
The Body ◽  
Spinothalamic Tract ◽  
Temperature Sensation

scholarly journals Analysis of Hot-Cold Confusion on Fingers

2021 ◽  
Vol 33 (5) ◽  
pp. 1117-1127
Author(s):  
Satoshi Hashiguchi ◽  
Keyword(s):  
Thermal Properties ◽  
Proximal Phalanx ◽  
Mutual Effect ◽  
Distal Phalanx ◽  
Experimental Results ◽  
Middle Phalanx ◽  
Temperature Sensation ◽  
Temperature Stimulus

The thermosensory system may misidentify a temperature stimulus with different thermal properties. The mechanism of this hot-cold confusion has not been clarified; hence, it has not yet been applied. In this study, we created a wearable temperature presentation device that is closer to the application and analyzed the tendency and mechanism of temperature confusion by analyzing the hot-cold confusion of temperature sensation in the fingers, which are most frequently in contact with objects. Two experiments were performed. In the first experiment, we presented stimuli on the tips of three fingers (first, second, and third fingers). In the second experiment, we presented stimuli at the center of the distal phalanx, middle phalanx, and proximal phalanx of the first finger. The experimental results indicated the occurrence of hot-cold confusion. Domination, in which the center is dominated by both ends, and a mutual effect, in which the center interacts with both ends, were observed.

scholarly journals Predicting the risk of future diabetic foot ulcer occurrence: a prospective cohort study of patients with diabetes in Tanzania

2020 ◽  
Vol 8 (1) ◽  
pp. e001122 ◽  
Author(s):  
Roozbeh Naemi ◽  
Nachiappan Chockalingam ◽  
Janet K Lutale ◽  
Zulfiqarali G Abbas
Keyword(s):  
Diabetic Foot ◽  
Foot Ulcer ◽  
Diabetic Foot Ulcer ◽  
Temperature Tolerance ◽  
Dry Skin ◽  
Perception Threshold ◽  
Foot Ulceration ◽  
Temperature Sensation ◽  
Patients With Diabetes ◽  
Vibration Perception

ObjectivesThe aim of this study was to identify the parameters that predict the risk of future foot ulcer occurrence in patients with diabetes.Research design and methods1810 (male (M)/female (F): 1012/798) patients, with no foot ulcer at baseline, participated in this study. Data from a set of 28 parameters were collected at baseline. During follow-up, 123 (M/F: 68/55) patients ulcerated. Survival analyses together with logistic regression were used to identify the parameters that could predict the risk of future diabetic foot ulcer occurrence.ResultsA number of parameters (HR (95% CI)) including neuropathy (2.525 (1.680 to 3.795)); history of ulceration (2.796 (1.029 to 7.598)); smoking history (1.686 (1.097 to 2.592)); presence of callus (1.474 (0.999 to 2.174)); nail ingrowth (5.653 (2.078 to 15.379)); foot swelling (3.345 (1.799 to 6.218)); dry skin (1.926 (1.273 to 2.914)); limited ankle (1.662 (1.365 to 2.022)) and metatarsophalangeal (MTP) joint (2.745 (1.853 to 4.067)) ranges of motion; and decreased (3.141 (2.102 to 4.693)), highly decreased (5.263 (1.266 to 21.878)), and absent (9.671 (5.179 to 18.059)) sensation to touch; age (1.026 (1.010 to 1.042)); vibration perception threshold (1.079 (1.060 to 1.099)); duration of diabetes (1.000 (1.000 to 1.000)); and plantar pressure at the first metatarsal head (1.003 (1.001 to 1.005)), temperature sensation (1.019 (1.004 to 1.035)) and temperature tolerance (1.523 (1.337 to 1.734)) thresholds to hot stimuli and blood sugar level (1.027 (1.006 to 1.048)) were all significantly associated with increased risk of ulceration. However, plantar pressure underneath the fifth toe (0.990 (0.983 to 0.998)) and temperature sensation (0.755 (0.688 to 0.829)) and temperature tolerance (0.668 (0.592 to 0.0754)) thresholds to cold stimuli showed to significantly decrease the risk of future ulcer occurrence. Multivariate survival model indicated that nail ingrowth (4.42 (1.38 to 14.07)); vibration perception threshold (1.07 (1.04 to 1.09)); dry skin status (4.48 (1.80 to 11.14)); and temperature tolerance threshold to warm stimuli (1.001 (1.000 to 1.002)) were significant predictors of foot ulceration risk in the final model. The mean time to ulceration was significantly (p<0.05) shorter for patients with: dry skin (χ2=11.015), nail ingrowth (χ2=14.688), neuropathy (χ2=21.284), or foot swelling (χ2=16.428).ConclusionNail ingrowth and dry skin were found to be strong indicators of vulnerability of patients to diabetic foot ulceration. Results highlight that assessments of neuropathy in relation to both small and larger fiber impairment need to be considered for predicting the risk of diabetic foot ulceration.

TEMPERATURE SENSATION TESTER.

The Lancet ◽  
1932 ◽  
Vol 219 (5666) ◽  
pp. 732
Author(s):  
H. Wolfe Corner
Keyword(s):  
Temperature Sensation
Sign in / Sign up

Export Citation Format

Share Document