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Paper Information

Journal:   TEHRAN UNIVERSITY MEDICAL JOURNAL (TUMJ)   2004 , Volume 62 , Number 8; Page(s) 617 To 629.
 
Paper: 

THE EFFECTS OF DIFFERENT ANGLES OF LUMBO- SACRAL ON ISOMETRIC AND DYNAMIC TORQUES OF TRUNK MUSCLES IN HEALTHY SUBJECTS

 
 
Author(s):  BAGHERI H., TALEBIAN S., ALIAEI GHOLAM REZA, HADIAN MOHAMMAD REZA, JALAEI SHOHREH, MOHAMMADI A.
 
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Abstract: 

Background: Trunk muscles have a major role in stability and integrity of spinal column. Quantitative recordings of muscle performance are basic components of rehabilitation program. Recording methods of muscle force are isotonic, isokinetic or isoinertial. Recordings with isostation 8200 apparatus are more similar to normal body movements. Up to now, because of sagita1plane locking in isostation B200, all of isometric functional recordings have been done in erect position of trunk (0 degree). Pay attention to noticeable effect of posture on the trunk muscles in activity, more investigations in this field are necessary. In order to do experiments, a special screw was designed; the main goal of this research was to study the effect of (0, 15, 30,45) degrees of trunk flexion on the isometric and dynamic torques.
Materials and Methods: 53 healthy male subjects 24.72 (6.01) years old, participated in This semi-experimental research. After setting up position of subjects in B200 isostation apparatus, they were done five times dynamic movements in sagital plane and performing 3 times isometric contractions in flexion and extension directions respectively for 10 seconds, all data were stored in a floppy disk.
Results: Paired Hest, indicated significant differences two by two between all isometric variables in 4 positions separately (P<0.01). ANOVA tests showed significant differences between all means of flexion and extension torques (P<0.01).
Conclusions: Extension torques of trunk muscles were higher in all positions (0, 15, 30, and 45) degrees in comparison with flexion torques. Isometric extension and flexion torques increased linearly with increasing of trunk flexion positions. Relative differences of augmentation in flexion torques were more than extension due to upper trunk weight, gravity, hip flexor muscles and particularly stability of trunk in B200 apparatus.

 
Keyword(s): ISOSTATION B200,DYNAMIC, ISOMETRIC, ANGLES OF TRUNK, LUMBO-SACRAL JOINT
 
References: 
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