THORACIC CAGE and WALL. SURFACE LANDMARKS. Lines of Orientation. Refer: Text: pp 91-92 (91) Syllabus: p 44 Midsternal line Midclavicular line Anterior axillary line Posterior axillary line. Lines of Orientation. Midaxillary line Scapular line. Surface Landmarks. Jugular notch
Text: pp 91-92 (91)
Syllabus: p 44
Marks rib 2
Lies at level of T4-5 IV disc
Left IC space 5; midclavicular line
Right IC space 2
Important in CPR.
Depression between is the infrasternal fossa.
Xiphisternal joint within the fossa is at the level of the body of T9.
Left IC space 2
Right IC space 5
Left IC space 5
Vertebral level T4-5
Scapular spine is at level of 3rd rib and T2 vertebra.
Inferior scapular angle is at the level of the 7th rib, the spine of T7 or the body of T9.
Superior part is marked by the 7th cartilage.
Inferior part is marked by the 10th cartilage
Synostosis after age 30 in some
= Rib bone + its cartilage
Two articular facets for articulation with costal demifacets on adjacent thoracic vertebrae.
Bony crest between facets for attachment to intervertebral disc.
Narrow portion between head and tubercle.
Articulates with transverse process of vertebra with same number.
Contains superior to inferior:
For insertion of scalenus anterior muscle.
Anterior to tubercle
Posterior to tubercle
(on typical vertebrae (T2 – T9)
First spinous process to be palpated.
Superior costal facet (not a demifacet).
One pair of costal facets located partly on body and partly on pedicle.
One pair of costal facets located on pedicles.
Tubercle articulates with transverse process of same number vertebra.