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Table 2 Analysis of linear Craniometric Parameters of Posterior Cranial Fossa

From: Morphometric analysis of posterior cranial fossa and foramen magnum and it’s clinical implications in craniovertebral junction malformations: a computed tomography based institutional study in a tertiary care hospital of northern part of India

Linear Craniometric Parameters of Posterior Cranial Fossa

Controls (n = 120)

Mean ± SD

Range

Twinning line (mm){TwL}

97.25 ± 3.21

91.3–104.1

McRae line (mm)

32.26 ± 1.84

28.3–35.9

Clivus length (mm)

41.59 ± 1.99

36.8–49.4

IOP-O line (mm)

43.9 ± 2.03

36.8–49.6

Chamberlain line (mm)

75.51 ± 3.66

67–84

Klaus’ index (mm)

44.57 ± 2.27

36.4–49.9

Height of posterior fossa (mm){h}

34.37 ± 1.46

32–36.9

h/TwL

0.35 ± 0.02

Posterior fossa volume (cm3)

162.52 ± 7.64

143.78–175.56

  1. IOP-O: Internal Occipital Protuberance-Opisthion