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  3. Sacrum

Sacrum

Type
Bone
Japanese
仙骨
Reading
せんこつ
English
Sacrum
Latin
Os sacrum
Main functions
Weight bearing / Protection

Connections

Part of

  • Vertebral column

Articulates with

  • Lumbar vertebrae (L1–L5)
  • Ilium
  • Coccyx

Passage for

  • Cauda equina

Muscles inserting here

  • Coccygeus

Muscles arising here

  • Erector spinae
  • Gluteus maximus
  • Multifidus
  • Piriformis

Connected by

  • Posterior sacroiliac ligament
  • Supraspinous ligament
  • Thoracolumbar fascia

Articles

  • Where is the sacrum? Position of the bone formed by five fused vertebrae and the sacroiliac joints

Also mentioned in

  • Intervertebral disc: nucleus pulposus, annulus fibrosus and position
  • Piriformis: location, action and relation to the sciatic nerve
  • Multifidus: origin, insertion and function
  • Anterior and posterior longitudinal ligaments of the spine
  • Rectum: position, structure, function and English name
  • Where is the ilium? Location, iliac crest, ASIS and muscles of the upper hip bone
  • Posterior sacroiliac ligament: location, short and long parts, and role
  • Spine Basics: How Many Vertebrae, Structure, Functions, and Terminology Explained with 3D Anatomy
  • Erector spinae: iliocostalis, longissimus and spinalis
  • Multifidus: location, how to remember it and English/Latin names
  • Cauda Equina: Location and Role of the Nerve Roots Below the Cord
  • Lumbar vertebrae: the five vertebrae, muscles and lumbar plexus

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