Day 9 Flashcards
What characteristic(s) of the L1-L4 vertebral body may be used to differentiate it from the L5 segment? Be specific and complete as the difference(s) on a segment from each group.
On cranial view, the lateral surface of the pedicle is apparent on a L1-L4 segment.
At L5 the transverse process originates from the vertebral body, pedicle and lamina-pedicle region.
In addition, the vertebral body of L5 is more wedge-shaped on lateral view with a much greater anterior height than posterior height
What accounts for the direction of the lumbar curve?
the vertebral body and intervertebral disc have a greater anterior height than a posterior height
What is the effect of aging on the vertebral body of a lumbar vertebra?
decrease in height, increase in circumference
How many joint surfaces are present on the vertebral body of a typical lumbar?
six
What joint classification will be observed at the vertebral body of a typical lumbar?
cartilaginous (amphiarthrosis) symphysis joint and fibrous (amphiarthrosis) syndesmosis joint
What muscles may attach to a typical lumbar vertebral body?
psoas major and psoas minor
What is the name given to ligaments which attach the vertebral body to articular process?
transforaminal ligaments
What are the attachment sites of the superior transforamninal ligament at the L1-L2 intervertebral foramen?
L1 vertebral body and the inferior articular process of L1
What are the attachment sites of the middle transforaminal ligament at the L1-L2 IVF?
intervertebral disc and the inferior articular process of L1
What are the attachment sites of the of the inferior transforaminal ligament at the L1-L2 IVF?
L2 vertebral body and the superior articular process of L2
What are the attachment sites of the superior corporotransverse ligaments at the L1-L2 IVF?
L1 vertebral body and L1-L2 intervertebral disc to the transverse process of L2
What are the attachment sites of the inferior corporotransverse ligaments at the L1-L2 IVF?
L2 vertebral body and L2-L3 intervertebral disc to the transverse process of L2
**Hofmann ligaments are identified in which regions along the vertebral column?
cervical- upper thoracic region and lumbar region
**Cervical- upper thoracic Hofmann ligaments will attach what structures together?
dura mater to segments above
**What is the highest level known to demonstrate Hofmann ligaments?
C6
**What is the proposed function of the cervical- upper thoracic Hofmann ligaments?
resist caudal movement of the dural sac; resist gravitational forces on the dura and cord
**Lumbar Hofmann ligaments will attach what structures together?
dura mater to lower segments
** What is the proposed function of the lumbar Hofmann ligaments?
resist cranial movement of the dural sac during flexion
**What osseous conditions of lumbar vertebrae facilitate a spinal tap in this region?
overlap of the laminae, shingling, diminishes;
overlap of spinous processes, imbrication, diminishes
**What is the name of the elevation near the origin of the lumbar transverse process?
accessory process
**Congenital elongation of the lumbar accessory process results in what feature?
styloid process
**Congenital elongation of the lumbar accessory process occurs with what frequency?
7% occurrence
What ligament(s) will attach to the lumbar accessory process?
mammillo-accessory ligament
What was believed to be entrapped by the mammillo-accessory ligament?
the medial branch of the dorsal ramus of a lumbar spinal nerve
What muscle(s) attach to the lumbar accessory process?
longissimus thoracis and intertransversarii
What ligament attaches the twelfth rib to the transverse process of L1?
the lumbocostal ligament
**What muscles may attach to the transverse process of a typical lumbar vertebra?
psoas major, quadratus lumborum, longissimus thoracis, rotator brevis, rotator longus and intertransversarii
