Flashcards in 7/29 Questions Exam 1 Deck (26):
Name the areas of cellular differentiation formed within the somite?
What are the names of the successive vertebral columns formed during development?
Migration of a somite pair to surround the notochord forms what developmental feature?
The perichordal blastema
The perichordal blastema gives rise to what processes?
Neural processes and costal processes
What is the name of the artery located between adjacent perichordal blastemae?
What forms between the sclerotomites of a perichordal blastema?
The intrasclerotomal fissure (fissure of von ebner)
The intrasclerotomal fissure (fissure of von ebner) gives rise to what development feature?
the perichordal disc
The union of a dense caudal sclerotomite and a loose cranial sclerotomite from adjacent perichordal blastemae gives rise to what feature?
the vertebral blastema
What vessel will be identified adjacent to the vertebral blastema?
the segmental artery
When will cartilage first form in the membranous vertebral blastema?
beginning in the 6th embryonic week
What is the name given to the replacement of mesoderm by cartilage?
What are the names given to the centers of chondrification within the vertebral blastema?
Neural arch center
Transverse process center
How many centers of chondrification typically appear in the vertebral blastema?
Six..... 2 for the centrum, 2 for the neural arches, 2 for each transverse process
What is the earliest time that centers of ossification appear in the cartilaginous vertebrae?
during the 7th embryonic week
What is the name given to centers of ossification based on time of appearance?
Primary centers appear in utero, secondary centers appear after birth
What is the ratio of primary to secondary centers of ossification for a typical vertebrae?
3 primary centers
5 secondary centers
What are the names of the primary centers of ossification for a typical vertebrae?
centrum centers and neural arch centers
What are the names/locations of the five secondary centers of ossification for a typical vertebrae?
tip of the transverse process, tip of the spinous process, epiphyseal plate centers
What is the range of appearance for secondary centers of ossification of a typical vertebrae?
during puberty, typically ages 11-16 years old
What is the general shape of the vertebral body at each region of the spine?
cervical - rectangular; thoracic - triangular; lumbar - reniform
What is the name given to the compact bone at the superior and inferior surfaces of the vertebral body?
superior epiphyseal rim, inferior epiphyseal rim
What is the name given to the cartilage found at the superior and inferior surface of a developing vertebral body?
superior epiphyseal plate, inferior epiphyseal plate
What large opening is usually observed at the back of the vertebral body?
the basivertebral venous foramen
What is the name given to the intermediate part of the vertebral arch where the transverse process and articular processes attach?
the lamina-pedicle junction
What is the generic orientation of the pedicle at each region of the spine?
Cervical - posterolateral
Thoracic - posterior, slightly lateral
Lumbar - posterior