Landmarks on the Sacrum

93

1

sSIJ-CranL

Junction of cranial limit of sacro-iliac joint and iliac crest.

94

1

sSIJ-BrimL

Junction of the auricular surface and the pelvic brim, left side.

95

1

sSIJ-CaudL

Caudal limit of auricular surface.

96

1

sSIJ-CranR

Opposite Junction of cranial limit of sacro-iliac joint and iliac crest.

97

1

sSIJ-BrimR

Junction of the auricular surface and the pelvic brim, right side.

98

1

sSIJ-CaudR

Opposite caudal limit of auricular surface.

99

1

sVertProm

Sacral promontory in the plane of the pelvic inlet. Most cranio-ventral point on the sacral body.

100

1

sVertDors

Most dorsal point on the sacral body.

101

1

sVertLatR

Most lateral point on sacral vertebral joint right.

102

1

sVertLatL

Most lateral point on sacral vertebral joint left.

103

1

sSacTip

Most caudo-ventral tip of the sacrum.

104

1

sCoxTip

Most caudal tip of the coccyx.

105

3

oPirif-SACR

Ventral surface of the right side sacrum between second and third foramen midway between midline of foramen and lateral border.

106

1

oGluMaxInfR

Right infero-lateral angle, marking corner of sacrum (origin of coccygeus) where medial border of sacrum begins to taper towards the coccyx (origin of Gluteus Maximus inferior fibers).

107

1

oGluMaxInfL

Left infero-lateral angle, marking corner of sacrum (origin of coccygeus) where medial border of sacrum begins to taper towards the coccyx (origin of Gluteus Maximus inferior fibers).

108

3

oPirif-SACL

Ventral surface of the left side sacrum between second and third foramen midway between midline of foramen and lateral border (first sacral foramen is most cranial) (origin of Piriformis).