At the lumbar region independent physiological movements are not possible and always there are combination of movements. These movements are called as coupling movements.
More appropriately it is defined by Panjabi et al,1992 as follows.
Coupled motion is the rotation or translation of a vertebral body about or along one axis that is consistently associated with the main rotation or translation about another axis (Panjabi et al., 1992). During movement, translation occurs when movement is such that all particles within that segment move in the same direction with the same velocity (Panjabi et al., 1992). With movement, rotation occurs as a spinning or angular
displacement ofth e vertebral body around some axis.
Several researchers have commented about it
(Lovett (1905), Fryette (1954) ,Stoddard (1959),Kapandji (1974) and Rolander (1966) )and they have described about it.
There is a saying " seeing is believing" and at MTFI being the forefront contributor to the research in manual therapy we took this video fluoroscopy of lumbar region at the operation theatre of the orthopedic dept, Datta meghe institute of medical sciences,Wardha. The study was done by Prof.Mohanty, President,MTFI and Dr.Shamla Pazare of Ravi Nair Physiotherapy College, Wardha.
You can see in the video clearly the rotation of the lumbar region associated with the side flexion.
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