Flashcards in Exam 3 Deck (189)
What is the name given to the joint formed between the tip of the dens and the odontoid center of ossification?
Tip of the dens synchondrosis
At what age will the tip of the dens center of ossification appear?
Sometime in early adolescence
If the joint formed between the tip of the dens and odontoid proces centers of ossification persists beyond age 12, what is the condition called?
What is the incidence of rib related changes following dorsalization of c7?
From one-half to two and one-half percent of the population
What alteration in C6 facet orientation may accompany dorsalization?
C6 demonstrates a change in inferior articular facet orientation from forward lateral and downward to forward medial and downward. Superior facet unchanged
What percent of the population may demonstrait thoracic like features at C7?
Up to 46%
What T1 facet orientation changes may accompany cervicalization?
The superior articular facet may change from BUL to BUM inferior unchanged
What is the incidence of cervicalization of T1 in the population?
Up to 28% of population
What rib-related changes may accompany lmbarization of T12?
A significant shortening of the mean relative length of 113 mm of the twelfth rib or it becomes absent
What T12 facet orientation changes may accompany lumbarization?
The superior araticular facet may change from flat, back, upward, and lateral to concave, back, upward, and medial. Inferior facet unchanged
What is characteristic of lumbarization of S1?
The failure of synostosis between S1 and S2, squaring of the vertebral body of S1 and flaring of the sacral ala
What is characteristic of sacralization of L5?
L5 may be partially or completely fused to the sacrum
Which segment demonstrates the greatest morphological variation along the spine?
What is the incidence of variation within the sacrococcygeal region in the population?
Up to 14 percent
What developmental events are indicated in the formation of the adult cervical spine?
Centers for vision and equilibrium will appear in the brain musculature attaching the skull, cervical region, and upper thorax together develops the head is held upright and the intervertebral disc height becomes greater anterior than posterior
At what age will the infant begin to hold the head erect?
Usually between the third and fourth month after birth.
What is the location for the cervical kyphosis?
Between occiput and C1
What is the name given to the primary cervical curve?
What is the name What is the vertebral relationship between the cervical curve and the cervical enlargement?
Cervical curve CT1; cervical enlargment C3-T1
What infant activities are associated with the developmental of the lumbar curve?>
Crawling and walking
What developmental events are indicated in the formation of the adult lumbar curve?
crawling will cause abdomen to put tension on lumbar region and pulls it forward
Muscle development is promoted to compensate for the swayback of the lumbars
Intervertebral disc height will become greater anterior compared to posterior
walking will further promote muscle and IVD development
What is the time of appearance of the lateral curves?
They appear after 6 years old
What is the relationship between cure direction and handedness?
Right handed person has a high probability for right thoracic, left lumbar combo
What clinical examples of abnormal curvatures aloneg the vertebral column were stressed in class?
Military neck, humpback or hunchback, or swayback
What is military neck?>
Decreased anterior curve in the cervical region, a straight neck
What is a swayback?
An increased anterior curve in the lumbar region
What are the curve classifications for military neck?
A kyphosis or hypolordotic curve
What are the curve classifications for humpback or hunchback?
A kyphosis or hyperkyphotic curve
What are the curve classifications for swayback?
A lordosis or hyperlordotic curve