Posterior sacral foramina

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Bone: Posterior sacral foramina

Sacrum, dorsal surface. Posterior sacral foramena labeled at right.)
Latin	foramina sacralia posteriora
Gray's	subject #24 108

Lateral to the articular processes of the sacrum are the four posterior sacral foramina (or dorsal sacral foramina); they are smaller in size and less regular in form than the anterior, and transmit the posterior divisions of the sacral nerves.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

Bones of torso (TA A02.2,3, GA 2.96–128)

Vertebra

General structures	body of vertebra, vertebral arch (pedicle, lamina, vertebral notch), foramina (vertebral, intervertebral), processes (transverse, articular/zygapophysis, spinous), spinal canal

Cervical vertebrae	Uncinate process of vertebra · Transverse foramen · Anterior tubercle · Carotid tubercle · Posterior tubercle C1 (lateral mass, anterior arch, posterior arch), C2 (dens), C3, C4, C5, C6, C7

Thoracic vertebrae	T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 costal facets (superior, inferior, transverse) · Uncinate process of vertebra

Lumbar vertebrae	L1, L2, L3, L4, L5, processes (accessory, mammillary)

Sacrum	Base: sacral promontory · ala of sacrum Lateral surface: sacral tuberosity · pelvic surface (anterior sacral foramina) Dorsal surface: posterior sacral foramina · median sacral crest · medial sacral crest · lateral sacral crest · sacral canal (sacral hiatus)

Coccyx	Coccygeal cornu

Thoracic skeleton

Rib	specific ribs (1, 2, 9, 10, 11, 12, true – 1–7, false – 8–12, floating – 11–12) · parts (Angle, Tubercle, Costal groove, Neck, Head)

Sternum	Suprasternal notch, Manubrium, Sternal angle, Body of sternum, Xiphisternal joint, Xiphoid process

Thoracic cage	Superior thoracic aperture · Inferior thoracic aperture · Intercostal space · Costal margin · Infrasternal angle

M: BON/CAR

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