Thoracic or Dorsal Region Flashcards
Which thoracic segments are considered the typical thoracics?
T2-T8 segments
Which thoracic segments are considered the atypical thoracics?
T1; T9-T12
What features will allow discrimination between T2-T4 and T5-T8 segmental groups?
The vertebral body, transverse process, articular process and spinous process
What is the name given to the left side appearance of the vertebral body of T5-T8?
The aortic impression
What is the height pattern of the typical thoracic vertebral body?
The posterior height is greater than the anterior height by 1-2mm
What is the principal cause of the posterior curve of the thoracic spine?
The vertebral body height differences
In terms of the anterior-posterior curves of the vertebral column, what direction will the thoracic spine face?
Posterior
What is another way of naming a posterior curve pattern?
Kyphotic curve
What joints are identified at the vertebral body of a typical thoracic?
Vertebral body to ALL at the epiphyseal rims; Vertebral body to PLL at the epiphyseal rims; Vertebral body to vertebral body via intervertebral discs; vertebral body to capitulum of a rib (costocentral joint)
What joint classifications are identified at the vertebral body of a typical thoracic?
fibrous (amphiarthrosis) syndesmosis, cartilaginous (amphiarthrosis) symphysis, and synovial plane (diarthrosis arthrodia)
How many synovial joints are formed at the vertebral body of a typical thoracic?
4
How many symphysis joints are formed with the vertebral body of a typical thoracic?
2
How many joints are formed at the vertebral body of a typical thoracic?
Typically 10 (14 if costocentral stellate/radiate ligaments are included) "10 + 4"
Which of the demi-facets on the vertebral body of a typical thoracic is larger?
The superior costal demi-facet
What feature will provide assistance in maintaining the stability of the IVF in the typical thoracics?
The costocentral joint or ribs
What is the rib - vertebral body combination at the IVF for the ___ nerve? Let’s use the T6 nerve.
The inferior costal demi-facet of T6 will joint with the superior articular surface of the head of the 7th rib
The superior costal demi-facet of T7 will joint with the inferior articular surface of the head of the 7th rib
What ligaments support the costocentral joint?
The costocentral stellate/ radiate ligament and the costocentral interarticular or intra-articular ligament
What does the costocentral intra-articular or interarticular ligament connect to?
The interarticular or intra-articular crest of the head of the rib and the intervertebral disc
What is the size relationship between the articulating surface of the head of the rib and the costal demi-facet surface?
The rib surface is greater than the costal demi-facet surface
