Lower Frontal/Saggital Proprioceptive Acuity in OA

Higher threshold to detection of passive movement in all directions seen in knee osteoarthritis

FRIDAY, Sept. 16 (HealthDay News) -- Patients with knee osteoarthritis (OA) have reduced proprioceptive acuity in both the sagittal and frontal planes compared with healthy control subjects, according to a study published in the September issue of Arthritis & Rheumatism.

Martha L. Cammarata, Ph.D., from the Rehabilitation Institute of Chicago, and colleagues assessed knee proprioceptive acuity in the frontal and sagittal planes in 13 patients with knee OA and 14 healthy age-matched subjects using the threshold to detection of passive movement (TDPM) tests. The differences in TDPM between the groups and across movement directions were evaluated by repeated-measures analysis of variance. The association of TDPM between and within planes of movement was evaluated by linear regression analyses.

The investigators found that patients with knee OA had significantly higher TDPM for all directions tested. Consistent across all movement directions, the mean differences in TDPM between groups for valgus, varus, extension, and flexion were 0.94, 0.92, 0.93, and 1.11 degrees, respectively. TDPM measures across planes of movement were weakly associated, particularly in patients with knee OA.

"Patients with knee OA exhibited decreased proprioceptive acuity compared with age- and sex-matched healthy control subjects, in both the sagittal and frontal planes," the authors write.

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