J Korean Neurosurg Soc.  2017 Sep;60(5):560-566. 10.3340/jkns.2016.1212.002.

Evaluation of Global Sagittal Balance in Koreans Adults

Affiliations
  • 1Department of Neurosurgery, Ewha Womans University College of Medicine, Seoul, Korea. yongcho@ewha.ac.kr

Abstract

OBJECTVIE: The global sagittal postural patterns as characterized by Roussouly classification have been previously described in various ethnicities, there were no studies investigated in Koreans. To analyze the distribution of the global sagittal postural patterns in Korean adults using Roussouly classification, the author prospectively studied.
METHODS
252 asymptomatic Korean adults was recruited. Data was obtained by reviewing the films for each subject. Spinopelvic parameters were measured and sagittal postural patterns were then determined according to Roussouly classification. We compared the data across different ethnicities from our study and a previous study to further characterize Korean sagittal postures.
RESULTS
The subject included 151 males and 101 females, with mean age of 33.2±8.2 years. The average descriptive results were as below: thoracic kyphosis 28.6±7.7°, lumbar lordosis 48.3±10.2°, sacral slope 37.8±5.8°, pelvic incidence 45.1±7.5°, pelvic tilt 9.4±6.7°, spinosacral angle 130.1±5.4°, and sagittal vertical axis 16.25±22.5 mm. 125 subjects among 252 (49.6%) belonged to Roussouly type 3 (namely neutral). There were also 58 (23%), 33 (13.1%), and 36 (14.3) subjects in type 1, 2, and 4 (namely non-neutral), respectively.
CONCLUSION
Enrolling 252 asymptomatic Korean adults, this prospective study found that 49.6% of asymptomatic Korean adults possessed a sagittal posture of Roussouly type 3. All radiologic parameters follows general concept of spinal sagittal balance pattern. Overall, this study might be a basis for further investigation of spinal sagittal balance.

Keyword

Spinal curvatures; Spine; Postural balance

MeSH Terms

Adult*
Animals
Classification
Female
Humans
Incidence
Kyphosis
Lordosis
Male
Postural Balance
Posture
Prospective Studies
Spinal Curvatures
Spine

Figure

  • Fig. 1 Drawings of Roussouly types. Type 1: SS<35°, apex of lumbar lordosis (LL) at middle L5, the spine is hypolordotic and relatively normokyphotic; type 2: SS<35°, apex of LL at base L4, the spine is hypolordotic and hypokyphotic; type 3: 35°45°, apex of LL at base L3, the spine is hyperlordotic and hyperkyphotic. *Apex of lumbar lordosis (inflection point). SS: sacral slope.

  • Fig. 2 Measurement of spinopelvic parameters. C7PL: C7 plumb-line, TK: thoracic kyphosis, LL: lumbar lordosis, SSA: spinosacral angle, SVA: sagittal vertical axis, SS: sacral slope, PT: pelvic tilt, PI: pelvic incidence.


Reference

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