Ashish Stephen Macaden, (2011) Identifying Primary and Compensatory Abnormalities using Single and Double Limb Support Phase Gait Analysis. Masters thesis, Christian Medical College, Vellore.
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Abstract
This study describes biomechanical forces on bipedal gait in 2 phases - on both limbs in double limb support (DLS) and while on one limb is in single limb support (SLS) with the opposite limb in swing. Primary abnormalities are muscle activity abnormalities which directly cause abnormalities in gait. Secondary abnormalities are compensatory muscle activities which try and correct primary abnormalities. This study describes kinetic, kinematic and dynamic EMG characteristics of DLS and SLS using 36 gait data cycles from 18 gait collections. DLS/SLS analysis is used to identify primary and secondary abnormalities in gait. The stability function of DLS is commonly affected by knee and ankle power absorption and this is due to a combination of impaired voluntary control at the knee in DLS1 and spasticity at the ankle in DLS2. The primary abnormality in SLS is spasticity but this spasticity might actually be compensatory or beneficial. Swing is characterized by mostly normal kinematic, EMG and kinetic activity. The hip is relatively spared especially with regards to EMG and range of movement. DLS/SLS analysis is a useful tool in diagnosing primary and secondary abnormalities in gait. CONCLUSIONS: 1. SLS/DLS analysis may be a useful technique to identify abnormalities caused by one limb upon the other at the same point in time and to differentiate between primary and secondary abnormalities of gait. 2. The stability function of double limb support phase is commonly affected by knee and ankle power absorption and this is due to a combination of impaired voluntary control at the knee and spasticity at the ankle in DLS. 3. DLS1 absorption abnormalities are primarily at the knee and are probably due to impaired voluntary control. 4. DLS2 absorption abnormalities are primarily at the ankle and are probably due to spasticity and co-contraction. 5. The primary abnormality in SLS is spasticity but this spasticity might actually be compensatory or beneficial. 6. Swing is characterized by mostly normal kinematic, EMG and kinetic activity. 7. The hip is relatively spared especially with regards to EMG and range of movement. 8. A larger study with randomisation and blinding if possible is needed to confirm the findings of this study. This study will help in calculation of power and appropriate sample size required.
| Item Type: | Thesis (Masters) |
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| Additional Information: | Reg.No.20109002 |
| Uncontrolled Keywords: | SLS/DLS analysis, Identifying Primary and Compensatory Abnormalities, Single and Double Limb Support Phase Gait Analysis. |
| Subjects: | MEDICAL > Physical Medicine and Rehabilitation |
| Depositing User: | Subramani R |
| Date Deposited: | 23 Mar 2020 14:38 |
| Last Modified: | 23 Mar 2020 14:38 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/12412 |
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