Infrasternal angle

Infrasternal angle
The human rib cage.
The thorax from the right.
Details
Identifiers
Latin	angulus infrasternalis
TA98	A02.3.04.008
TA2	1103
FMA	7573
Anatomical terminology [edit on Wikidata]

The lower opening of the thorax is formed by the twelfth thoracic vertebra behind, by the eleventh and twelfth ribs at the sides, and in front by the cartilages of the tenth, ninth, eighth, and seventh ribs, which ascend on either side and form an angle, the infrasternal angle or subcostal angle, into the apex of which the xiphoid process projects.

Pregnancy causes the angle to increase from 68° to 103°.^[1]

References

This article incorporates text in the public domain from page 118 of the 20th edition of Gray's Anatomy (1918)

^ Campbell LA, Klocke RA (April 2001). "Implications for the pregnant patient". Am. J. Respir. Crit. Care Med. 163 (5): 1051–4. doi:10.1164/ajrccm.163.5.16353. PMID 11316633.

Bones of the torso

Vertebrae

General structure	Body Arch pedicle lamina notch Vertebral foramen Intervertebral foramen Processes transverse articular spinous Spinal canal
Cervical vertebrae	Uncinate process of vertebra Transverse foramen Anterior tubercle Carotid tubercle Posterior tubercle Atlas lateral mass anterior arch posterior arch Axis dens Vertebra prominens
Thoracic vertebrae	Costal facets superior inferior transverse Uncinate process of vertebra
Lumbar vertebrae	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	none

Thorax

Rib cage	Ribs true ribs false ribs floating ribs 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 Intercostal space Costal margin Infrasternal angle