Flashcards in lumbar region ex 2 QQ Deck (45)
what parts of the vertebra may be used to distinguish L1-L4 from L5?
what is the generic shape of the typical lumbar vertebral body from the cranial view?
reniform or kidney shaped
what accounts for the direction of the lumbar curve?
vertebral body and intervertebral disc have a greater anterior height than posterior height
what is the effect of aging on the vertebral body of a lumbar vertebra?
decrease in height, increase in circumference
what muscles may attach to a typical lumbar vertebral body?
psoas major and minor
psoas minor will only attach to the vertebral body of which segments?
what is the name given to the ligaments that attach the vertebral body to the articular process?
what ligaments attach the vertebral body to the transverse process?
what names identify ligaments that attach the dura mater to the vertebral body or pedicle?
anterior, posterior and lateral Hofmann ligaments
proximal sleeve ligaments
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?
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 segmental levels
what is the proposed function of the lumbar Hofmann ligaments?
resist cranial movement of the dural sac during flexion
what is the proposed function of the proximal root sleeve ligaments?
resist displacement of the peripheral nerve system in the intervertebral foramen
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 outline of the vertebral foramen of a typical lumbar vertebra?
how does the size of the vertebral foramen differ along the spine?
cervicals have the greatest size, lumbars next, thoracics smallest
what part of the central nerve system is present in the lumbar spine?
conus medullaris is typically present in the vertebral foramen of L1
what is the name of the elevation near the origin of the lumbar transverse process?
a styloid process occurs with what frequency and as a result of what condition?
7% occurrence as a result of congenital elongation of the lumbar accessory process
what parts of a vertebra are attached via the mammillo-accessory ligament?
mammillary process and accessory process of the same segment
what was believed to be entrapped by the mammillo-accessory ligament?
medial branch of the dorsal ramus of a lumbar spinal nerve
what muscles attach to the lumbar accessory process?
what muscles may attach to the transverse process of a typical lumbar?
what are the posterior elements of the vertebra?
what are the anterior elements of the vertebra?
what is the orientation of the typical lumbar superior articular facet?
backward upward medial, typically concave