Structural Analysis Flashcards
7 cards from real CBP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Structural Analysis flashcards as text
In the Harrison posterior tangent method, which anatomical landmark is used to draw each vertebral line on a lateral cervical radiograph?
Answer: The posterior vertebral body margin
The Harrison posterior tangent method draws lines along the posterior vertebral body margins, which are less distorted by endplate irregularities than Cobb lines.
What is the approximate ideal absolute rotation angle (ARA) from C2 to C7 in the Harrison cervical model?
Answer: -42 degrees
The Harrison ideal cervical lordosis is a circular arc with a C2-C7 ARA of about -42 degrees.
Which geometric shape best describes the Harrison ideal cervical lordosis model?
Answer: A circular arc
Harrison modeled the ideal cervical lordosis as part of a circle, tangent to the posterior vertebral bodies.
Why does CBP structural analysis require standing, weight-bearing radiographs?
Answer: They show the spine under normal gravitational loading and posture
Weight-bearing films capture the patient's true sagittal and coronal alignment under gravity.
On a lateral cervical film, a C2-C7 ARA of -12 degrees would be classified as:
Answer: Hypolordosis
A lordosis that is well below the -42 degree ideal but still lordotic is hypolordotic.
In the CBP Cartesian coordinate system, anterior head translation is described as translation along which axis?
Answer: Z-axis
CBP uses the z-axis for anterior-posterior translation, so anterior head translation is +Tz.
In a cervical study by McAviney et al., a lordosis of less than how many degrees was associated with neck pain?
Answer: 20 degrees
McAviney et al. (2005) reported that a cervical lordosis under 20 degrees was associated with cervical pain.