Title Contribution of Sensorimotor Integration to Spinal Stabilization in Humans Authors
نویسندگان
چکیده
The control of upper body (UB) orientation relative to the pelvis in the frontal plane was characterized by analyzing responses to external perturbations consisting of continuous pelvis tilts (eyes open and eyes closed) and visual surround tilts (eyes open) at various amplitudes. Lateral sway of the lower body was prevented on all tests. UB sway was analyzed by calculating impulse-response functions (IRFs) and frequency response functions (FRFs) from 0.023 to 10.3 Hz for pelvis tilt tests and FRFs from 0.43 to 1.5 Hz for visual tests. For pelvis tilt tests, differences between FRFs were limited to frequencies below 3 Hz and were dependent on stimulus amplitude. IRFs were nearly identical across all pelvis tilt tests for the first 0.2 s, but showed amplitude-dependent changes in their time course at longer time lags. The availability of visual orientation cues (eyes open compared to eyes closed) had only a small effect on the UB sway during pelvis tilt tests. This small effect of vision was consistent with the small UB sway evoked on visual tilt tests. Experimental results were interpreted using a feedback model of UB orientation control that included time-delayed sensory integration, short-latency reflexive mechanisms, and intrinsic biomechanical properties of the UB. Variation in model parameters indicated that subjects shifted toward reliance on vestibular information and away from proprioceptive information as pelvis tilt amplitudes increased. For visual tilt stimuli, model parameters indicated that subjects shifted toward reliance on vestibular and proprioceptive information and away from visual information as the stimulus amplitude increased.
منابع مشابه
Invited Review HIGHLIGHTED TOPIC Neural Control of Movement Sensorimotor integration at spinal level as a basis for muscle coordination during voluntary movement in humans
Nielsen, Jens Bo. Sensorimotor integration at spinal level as a basis for muscle coordination during voluntary movement in humans. J Appl Physiol 96: 1961–1967, 2004; 10.1152/japplphysiol.01073.2003.—Spinal reflexes have traditionally been treated as separate from voluntary movements. However, animal experiments since the 1950s and human experiments since the 1970s have documented that sensory ...
متن کاملEffect of spinal stabilization exercises to reduce urinary incontinence in the elderly
Urinary incontinence has an increasing process among aged women and its statistics in women in The Home for the Elderly is more than others. The purpose of this study is to investigate effect of 4 weeks Spinal Stabilization exercises on urinary incontinence of the elderly people. In this study, participants are elderly women from age of 50 to 70 years old (67±11kg and BMI of 27±4kg/m2), who wer...
متن کاملIn Tribute: Farshid Mohammadi, PT, PhD, Proprioception and Sensorimotor Integration in Parkinson’s Disease
متن کامل
Contribution of Surgery in Solitary Plasmacytoma of Spine; A Case Report
Solitary plasmacytoma of bone is a rare malignant tumor mostly involving the axial skeleton. The tumor occurs in middle- aged or elderly people (mean age: 55 years) and has a high risk of progression to multiple myeloma. Radiotherapy is the preferred treatment for this disease. We report a case of recurrent solitary plasmacytoma of the fourth lumbar vertebra in a 35-year-old male. The patient s...
متن کاملEffect of Physiological Noise on Thoraco-lumbar Spinal Cord FMRI in 3T Magnetic Field
Introduction: Functional MRI methods have been used to study sensorimotor processing in the Spinal cord. However, these techniques confront unwanted contributions to the measured signal from the physiological fluctuations. For the spinal cord imaging, most of the challenges are consequences of cardiac and respiratory movement artifacts that are considered as significant sources of noise, especi...
متن کامل