![]() ![]() The ASYM group seemed to have compensated for their altered somatosensory input to achieve similar functional levels as the SYM group. Analyzing the frequency content of the postural sway using wavelet analysis (a modern, nonlinear signal processing method) shed further light: the standing postural sway in the ASYM group was skewed toward lower frequency movement (ultralow frequency content, anteroposterior: 6.7% in ASYM, 4.7% in SYM, P = 0.01 medial-lateral: 4.2% in ASYM, 3.4% in SYM, P = 0.045). Both groups were compared on the various measures using Welch t tests.Īlthough the ASYM group had 26% greater anteroposterior postural sway than the SYM (P < 0.01), both groups did not differ on postural sway velocity, gait speed, and neck pain intensity. Other measures included habitual, fast-paced gait speed and neck pain. Standing postural control was characterized by the center-of-pressure (CoP) movements measured using a Balance Board. Using the cervical range-of-motion device to assess upper cervical spine ROM via the cervical flexion-rotation test, we classified 54 older adults with neck pain (30 females mean age, 66 yr) into the (1) symmetrical group (SYM n = 20 ≤5° side-to-side difference) or (2) asymmetrical group (ASYM n = 34 >5° difference). However, it remains unclear whether the upper cervical spine rotation ROM asymmetry is associated with postural stability. Previous research has suggested that the upper cervical spine plays an important role in postural stability. The occurrence of ASDeg is associated with a higher postoperative ROM of the segment located above the spondylodesis.Īnterior cervical discectomy with fusion biomechanics cervical spine range of motion.The purpose of this study was to isolate the contribution of cervical spine range-of-motion (ROM) asymmetry to postural control in a group of older adults with neck pain. In patients without ASDeg after ACDF, the mobility of the level above the stabilisation decreases. This change occurs by reducing the neck extension, and its severity depends on the length of the spondylodesis. There was a statistically significant (31%) reduction in total ROM in the segment above ACDF, a 41% reduction in extension ROM of this level in the non-ASDeg group, and a 73% increase in the segmental extension ROM above ACDF in patients with ASDeg.ĪCDF reduces the total ROM of the cervical spine in the sagittal plane. These changes occurred by reducing the extension ROM C2-C7 by 33%, C1-C7 by 31%, and C4-C7 by 12%. ![]() The ROM of C2-C7 decreased by 23%, of C1-C7 by 20%, and of C4-C7 by 38%. The patients were divided into groups depending on the length of spondylodesis and the occurrence of adjacent segment degeneration (ASDeg).Ī statistically significant difference was found in the total ROM of C2-C7, C1-C7 and C4-C7 after ACDF. Range of motion (ROM) was analysed based on X-ray AP, lateral and functional images: C1-C7, C1-C2, C2-C7, C1-C4, C4-C7, and segments adjacent to the stabilisation. The study was divided into two stages: preoperative and postoperative. The aim of this study was to assess changes in global and segmental mobility of the cervical spine after ACDF.Ģ8 patients who underwent ACDF for cervical spondylosis were examined. Consequently, their effect on the eventual result of treatment is not fully understood. The biomechanics of the cervical spine after anterior cervical discectomy with fusion (ACDF), and in particular changes in its global mobility, are phenomena that have not yet been sufficiently studied. ![]()
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