Ch4 Test 4 Flashcards
Ossification
•The term for bone formation by osteoblast cell
Osteoclasts
•reabsorbs bone removes bone from diaphysis
Resorption
•The term for bone destruction by osteoclasts
At what age does bone loss exceed bone gain
•40 years old
Osteoblasts
•produces new bone
Transitional vertebra
- A vertebra that has characteristics of two different types of vertebra
- congenital diseases
Transitional vertebra; location, radiographic appearance
- lumbarsacral junction
* expanded transverse process
Posterior defect of the spinal canal
•spina bifida
Splitting of the bony neural canal at L5 or S1
•spina bifida occulta (hidden)
Spinal bifida; radiographic appearance
- increase interpedicular distance
- boney defects
- absence of the laminae
- MRI presence of spinal cord/nerve roots with in herniated sac
Spinal bifida; treatment
•folic acid supplements during pregnancy
Epiphyseal cartilage
- between the epiphysis & diaphysis
- growth plate found on long bones
- mostly on children & adolescents
Meningocele
- type of spina bifida
* herniation of the meninges
______ also known as marble bones “chalk”
•osteopetrosis
Myelomeningocele
- herniation of
* meninges or nerve roots
results from diminished proliferation of the growth plate
•achondroplasia (common in dwarfs)
Where the diaphysis meets the epiphyseal growth plate
•metaphysis
Osteogenesis imperfecta treatment
- cast/brace
* rods for long bones
Spina bifida location
•entire vertebrae
Continuously resorbs old bone & produces new bone until adults
- osteoblasts
* osteoclasts
This disease often lead to pt with unusual blue color of the sclera of the eye
•osteogenesis imperfecta
Osteopetrosis location
•entire skeleton
Chiari II Malformation is associated with
•myelomeningocele
Osteopetrosis
- hereditary disease
- prevents bone marrow to form
- bone becomes very brittle
Brittle bones often characterized by multiple fractures
Osteogenesis imperfecta
Osteopetrosis; radiographic appearance/technique
- increase in bone density
* increase technique
Osteopetrosis; treatment
•no treatment
Most common infectious arthritis
•migratory arthritis from Lyme disease
Under the microscope the matrix of the bone consists of complex structure called
•haversian system
Osteopetrosis congenital or hereditary
•hereditary
Stress factor often occur for this disease/ PT. often becomes anemic
•osteopetrosis
Osteogenesis imperfecta location
•long bones