Unit 3 Vertebral Column/Spinal Column Flashcards
What is the difference in vertebrae between a typical adult and a typical adolescent?
Adult: 26 Segments
Adolescent: 33 segments
Answer: 7 segments
How many segments unite to form the typical sacrum?
5 segments
How many segments unite to form the typical coccyx?
4 segments
Define the term “cervical”.
the region of the neck.
What does the term “thoracic” refer to?
Breast plate or chest
Referred to the armor bearing region of the torso.
Besides the term “thoracic” what is another term used to identify vertebral segments of the chest?
Dorsal segments or Dorsals
What does the term “lumbar” refer to?
Loin; region between the rib and hip.
Sacrum is a term used to refer to what?
Holy bone or Holy Region
What does the term coccyx refer to?
Cuckoo birds’ bill or beak
What is the most stable vertebral segmental region of the spine?
Cervical region
What are the typical measurements of a male and females spinal column. Give Inches and Centimeters.
Male: 70cm 28.75 Inches
Female: 60cm 25.75 Inches
What is the difference in length between a typical male and typical female spinal column?
3 inches.
Give the measurements of each individual cervical, thoracic, lumbar, and sacral regions in cm and inches.
Cervical: 12cm, 5”
Thoracic: 28cm, 11”
Lumbar: 18cm, 7”
Sacral: 12cm, 5”
How does the vertebral column specifically accommodate weight-bearing transfer?
S1–S3 at the auricular surface
How does the vertebral column participate in skeletal formation?
Ribs are formed from the Costal Process of the Embryonic Vertebral Template.
Distinguish between motion and locomotion.
Motion: movement w/o travel
Locomotion: Movement w/ travel.
What organ(s) is (are) specifically associated with the horizontal axis of the skull?
Eyes
Vestibular apparatus of inner ear
How is the vertebral column involved in stabilization of visceral function?
Integrity of the spinal column. This enhances the appropriate nerve system control of viscera.
When does the embryonic disc form?
Second week in Utero.
When does gastrulation occur or a 3-layered embryo form?
Third week in Utero.
What are the 3 layers of the embryo called?
Ectoderm
Mesoderm
Endoderm
Invagination of ectoderm along the primitive streak gives rise to what embryonic structure?
Notochord
What is the name given to the mesoderm that will give rise to the vertebral column?
Paraxial mesoderm
What does paraxial mesoderm give rise to that will form the vertebral column?
Somites
Name the areas of cellular differentiation formed within the somite.
Sclerotome
Myotome,
Dermatome
What part of the somite will give rise to the vertebral column?
Sclerotome
List, in order, the names of the successive vertebral columns formed during development.
Membranous
Cartilaginous
Skeletal or Osseous
Migration of sclerotomes to surround the notochord forms what developmental feature?
Perichordal Blastema
The perichordal blastema gives rise to what processes?
Neural processes
Costal processes
What is the name of the artery located between adjacent perichordal blastemae?
Intersegmental Artery
Cell proliferation within the perichordal blastema will result in what features?
Loss Cranial sclerotomite
Dense Caudal sclerotomite
What forms between the sclerotomites of a perichordal blastema?
Intrasclerotomal fissure
The intrasclerotomal fissure (fissure of von Ebner) gives rise to what developmental feature?
Perichordal disc
The perichordal disc in the presumptive location of what adult feature?
Intervertebral Disc
What is the earliest embryonic feature that will identify the position of the adult intervertebral disc?
Intrasclerotomal Fissure ( Fissure of Von Ebner)
The union of a dense caudal sclerotomite and a loose cranial sclerotomite from adjacent perichordal blastemae gives rise to what feature?
Vertebral Blastema
What vessel will be identified adjacent to the vertebral blastema?
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?
Chondrification
Chondrification is first identified in which region of the embryonic vertebral column?
Cervical Region
What are the names given to the centers of Chondrification within the vertebral blastema?
Centrum Center
Neural arch center
Transvers Process center
How many centers of Chondrification typically appear in the vertebral blastema?
6 total
2—for the Centrum
2—for the Neural arch
2—for each Transverse process
What is the earliest time that centers of ossification appear in the cartilaginous vertebra?
7th embryonic week
Ossification begins in which region of the embryonic vertebral column?
Lower cervical
Upper thoracic
What is the ratio of primary to secondary centers of ossification for a typical vertebra?
3 primary
5 secondary
What are the names of the primary centers of ossification for a typical vertebra?
Centrum centers
Neural Arch centers
How many primary centers of ossification appear in the typical vertebra?
3 total
1—- Centrum
2— Neural arches
What is the classification of the joint forming between primary centers of ossification in the typical vertebra?
Neurocentral Synchondrosis
Neural Arch Synchondrosis
What are the names of the five secondary centers of ossification for a typical vertebra?
Tip of Transverse Process
Tip of the Spinous Process
Epiphyseal Plate Centers
How many secondary centers of ossification appear in the typical vertebra?
5 total
1–per Tip of Transverse Process (2)
1–Tip of the Spinous Process
1– for each Epiphyseal Plate Centers (2)
What are the names of the synchondrosis forming between secondary centers of ossification and the rest of the typical vertebra?
Tip of Transverse Process Synchondrosis
Tip of the Spinous Process Synchondrosis
Epiphyseal Plate Centers 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 three basic osseous parts of vertebra?
Vertebral body
Vertebral arch
Apophyseal regions
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 are the names of the opening found around the margins of the vertebral body?
Nutrient Foramina or Vascular Foramina
What large opening is usually observed at the back of the vertebral body?
Basivertebral Venous Foramen
What is the name given to the anterior part of the vertebral arch?
Pedicle
What is the name given to the posterior part of the vertebral arch?
Lamina
What is the name given to the intermediate part of the vertebral arch where the transverse process and articular processes attach?
Lamina-Pedicle Junction
What is the name of the feature located at the upper and lower surfaces of the pedicle?
Superior Vertebral Notch or Incisure
Inferior Vertebral Notch or Incisure
What is the generic orientation of the pedicle at each region of the spine?
Cervical— Posterolateral
Thoracic— Posterior, slight lateral
Lumbar—- Posterior
All lamina are oriented in what direction?
Posterior and Median
What is the name given to the overlap of laminae seen on X-ray?
Shingling
What ligament will attach to the lamina?
Ligamentum Flavum
What is the name given to abnormal bone at the attachment site of the ligamentum flavum?
Para-articular Process
What classification of bone will para-articular processes represent?
Accessory bone
What is the name given to the lamina-pedicle junction at each region of the spine?
Cervical– Articular Pillar
Thoracic and Lumbar— Pars Interarticularis
What is the name given to the tubular bone growth regions of the vertebral arch?
Apophyseal regions
What names may be given to each apophysis of the spine?
Transverse apophysis or Process
Articular apophysis or Process
Spinous apophysis or Process
What is the generic orientation of the transverse process or transverse apophysis at each region of the spine?
Cervical— Anterolateral
Thoracic— Posterolateral
Lumbar— Lateral
All non-rib bearing vertebra of the spine retain what equivalent feature?
Costal Element
What is the name given to the rounded elevation at the end of the transverse apophysis or process?
Transverse tubercle
What will cause the transverse process/apophysis to alter its initial direction in the cervical region?
Cervical spinal nerves are pulled forward and downward to form the cervical and brachial nerve plexuses. Thus remodeling the transverse process to accommodate their new position.
What will cause the transverse process/apophysis to alter it initial direction in the thoracic region?
The growth of the lungs remodel the shape of the ribs which in turn push the transverse processes backward.