Membranous Vertebral Column - Vertebral Foramen Flashcards
The perichordal disc in the presumptive location of what adult feature?
The intervertebral disc
What is the earliest embryonic feature that will identify the position of the adult intervertebral disc?
The intrasclerotomal fissure of Von Ebner
The union of a dense caudal sclerotomite and a loose cranial sclerotomite from adjacent perichordal blasfema gives rise to what feature?
The vertebral blastema
What vessel will be identifies adjacent to het vertebral blastema?
The Segmental artery
When will cartilage first from in the membranous vertebral blastema?
Beginning in the 6th embryonic week
What is the name given to the replacement of mesoderm by cartilage?
Chondrification
Chondrification is first identified in which region of the embryonic vertebral column?
The cervical region
What are the names given to the centers of chondrification within the vertebral blastema?
Centrum center, neural arch center, transverse process center
What is the earliest time that centers of ossification appear in the cartilaginous vertebra?
During the 7th embryonic week
Ossification begins in which region of the embryonic vertebral column?
The lower cervical-upper thoracic region
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 vertebra?
3 primary centers: 5 secondary centers
What are the names of the primary centers of ossification for a tympanic vertebra?
Centrum centers and neural arch centers
How many primary centers of ossification appear in the typical vertebra?
Three… 1 for the centrum, 2 for the neural arches
What is the classification of the joint forming between primary centers of ossification?
Cartilage synchondrosis/ amphiarthrosis synchondrosis
What are the names of the synchondroses forming between primary centers of ossification in the typical vertebra?
Neurocentral synchondrosis and neural arch synchondrosis
What are the nemas of the 5 secondary centers of ossification for a typical vertebra?
Tip of the transverse process, tip of the spinous process, epiphyseal plate centers
How many secondary centers of ossication appear in the typical vertebra?
5… 1 for the tip of each transverse process, 1 for the tip of the spinous process, 1 for each epiphyseal plate
What are the names of the synchondroses forming between secondary centers of ossification and the rest of the typical vertebra?
Tip of the transverse process synchondrosis, tip of the spinous process synchondrosis, and epiphyseal ring synchondrosis
What is the range of appearance for secondary centers of ossification of a typical vertebra?
During puberty, typically ages 11-16 years old
What are the 3 basic Ossetia parts of a vertebra?
The vertebral body, vertebral arch, and the apophyseal regions