OBJECTIVETo compare the central nervous system processing of orofacial pain patients who might have atypical pain (group 1) after occlusal treatment with those patients who had synovitis pain of temporomandibular disorders (TMD) (group 2).

METHODSSeven patients in each group were included in this study. Ten painless normal subjects (group 3) were employed as a control group. Functional magnetic resonance imaging (fMRI) was used to observe the activation of the brain evoked by clenching. The fMRI data were treated statistically as the result of each group.

RESULTSThe main active regions of three groups were different. The main active regions of the group 1 were bilateral thalamus and anterior cingulate cortex. The group 2 activated a quite different pain network, including postcentral gyrus, cingulate gyrus and prefrontal cortices.

CONCLUSIONSThe pain network is different between the two groups of pain patients and the pain network is more sensitive in atypical pain patients than in synovitis pain patients.

Adult ; Brain ; physiopathology ; Dental Restoration, Permanent ; adverse effects ; psychology ; Denture, Partial, Fixed ; adverse effects ; psychology ; Facial Pain ; etiology ; physiopathology ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Temporomandibular Joint Disorders ; etiology ; physiopathology

OBJECTIVESThe National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI) was used to determine the chronic prostatitis syndrome in young men (from 20 to 48 years old) of clinical validity.

METHODS227 patients with chronic prostatitis syndrome (CPS)/chronic pelvic pain syndrome and 32 patients with BPH were randomized to study using NIH-CPSI.

RESULTS1. The main manifestations of CPS patients were pain or uncomfort. Those were more common in CPS than BPH. 2. 79.30% CPS patients had a sensation of not emptying bladder completely after finished urinating, 44.93% patients had to urinate again less than two hours after finished urinating. 3. 51.51% patients with CPS have more effect on work, 90.31% patients on free life, and 68.72% patients on quality of life than BPH.

CONCLUSIONSAccording NIH-CPSI, the main manifestations of CPS are pain or uncomfort. CPS patients have more effect on work and quality of life.

Adult ; Chronic Disease ; Health Surveys ; Humans ; Male ; Middle Aged ; National Institutes of Health (U.S.) ; Pain ; etiology ; Prostatitis ; physiopathology ; psychology ; Quality of Life ; Surveys and Questionnaires ; United States

Pain is a major symptom in cancer patients, and most cancer patients with advanced or terminal cancers suffer from chronic pain related to treatment failure and/or tumor progression. In the present study, we examined the development of cancer pain in mice. Murine hepatocarcinoma cells, HCa-1, were inoculated unilaterally into the thigh or the dorsum of the foot of male C3H/HeJ mice. Four weeks after inoculation, behavioral signs were observed for mechanical allodynia, cold allodynia, and hyperalgesia using a von Frey filament, acetone, and radiant heat, respectively. Bone invasion by the tumor commenced from 7 days after inoculation of tumor cells and was evident from 14 days after inoculation. Cold allodynia but neither mechanical allodynia nor hyperalgesia was observed in mice that received an inoculation into the thigh. On the contrary, mechanical allodynia and cold allodynia, but not hyperalgesia, were developed in mice with an inoculation into the foot. Sometimes, mirror-image pain was developed in these animals. These results suggest that carcinoma cells injected into the foot of mice may develop severe chronic pain related to cancer. This animal model of pain would be useful to elucidate the mechanisms of cancer pain in humans.
Animals ; *Behavior, Animal ; Bone and Bones/pathology ; Carcinoma, Hepatocellular/pathology ; Cell Line, Tumor ; Cold ; Disease Models, Animal ; Foot ; Liver Neoplasms/pathology ; Male ; Mice ; Mice, Inbred C3H ; Neoplasm Invasiveness ; Neoplasm Transplantation ; Neoplasms/*complications ; Pain/*etiology/physiopathology/*psychology ; Pain Threshold ; Physical Stimulation ; Research Support, Non-U.S. Gov't ; Thigh