Rehab Centers: Human Pose Recovery Using Wireless Inertial Measurement Units.
Human pose recovery using wireless inertial measurement units.
Filed under: Rehab Centers
Physiol Meas. 2012 Nov 23; 33(12): 2099-2115
Lin JF, Kuli? D
Many applications in rehabilitation and sports training require the assessment of the patient’s status based on observation of their movement. Small wireless sensors, such as accelerometers and gyroscopes, can be utilized to provide a quantitative measure of the human movement for assessment. In this paper, a kinematics-based approach is developed to estimate human leg posture and velocity from wearable sensors during the performance of typical physiotherapy and training exercises. The proposed approach uses an extended Kalman filter to estimate joint angles from accelerometer and gyroscopic data and is capable of recovering joint angles from arbitrary 3D motion. Additional joint limit constraints are implemented to reduce drift, and an automated approach is developed for estimating and adapting the process noise during online estimation. The approach is validated through a user study consisting of 20 subjects performing knee and hip rehabilitation exercises. When compared to motion capture, the approach achieves an average root-mean-square error of 4.27 cm for unconstrained motion, with an average joint error of 6.5°. The average root-mean-square error is 3.31 cm for sagittal planar motion, with an average joint error of 4.3°.
HubMed – rehab
[Role of endoplasmic reticulum stress-related molecule GRP78 in global cerebral ischemia-reperfusion injury aggravated by hypertension in rats].
Filed under: Rehab Centers
Nan Fang Yi Ke Da Xue Xue Bao. 2012 Nov; 32(11): 1675-9
Zhao YN, Li JM, Liu L, Chang XY, Chen CX, Li SX
To observe the changes in the expression of glucose-regulated protein 78 (GRP78) in the hippocampus of normal rats and spontaneously hypertensive rats with cerebral ischemia/reperfusion (IR) and explore the possible role of GRP78 in global cerebral IR injury aggravated by hypertension.Sixty male Wistar-Kyoto (WKY) rats were randomly divided into sham operation group and global cerebral ischemia-reperfusion group(I/R) and a Another 30 male rats with spontaneous hypertension served as hypertensive cerebral ischemia and reperfusion (SHR+I/R) group. Global cerebral ischemia model was established in rats using a modified four-vessel occlusion method. The morphological changes of the neurons in the hippocampal region were observed using HE staining, and GRP78 expression was detected using immunohistochemistry and Western blotting. The behavioral changes of the rats were examined using the Eight-arm Maze.Compared with the rats with sham operation, the rats in I/R group showed a decreased density of surviving neurons in the hippocampus and an increased expression of GRP78, which reached the peak level at 24 h. Compared with that in I/R group, the density of surviving neurons decreased obviously at each time point in SHR+IR group, and GRP78 expression significantly increased at 6 h, followed then by progressive reduction at 24 and 48 h. The rats in SHR+IR group and I/R group showed no significant difference in behavior changes.Hypertension can aggravate global cerebral IR injury by decreasing GRP78 expression and increasing the loss of nerve cells.
HubMed – rehab
A Call to Arms (and Legs): Exercise Prescription for Medical Students.
Filed under: Rehab Centers
PM R. 2012 Nov; 4(11): 914-8
Phillips EM
Exercise to enhance neurocognitive function after traumatic brain injury.
Filed under: Rehab Centers
PM R. 2012 Nov; 4(11): 908-13
Fogelman D, Zafonte R
Vigorous exercise has long been associated with improved health in many domains. Results of clinical observation have suggested that neurocognitive performance also is improved by vigorous exercise. Data derived from animal model-based research have been emerging that show molecular and neuroanatomic mechanisms that may explain how exercise improves cognition, particularly after traumatic brain injury. This article will summarize the current state of the basic science and clinical literature regarding exercise as an intervention, both independently and in conjunction with other modalities, for brain injury rehabilitation. A key principle is the factor of timing of the initiation of exercise after mild traumatic brain injury, balancing potentially favorable and detrimental effects on recovery.
HubMed – rehab
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