Chapter 9: Lumbar Spine, Sacrum and
Coccyx
The intervertebral foramina of the lumbar spine are located at an angle of _____
in relation to the midsagittal plane. - CORRECT ANSWER-90
The small section of bone found between the superior and inferior articular
processes of the lumbar spine is termed: - CORRECT ANSWER-pars
interarticularis
The zygapophyseal joints of the upper lumbar vertebrae are ____ in relationship
to the midsagittal plane. - CORRECT ANSWER-50
The anterior projecting bony process of the sacrum that forms part of the inlet of
the true pelvis is the: - CORRECT ANSWER-promontory of the sacrum.
Another term for the sacral horns is the: - CORRECT ANSWER-cornu of the
sacrum
Which specific aspect of the sacrum articulates with the ilium to form the
sacroiliac joint? - CORRECT ANSWER-Auricular surface
Which one of the following structures of the sacrum is considered to be the most
posterior?
a. Median sacral crest
b. Promontory
c. Superior articular processes
d. Spinous processes - CORRECT ANSWER-a. Median sacral crest
What is the term for the superior aspect of the coccyx? - CORRECT
ANSWER-base
T/F: The long axis of the sacrum is generally angled more posteriorly in males
than females. - CORRECT ANSWER-false
, What is the joint classification of the zygapophyseal joints? - CORRECT
ANSWER-Synovial/diarthrodial
The intervertebral joints in the lumbar spine are classified as: - CORRECT
ANSWER-cartilaginous/amphiarthrodial.
What type of joint movement occurs with the zygapophyseal joints? - CORRECT
ANSWER-plane
Which of the following topographic landmarks corresponds with the L4-5
vertebral level?
a. Xiphoid process
b. Lower costal margin
c. Anterior superior iliac spine (ASIS)
d. Iliac crest - CORRECT ANSWER-d. Iliac crest
Which of the following structures is located at the level of the ASIS?
a. S1-2
b. Tip of coccyx
c. Promontory of sacrum
d. L4-5 - CORRECT ANSWER-a. S1-2
T/F: A female is more likely to suffer a fracture of the coccyx due to a backward,
sitting type of fall than a male. - CORRECT ANSWER-true
T/F: The Scottie dog sign is demonstrated with oblique projections of the thoracic
and lumbar spine. - CORRECT ANSWER-false
T/F: The anterior oblique (RAO and LAO) positions of the lumbar spine will
demonstrate the zygapophyseal joints closest to the image receptor - CORRECT
ANSWER-false
The average degree of rotation required to demonstrate the L3-4 zygapophyseal
joints is: - CORRECT ANSWER-45
Why should the hips and knees be flexed for an anteroposterior (AP) projection
of the lumbar spine?
Coccyx
The intervertebral foramina of the lumbar spine are located at an angle of _____
in relation to the midsagittal plane. - CORRECT ANSWER-90
The small section of bone found between the superior and inferior articular
processes of the lumbar spine is termed: - CORRECT ANSWER-pars
interarticularis
The zygapophyseal joints of the upper lumbar vertebrae are ____ in relationship
to the midsagittal plane. - CORRECT ANSWER-50
The anterior projecting bony process of the sacrum that forms part of the inlet of
the true pelvis is the: - CORRECT ANSWER-promontory of the sacrum.
Another term for the sacral horns is the: - CORRECT ANSWER-cornu of the
sacrum
Which specific aspect of the sacrum articulates with the ilium to form the
sacroiliac joint? - CORRECT ANSWER-Auricular surface
Which one of the following structures of the sacrum is considered to be the most
posterior?
a. Median sacral crest
b. Promontory
c. Superior articular processes
d. Spinous processes - CORRECT ANSWER-a. Median sacral crest
What is the term for the superior aspect of the coccyx? - CORRECT
ANSWER-base
T/F: The long axis of the sacrum is generally angled more posteriorly in males
than females. - CORRECT ANSWER-false
, What is the joint classification of the zygapophyseal joints? - CORRECT
ANSWER-Synovial/diarthrodial
The intervertebral joints in the lumbar spine are classified as: - CORRECT
ANSWER-cartilaginous/amphiarthrodial.
What type of joint movement occurs with the zygapophyseal joints? - CORRECT
ANSWER-plane
Which of the following topographic landmarks corresponds with the L4-5
vertebral level?
a. Xiphoid process
b. Lower costal margin
c. Anterior superior iliac spine (ASIS)
d. Iliac crest - CORRECT ANSWER-d. Iliac crest
Which of the following structures is located at the level of the ASIS?
a. S1-2
b. Tip of coccyx
c. Promontory of sacrum
d. L4-5 - CORRECT ANSWER-a. S1-2
T/F: A female is more likely to suffer a fracture of the coccyx due to a backward,
sitting type of fall than a male. - CORRECT ANSWER-true
T/F: The Scottie dog sign is demonstrated with oblique projections of the thoracic
and lumbar spine. - CORRECT ANSWER-false
T/F: The anterior oblique (RAO and LAO) positions of the lumbar spine will
demonstrate the zygapophyseal joints closest to the image receptor - CORRECT
ANSWER-false
The average degree of rotation required to demonstrate the L3-4 zygapophyseal
joints is: - CORRECT ANSWER-45
Why should the hips and knees be flexed for an anteroposterior (AP) projection
of the lumbar spine?
