IV. Basic Osteology of the Vertebral Column, Sternum, and Ribs Flashcards
What is the name given to the front of the C1 bony ring?
the anterior arch
What osseous modification is observed to the front of the anterior arch of C1?
the anterior tubercle
What is observed on the back of the anterior arch of C1?
the fovea dentis
What attaches behind the anterior arch of C1?
the lateral mass
What is the name given to the upper margin of the lateral mass of C1?
the superior articular process
What does the superior articular process of C1 support?
the superior articular facet
What is the name given tot he lower margin of the lateral mass of C1?
the inferior articular process
What does the inferior articular process of C1 support?
the inferior articular facet
What is the name of the rounded elevation of the medial aspect of the lateral mass of C1?
tubercle for the transverse atlantal ligament
What attaches to the back of the lateral mass of C1?
the posterior arch
What is identified in the midline at the back of the posterior arch of C1?
the posterior tubercle
What superior surface modification of the posterior arch of C1 is present near the lateral mass?
groove/sulcus for the vertebral artery
What superior surface modification is present near the posterior tubercle of the posterior arch of C1?
the arcuate rim
What attaches to the arcuate rim of the posterior arch of atlas and to the superior articular process of the lateral mass of atlas?
a complete ponticulus posticus
Based on the amount of bony union between the superior articular process and the arcuate rim of C1 what structure will form?
an incomplete ponticulus posticus or a complete ponticulus posticus
What names are given to the opening formed by the ponticulus posticus?
arcuate foramen or retroarticular canal
What is observed on the undersurface of the posterior arch of C1?
the inferior vertebral notch
What is the name given to the triangular area of bone arising from the lateral mass of C1?
the transverse process
What is the name given to the anterior part of the transverse process of C1?
the costal element
What is the name given to the posterior part of the transverse process of C1?
the true transverse process
What is the distal most part of the transverse process of C1?
the posterior tuberccle
What opening is identified in the transverse process of C1?
the transverse foramen
What unique vertebral body modification is characteristic of C2?
the dens or odontoid process
What surfaces are present on the odontoid process of C2?
facet for fovea dentis, groove for transverse atlantal ligament, attachment sites for the alar ligaments, attachment site for the apical-dental ligament
What feature is identified on the anterior surface of the odontoid process of C2?
facet for fovea dentis
What feature is identified on the posterior surface of the odontoid process of C2?
groove for transverse atlantal ligament
What feature is identified on the superolateral margins of the odontoid process of C2?
attachment sites for the alar ligaments
What feature is identified on the tip of the odontoid process of C2?
attachment site for the apical-dental ligament
What feature is identified on the anterior surface of the vertebral body of C2?
the longus colli muscle attachment
What features are present at the inferior part of the vertebral body of C2?
the inferior epiphyseal rim and cancellous bone
What feature is identified on the anterior surface of the inferior epiphyseal rim of C2?
the anterior lip
What feature is identified on the posterior surface of the inferior epiphyseal rim of C2?
the posterior lip
What features are present at the lateral margins of the inferior epiphyseal rim of C2?
right and left lateral grooves
What features arise from the posterolateral margins of the vertebral body of C2?
the pedicles
What lies on the upper surface of the pedicle of C2?
the superior articular process
What covers the upper surface of the superior articular process of C2?
the superior articular facet
What is the location of the superior vertebral notch of C2?
on the lamina-pedicle junction
What feature is identified on the lower surface of the pedicle of C2?
the inferior vertebral notch or inferior vertebral incisure
What is the location of the inferior articular process of C2?
on the lamina-pedicle junction behind the inferior vertebral notch
What osseous parts of the typical cervical transverse process are present at C2?
costal element, posterior tubercle, and true transverse process
What is the name given to the anterior part of the transverse process of C2?
the costal element
What is the name given to the posterior part of the transverse process of C2?
the true transverse process
What is the distal most part of the transverse process of C2?
the posterior tubercle
What opening is identified in the transverse process of C2?
the transverse foramen
What is the characteristic appearance of the C2 spinous process in humans?
it is bifid
What are the modifications of the superior epiphyseal rim of a typical cervical?
anterior groove, posterior groove, right and left uncinate processes
What are the names of the lateral modifications of the superior epiphyseal rim of a typical cervical?
uncinate process, unciform process, uncovertebral process, uncus or lateral lip
What is the anterior modification of the superior epiphyseal rim of a typical cervical?
anterior groove
What is the posterior modification of the superior epiphyseal rim of a typical cervical?
posterior groove
What are the modifications of the inferior epiphyseal rim of a typical cervical?
anterior lip, posterior lip, right and left lateral grooves
What is the name given to the lateral modifications of the inferior epiphyseal rim of a typical cervical?
lateral groove
What is the name given to the anterior modification of the inferior epiphyseal rim of a typical cervical?
anterior lip
What is the name given to the posterior modification of the inferior epiphyseal rim of a typical cervical?
posterior lip
What attaches to the posterolateral margin and in the center of a typical cervical vertebral body?
the pedicle
What surface feature is located at the upper margin of the pedicle?
superior vertebral notch
What surface feature is located at the lower margin of the pedicle?
inferior vertebral notch
What bony feature is attached to the posterior end of the pedicle?
the articular pillar
What is located at the top of the articular pillar?
the superior articular process
The superior articular process will provide support for what bone feature?
the superior articular facet
What is located at the bottom of the articular pillar?
the inferior articular process
The inferior articular process will provide support for what bone feature?
the inferior articular facet
What is the name of the surface feature observed between the ends of hte articular pillar?
the groove/sulcus for the dorsal ramus of a cervical spinal nerve
What bone feature is attached to the posterior part of the articular pillar?
the lamina
What is the direction of projection of the cervical lamina?
posteromedially
What ligament attaches tot he lamina a typical cervical?
ligamentum flavum
Ossification of the ligamentum flavum at the attachment site on the lamina will result in what feature?
para-articular processes
To what parts of the typical cervical vertebra is the transverse process attached?
the vertebral body and the articular pillar
List, in order, the osseous parts of the typical cervical vertebra transverse process beginning at the vertebral body.
costal element, anterior tubercle, costotransverse bar, posterior tubercle, true transverse process
What is the distal modification of the costal element of a typical cervical vertebra?
the anterior tubercle
What is the distal modification of the true transverse process of a typical cervicals?
the posterior tubercle
What bony feature connects the anterior and posterior tubercles of a typical cervical transverse process?
costotransverse bar or intertubercular lamella
What is the name given to the superior margin of the costotransverse bar?
sulcus for the ventral primary ramus of a cervical spinal nerve
What is the name given to the modification of the anterior tubercle of the C6 transverse process?
the carotid tubercle
What is the usual condition for the Caucasian typical cervical spinous process?
they are bifid
What is the usual condition for the African-American typical cerivcal spinous process?
they are non-bifid
What is the osseous modification at the distal end of the spinous process?
the spinous tubercle
What surfaces are present on the superior epiphyseal rim of the vertebral body of C7?
anterior groove, posterior groove, right and left uncinate processes
What is the appearance of the inferior surface of the vertebral body of C7?
typically flat, lacking anterior and posterior lips characteristics of the typical cervicals
What are the osseous parts of the transverse process of C7?
costal element, anterior tubercle, costotransverse bar, posterior tubercle, true transverse process
What are the features of the spinous process of C7?
long, horizontal, nonbifid
What is the outline of the vertebral body of T1 from superior view?
somewhat rectangular with curved anterior margins
What is the appearance of the vertebral body of T1 from the anterior view?
both sides will appear to be scalloped (indented) between the epiphyseal rims
What is the appearance of the superior surface of the vertebral body of T1?
it is somewhat cup-shaped with elevations at the posterior and lateral margin
What may the elevations on the vertebral body of T1 represent?
uncinate process
What is the appearance of the inferior surface of the vertebral body of T1?
typically flate, lacking anterior and posterior lips characteristic of the cervicals
What surfaces are present on the upper and lower margins of the T1 vertebral body?
the right and left superior costal facet and right and left inferior costal demi-facet
What is the position and direction of the pedicle from the vertebral body of T1?
the pedicle arises from the upper third of the vertebral body and projects posterior and slightly laterally
What is the direction of the transverse process at T1?
the transverse process projects nearly straight out laterally
What is present at the tip of the transverse process of T1?
the transverse tubercle
What is present on the transverse tubercle of T1?
the transverse costal facet
What is the orientation of the transverse costal facets for T1?
they face forward and outward
What is the angulation of the spinous process of T1?
the undersurface of the T1 spinous process will be nearly horizontal
What features will allow discrimination between T2-T4 and T5-T8 segmental groups?
the vertebral body, transverse process, articular process and spinous process
On cranial view, what is the outline of the vertebral body for the T2-T4 group?
the vertebral body will have bilaterally convex sides
On cranial view, what is the outline of the vertebral body for the T5-T8 group?
the left side of the vertebral body will be flattened, the right side convex
What is the appearance of the vertebral body from the anterior view for T2-T4?
both sides will appear to be scalloped (indented) between the epiphyseal rims
What is the name given to the left side appearance of the vertebral body of T5-T8?
the aortic impression
What is the aortic impression?
the flattening of the superior and inferior epiphyseal rims on the left isde of the vertebral body of T5-T8 which gives the vertebral body a less scalloped or less indented appearance on that side
What part of the vertebral body is most influenced by the aorta at T5-T8?
the left side of the superior and inferior epiphyseal rims
What synovial joint surfaces are present on the vertebral body of a typical thoracic?
the right and left superior and the right and left inferior costal demi-facets
Which of the demi-facets on the vertebral body of a typical thoracic is larger?
the superior costal demi-facet
What is the position and direction of the pedicle from the typical thoracic vertebral body?
the pedicle arises from the upper third of the vertebral body and projects posterior and slightly laterally
What is the appearance and position of the lamina in a typical thoracic?
the lamina is short, broad, and thick and lies next to the spinous process
What is the direction of the transverse process in the typical thoracics?
the transverse process projects more posterior with each inferior vertebra
What is present at the tip of the transverse process of a typical thoracic?
the transverse tubercle
What is the distance between the transverse tubercles in the typical thoracic region?
from T2 each transverse diameter becomes shorter as the transverse processes angle more posterior
What is present on the transverse tubercle of a typical thoracic?
the transverse costal facet
What is the orientation of the transverse costal facets for T2-T6?
they face forward and outward
What is the orientation of the transverse costal facets for T7-T8?
they face forward, outward, and upward
How can you distinguish between a T2-T4 from T5-T8 segment using the articular process?
at T2-T4 the width between the superior articular processes is greater than the width between the inferior articular processes of that vertebra
at T5-T8 the width between the superior articular processes is equal to or the same as the width between the inferior articular processes of that vertebra
How do the transverse diameters of the articular processes compare in the T2-T4 region?
the superior articular process transverse diameter is greater than the inferior articular process transverse diameter for a given segment