Morphometry of Vertebral Pedicles: a Comprehensive Anatomical Study in the Lumbar Region
Morfometría de los Pedículos Vertebrales: Un Exhautivo Estudio Anatómico en la Región Lumbar
*Prakash; *Latha V. Prabhu; *Rajanigandha Vadgaonkar; *Mángala M. Pai; *Anu V. Ranade & **Gajendra Singh
* Department of Anatomy, Centre for
Basic Sciences, Kasturba Medical College, Bejai, Mangalore,
Karnataka,Pin: 575004. India.
** Department of Anatomy, Institute of Medical Sciences, Bañaras
Hindu University, Varanasi, U. P. Pin: 221005. India.
An open access article from Int J. MorphoL, 25(2):393-406, 2007.
SUMMARY: This comprehensive
anatomical study on bones and X-rays regarding pedicles of lumbar
vertebrae was performed in two parts. In the first part of the present
work direct gross measurements of 3 different diameters (v, d, and 1)
of both the pedicles of LI to L5 vertebrae (200 male and 200 female)
were recorded through sliding vernier caliper. In the second part plain
anteroposterior radiographs of the lumbar spine from 500 individuals
(250 males and 250 females) were collected, and divided in 6 age groups
and 2 different diameters (t and h) were recorded. The minimum
horizontal diameter (d) of both the pedicles increased from LI to L5.
Whereas, the vertical height (v) of both the pedicles increased from LI
to L2, decreased from L2 to L3 and increased from L3 to L5. The
anteroposterior length (1) increased bilaterally from LI to L2 and
decreased from L2 to L5. All the aforementioned parameters were greater
in male than corresponding vertebrae of female. Same trends were
confirmed by the radiological study. The maximum horizontal diameter
(t) of pedicles on both sides of vertebrae was significantly greater in
females in less than 20 years of subjects, due to early pubertal growth
spurt, whereas it was significantly greater in males in rest of all the
age groups at all segments of vertebral spine. The maximum vertical
height (h) of both the pedicles was significantly greater in males of
age groups greater than 30 years from LI to L5.
KEY WORDS: Pedicle; Vertebra lumbar; Spine; Morphometry.