MRI による腹臥位からの体幹伸展位における脊椎および仙腸関節の可動域の解析
MRI Analysis of the Range of Motion of Spinal Segments and the Sacroiliac Joint in the Sagittal Plane in the Prone Position with Trunk Extension

Masafumi HATA, Hideyuki USA, Kazuna ICHIKAWA, Sho MITOMO, Daisuke OGAWA, Masashi MATSUMURA, Atsushi SENOO, Hitoshi TAKEI
2015 Rigaku ryohogaku  
Purpose: The purpose of this study was to analyze the range of motion of spinal segments and the sacroiliac joint in the sagittal plane when the trunk moves from the prone to the extension position. Methods: Thirteen asymptomatic female volunteers participated in this study. The prone position with no trunk extension (prone), slight trunk extension, and moderate trunk extension (referred to as the puppy position) were analyzed using magnetic resonance imaging (MRI). The range of motion of the
more » ... of motion of the lower thoracic and lumbar zygapophysial joints (from Th11/12 to L4/5), the lumbosacral joint (L5/ S1), and the sacroiliac joint was investigated. Results: In the slight trunk extension position, Th12/L1 to L3/4 showed more extension than did L4/5 and L5/S1. In the puppy position, Th12/L1 to L4/5 showed more extension than did L5/ S1. Moreover, a larger angle was measured from Th12/L1 to L4/5 in the puppy position than was measured in the slight trunk extension position. There was almost no movement of the sacroiliac joint in either position. Conclusions: This study showed that the primary segments showing extension in the slight trunk extension position were Th12/L1 to L3/4, while those that showed extension in the puppy position were Th12/L1 to L4/5. In addition, Th12/L1 to L4/5 was more extended in the puppy position than in the slight trunk extension position. The sacroiliac joint showed almost no movement in either position.
doi:10.15063/rigaku.10961 fatcat:hb5he3jafrdhpnzld7me475ufm