Flashcards in Thoracic Anatomy Deck (54)
What is the thoracic cage made of?
12 thoracic vertebrae
Twelve pairs of ribs
What are the anatomical parts of the sternum?
Manubrium, body, xiphoid
What does the manubrium articulate with?
1st ribs, part of the 2nd rib, and body of sternum
What type of joint is the body-manubrium joint of the sternum?
What does the body articulate with?
Ribs 2 to 6 via synovial joints
What type of joint joins the body and xiphoid of the sternum?
What may ribs be classified as?
Which ribs are vertebrosternal?
What ribs are vertebrochondral ribs?
What ribs are vertebral?
Which ribs are considered typical?
What features are on the head of a typical rib?
An upper and lower demi-facets
What features are on the neck of a typical rib?
Crest for the superior costotransverse ligament
What features are on the tubercle of a typical rib?
Facet for the transverse process and a rough part for the lateral costotransverse ligament
What is between the tubercle and shaft of a typical rib?
What characteristics does the upper border of the shaft of a typical rib have?
It is smooth and rounded
What characteristics does the lower border of the shaft of a typical rib have?
Sharp and shelters the costal groove
Which ribs are atypical?
1st, 2nd, 10th, 11th, 12th
What is unique about rib 1?
Only 1 articular facet
Additional tubercle for anterior scalene
Has no costal grove, but a groove for the subclavian artery
What is unique about rib 2?
Has a large rough tuberosity for the attachment of serratus anterior
What is unique about ribs 10-12?
They only posess one facet head
What is the muscle fiber orientation of the intercostal muscles?
External - downwards and medially
Internal - upwards and medially
Innermost - upwards and medially
Where does the neurovascular bundle lie in the intercostal space?
Internal and innermost intercostal muscles
Where does the intercostal vein drain?
Azygos venous system
Where does the intercostal artery receive blood from?
Internal thoracic artery and the thoracic aorta
What is the intercostal nerve a branch of?
The ventral ramus of a thoracic spinal nerve
What covers the intercostal space externally and internally?
Skin, Parietal pleura
What structure is the breast a modified version of?
Apocrine sweat gland
Where is the breast located?
In superficial fascia mostly, the tail is under the deep fascia of the axilla