Unit Three Ribs Flashcards
Function of ribs
Serve to protect the underlying thoracic viscera (organs) while providing attachment for the muscles
How many pairs of ribs
12
The first 7 pair of ribs attach to costal cartilage that then attaches to
Sternum directly
What are the true ribs
First 7 pairs
False ribs articulate with
Articulate with costal cartilage of the ribs above
What are the false ribs
Ribs 8, 9 and 10
Which ones are floating ribs
11 an 12
Do floating ribs attach to costal cartilage
No
Sternum is made up of
Manubrium, body and xyphoid process
What are the four parts of a typical rib
Head of rib, neck of rib, tubercle of rib, and shaft/body
The head of the rib articulates with
Vertebral bodies and disc
What is in the center of the head of the rib
Crest
Where is the neck of the rib
Between the head and the tubercle
Function of neck of rib
Attachment for muscles and ligaments
The tubercle of a typical rib articulates with
The TVP of the vertebra
The shaft or the body of the rib extends from
Tubercle of the rib to the costal cartilage
How does the shaft of the rib curve
Anteriorly and inferiorly
Where is the largest curve of the rib
At the angle of the rib
Which ribs are typical ribs
T3 through T9
Which are Peculiar ribs
T1, T2, 10, 11, 12
Why is T1 rib peculiar
Short, flat, strong and lies almost horizontally with little to no angulation
Why is T2 rib peculiar
Tuberosity on the superior surface for the attachment of the serratus anterior muscle. It’s 2x the size of the rib #1
Why is T10 rib peculiar
Only a single face and no crest on the head of the rib
Why is T11 rib peculiar
Only a single face and no neck or tubercle, no TVP attachments
Why is T12 rib peculiar
Only a single facet, no neck or tubercle, no TVP attachment
The ribs articulate with the vertebra at what two places
Costocoporeal articulation and costotransverse articulation
What is the costocoporeal articulation
The head of the rib with the lateral costal facets on the vertebral body
What is the costotransverse articulation
At the tubercle of the rib with the fovea costalis transversalis of the TVP of the vertebra
In the thoracic spine, the ribs articulate with vertebrae at both the
Body and the TVPs
Where are the facets on the T2-9 thoracic vertebra for the costovertebral joints
Facets superiorly and inferiorly at the posterior aspect of the body
What vertebral bodies have only one costal facet
T1, 10, 11, 12
What are the three ligaments fo the costcoporeal articulation
Intraarticular, articular capsule and radiate ligament
Where is the intraarticular ligament
From the crest of the head of the rib to the intervertebral disc
The intraarticular ligament separates the
Articular facet into 2 parts (superior and inferior)
Where is the articular capsule in the costocoporeal articulation
Surrounds the joint and glands into the intervertebral disc
AKA of radiate ligament
Triradiate or stellate ligament
What are the three parts of the radiate ligament
Superior, middle and inferior fasciculus
What are the four ligaments of the costotransverse articulation
Articular capsule, superior costotransverse ligament, costotransverse ligament, and lateral costotransverse ligament
Where is the articular capsule of the costotransverse articulation
Surrounds joint between the TVP and rib
Where is the superior costotransverse ligament
Anterior and posterior part from neck of the rib to inferior border of the TVP above
AKA of costotransverse ligament
Middle costotransverse, interosseous or ligament of the neck of the rib
Where is the middle costotransverse ligament
From posterior part of the neck of the rib to the anterior part of the adjacent TVP of the vertebra
Where is the lateral costotransverse ligament
From the tip of the TVP to the tubercle of the rib just behind where it articulates
Where is the spine has the greatest rotation
Thoracic spine
Why is there least ROM overall in T spine
Due to overlapping spinous process, attachment of ribs to sternum and kyphotic curve, thinner intervertebral discs
What movements are there in the thoracic spine
Flexion, lateral flexion, rotation and very little extension
Where is the superior costotransverse ligament
Anterior and posterior part from neck of the rib to inferior border of the TVP above
AKA of costotransverse ligament
Middle costotransverse, interosseous or ligament of the neck of the rib
Where is the middle costotransverse ligament
From posterior part of the neck of the rib to the anterior part of the adjacent TVP of the vertebra
Where is the lateral costotransverse ligament
From the tip of the TVP to the tubercle of the rib just behind where it articulates
Where is the spine has the greatest rotation
Thoracic spine
Why is there least ROM overall in T spine
Due to overlapping spinous process, attachment of ribs to sternum and kyphotic curve, thinner intervertebral discs
What movements are there in the thoracic spine
Flexion, lateral flexion, rotation and very little extension
