Basic Embryology Of The Vertebral Column Flashcards Preview

Spinal > Basic Embryology Of The Vertebral Column > Flashcards

Flashcards in Basic Embryology Of The Vertebral Column Deck (35):
1

What are the 3 layers of the embryo called?

Ectoderm, mesoderm, endoderm

2

Invagination of ectoderm along the primitive speak gives rise to what embryonic structure?

Notochord

3

What is the name given to the mesoderm that will give rise to the vertebral column?

Par axial mesoderm

4

What does par axial mesoderm give rise to that will form the vertebral column?

Somites

5

Name the areas of cellular differentiation formed within the somite.

Sclerotome, myotonic and dermatome

6

What part of the somite will give rise to the vertebral column?

Sclerotoma

7

List in order, the names of the successive vertebral columns formed during development.

Membranous, cartilaginous, skeletal or osseous

8

Migration of sclerotomes to surround the notochord forms what developmental feature?

The perichordal blastema

9

The perichordal blastem gives rise to what processes?

Neural processes and costal processes

10

What is the name of the artery located between adjacent perichordal blastemae?

Inter segmental artery

11

Cell proliferation within the perichordal. Blastema will result in what features?

A loose cranial sclerotomite and a dense caudal sclerotomite

12

What forms between the sclerotomite said of a perichordal blastema?

The intrasclerotomal fissure (fissure of Von Ebner)

13

The intrasclerotomal fissure gives rise to what developmental feature?

The perichordal disc

14

The perichordal disc in the presumptive location of what adult feature?

The intervertebral disc

15

What is the earliest embryonic feature what will Id the position of the adult interertrebral disc?

The intrasclerotomal fissure

16

The Union of a dense caudal sclerotomite and a loos cranial sclerotomite from adjacent perichordal blastemae give rise to what feature?

The vertebral blastema

17

What vessel will be IDed adjacent to the vertebral blastema?

The segmental artery

18

What is the name given to the replacement of mesoderm by cartilage?

Chondrification

19

Chondrification begins in which region of the embryonic vertebral column?

The cervical region

20

What are the names given to the centers of Chondrification within the vertebral blastema?

Centrum center, neural arch center, transverse process center

21

How many centers of Chondrification typically appear in the vertebral blastema?

Six... 2 for the centrum, 2 for the neural arch, 2 for each transverse process

22

What is the earliest time that centers of ossification appear in the cartilaginous vertebra?

During the 7th embryonic week

23

Ossification begins in which region of the embryonic vertebral column?

The lower vertical-upper thoracics region

24

What is the ratio of primary to secondary venters of ossification for a typical vertebra?

3 primary centers: 5 secondary centers

25

What are the names of the primary centers of ossification for a typical enteral?

Centrum centers and neural arch centers

26

How many primary centers of ossification appear in the typical vertebra?

There.. 1 for the centrum, 2 for the neural arches

27

What is the classification of the joint forming between primary centers of ossification?

Cartilage synchro dross/amhiarthrosis synchondrosis

28

What are the names of the synchondrosis forming between primary centers of ossification?

Neurocentral synchondrosis and neural arch synchondrosis

29

What are the names off the five secondary centers of ossification for a typical vertebra ?

Tip of the transverse process, tip of the spinous process, epiphyseal plate centers

30

How many secondary centers of ossification appear in the typical vertebra?

Five... 1 for the tip of each transverse process, 1 for the it of the spinous process, 1 for each epiphyseal plate

31

What is the classification of the joint forming between secondary centers of ossification and the rest of the typical vertebra?

Cartilage synchondrosis/amphiarthrosis synchondrosis

32

What are the names of the synchondroses forming between secondary centers of ossification and the rest off the typical vertebra?

Tip of the transverse process synchondrosis, tip of the spinous process synchondrosis, and epiphyseal ring synchondrosis

33

What is the range of appearance for secondary centers of ossification of a typical vertebra?

During puberty, typically ages 11-16 years old

34

What is the name given to enters of ossification based on time of appearance?

Primary centers appear in utero, secondary centers appear after birth

35

When will cartilage first form in the membranous vertebral blastema?

Beginning in the 6th embryonic week