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Results for “Pain Perception”

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At least 433 records · Page 24Linked to original sources
PubMed1994

Effects of aerobic exercise on pain perception, affect, and level of disability in individuals with fibromyalgia.

BACKGROUND AND PURPOSE: The purpose of this study was to evaluate the effect of aerobic walking on the pain, disability, and psychological symptoms of individuals with fibromyalgia. SUBJECTS: Nineteen subjects with fibromyalgia (2 men, 17 women), aged 30 to 69 years (mean = 49.35, SD = 11.83), participated. METHODS: Ten subjects walked 20 minutes, three times per week, for 8 weeks at 60% to 70% of the predicted maximum heart rate for their age. Nine subjects served as sedentary controls. Each subject completed pretests and posttests of the McGill Pain Questionnaire (MPQ), the Sickness Impact Profile (SIP), and the Brief Symptom Inventory (BSI). Due to initial differences on all measures, final scores were adjusted and analyzed by an analysis of covariance. RESULTS: The experimental group had lower scores on the MPQ on two of the three BSI indexes, and on the Psychosocial Dimension scale of the SIP, but higher ratings on the Physical Dimension scale of the SIP than did the control group on final testing. Only the differences on one index of the BSI and the Physical Dimension scale of the SIP were significant. CONCLUSION AND DISCUSSION: The results of the study are inconclusive. There were trends suggestive of a beneficial response to aerobic walking (lower psychological and pain ratings) but limited significant findings and higher physical disability ratings, for these individuals with fibromyalgia.

Adult↗
PubMed2001

Assessing supraspinal modulation of pain perception in individuals at risk for hypertension.

In this study we tested the hypothesis that hypoalgesia in individuals at risk for hypertension is related to enhanced activation of supraspinal pain modulation systems. Supraspinal inhibition of pain signals was assessed using a diffuse noxious inhibitory control paradigm, in which a noxious conditioning stimulus was used to suppress pain in response to a noxious test stimulus applied to a remote area of the body. Specifically, the nociceptive flexion reflex (NFR) was assessed in 113 healthy young adults before, during, and after exposure to forearm tourniquet ischemia. Consistent with previous evidence of hypoalgesia in individuals at risk for hypertension, offspring of hypertensive individuals exhibited significantly higher NFR thresholds than offspring of normotensive persons. Although NFR activity was significantly decreased in all participants during concomitant application of forearm ischemia, the degree of attenuation of NFR activity was not significantly different as a function of risk for hypertension.

Adult↗
PubMed2001

Common pathways in mental imagery and pain perception: an fMRI study of a subject with an amputated arm.

The present paper reviews data from two previous studies in our laboratory, as well as some additional new data, on the neuronal representation of movement and pain imagery in a subject with an amputated right arm. The subject imagined painful and non-painful finger movements in the amputated stump while being in a MRI scanner, acquiring EPI-images for fMRI analysis. In Study I (Ersland et al., 1996) the Subject alternated tapping with his intact left hand fingers and imagining "tapping" with the fingers of his amputated right arm. The results showed increased neuronal activation in the right motor cortex (precentral gyrus) when tapping with the fingers of the left hand, and a corresponding activation in the left motor cortex when imagining tapping with the fingers of the amputated right arm. Finger tappings of the intact left hand fingers also resulted in a larger activated precentral area than imagery "finger tapping" of the amputated right arm fingers. In Study II (Rosen et al., 2001 in press) the same subject imagining painful and pleasurable finger movements, and still positions of the fingers of the amputated arm. The results showed larger activations over the motor cortex for movement imagining versus imagining the hand being in a still position, and larger activations over the sensory cortex when imagining painful experiences. It can therefore be concluded that not only does imagery activate the same motor areas as real finger movements, but also that adding instructions of pain together with imaging moving the fingers intensified the activation compared with adding instructions about non-painful experiences. From these studies, it is clear that areas activated during actual motor execution to a large extent also are activated during mental imagery of the same motor commands. In this respect the present studies add to studies of visual imagery that have shown a similar correspondence in activation between actual object perception and imagery of the same object.

Adult↗
PubMed1975

Neurophysiological characterization of the anterolateral spinal cord neurons contributing to pain perception in man.

These studies have examined threshold, frequency, and refractory period characteristics of a neural population in the anterolateral quandrant (ALQ) of the spinal cord of man, stimulation of which produces pain. Subjects were 18 conscious humans undergoing percutaneous anterolateral cordotomy for relief of intractable pain. Pain could be produced by ALQ stimulation in all subjects. Pain thresholds ranged from 120 to 1000 muA (at 50 pulses/sec; 0.2 msec pulses), but the majority of thresholds were below 300 muA. A linear relationship was found between stimulation frequency and percentage of subjects reporting pain. This relationship ranged from 5 to 25 pulses/sec with 100% reporting pain at 25/sec and 0% at 5/sec. In 2 of 3 subjects, increases in stimulation frequency up to 500/sec did not produce pain when stimulation intensity was below threshold at 50/sec. The neuronal refractory period for pain in these subjects ranged between 1.0 and 2.0 msec, but the majority of relative refractory periods fell between 1.0 and 1.5 msec. The threshold, frequency, and refractory period data obtained in this study are similar to those found for wide dynamic range cells in the ventral half of the dorsal horn in the monkey and suggest that activation of these cells is a sufficient condition to produce pain in man.

Animals↗
PubMed1982

Regional hip blockade in osteoarthrosis. Effects on pain perception.

Eighteen patients with unilateral osteoarthrosis of the hip were investigated in a trial which involved the injection of nine with bupivacaine and nine with normal saline. All the patients completed daily pain analogue charts. Their pain, mobility and functional activity were assessed and gait characteristics analysed, once before the injection and then at three monthly intervals. All the patients recorded a decrease in pain level within two weeks of injection, but it subsequently rose to pre-injection levels. There were no other significant general improvements after the injection. A significant increase in the maximum force at toe-off for the good leg was recorded one month after the injection. However, no further significant differences were found in the gait performance of either group of patients throughout the study. It is concluded that the hip nerve regional blockade offers no useful relief to the pain of osteoarthrosis of the hip joint.

Aged↗
PubMed1993

[Reduction of pain perception of chronically ill children by intermittent infusion therapy].

Chronically ill children who require life-long i.v. infusions in regular intervals (i.e. Agammaglobulinemia, HIV-infection) can be traumatized by such painful procedures. Some children gradually accept such infusions, whereas other children become sensitized and react with increasing fear and resistance. We report on our experience with a combined method of local anaesthesia and active role-plays enacting the i.v. infusion on a puppet. In more than 230 applications (approximately 11 per child) in our outpatient clinic, 19/20 children reported significantly less pain sensations after the 2nd or 3rd application. The children learned to handle actively the threatening situation. The method of local anaesthesia with Lidocaine/Prilocaine and role playing is suitable to relieve pain and reduces distress of such invasive events as regular i.v. infusions are.

Abreaction↗
PubMedDate not supplied

Pain perception in the neonate: implications for circumcision.

Routine neonatal circumcision is still performed in most centers without the benefit of anesthesia. The authors give a review of the anatomy and physiology of the pain response as it relates to newborns, and discuss the growing body of literature regarding the ability of these very young patients to perceive pain. The discussion focuses on the relevance of this information to the controversial issue of the use of anesthesia during circumcision.

Circumcision, Male↗
PubMed1996

Pain perception and coping in female tension headache sufferers and headache-free controls.

The purpose of this study was to investigate how headache sufferers and headache-free controls differ in their responses to acute pain. Thirty-three women completed the study (15 headache sufferers and 18 controls). The cold pressor was used to induce pain, and a partially inflated blood pressure cuff was used as a nonpainful comparison task. Headache sufferers reported more discomfort during both tasks; however, the 2 groups did not differ in the number of facial expressions of pain displayed during the tasks. Headache sufferers reported a tendency to catastrophize during both tasks; positive coping did not differ between the 2 groups. These results offer evidence that recurrent tension headache sufferers are more sensitive to both painful and nonpainful stimuli and that they cope differently from controls with these physical stressors.

Adaptation, Psychological↗