exam 2 lumbars Flashcards
What accounts for direction of lumbar curve?
Vertebral body and IVD have greater ant. height than post. height
Effect of aging on vertebral body of lumbars
Decrease in height, increase in circumference
Number of joint surfaces present on typical lumbar vertebral body?
6
Muscles attaching to typical lumbar vertebral body
Psoas major and minor
Psoas minor only attaches to vertebral bodies of which segments?
T12 and L1
Name given to ligaments attaching vertebral body to articular process
Transforaminal ligs.
Hofmann ligaments are in which regions of vertebral column?
Cervical– upper thoracic region and lumbar region
Cervical-upper thoracic hofmann ligaments attach what 2 structured together?
Dura mater to segments above
Highest level demonstrating hofmann ligaments?
C6
Proposed function of cervial-upper thoracic Hofmann ligaments?
Resist caudal movement of dural sac; resist gravitational forces on dura and cord
Lumbars hofmann ligament attach what structures together?
Dura mater to lower segmental levels
Proposed function of lumbar hofmann ligaments
Resist cranial movement of dural sac during flexion
What osseous conditions of lumbar vertebra facilitate a spinal tap in this region?
Overlap of laminae, shingling, diminishes; overlap of spinous process, imbrication, diminishes
Generic direction and relative length of each succeeding lumbar transverse process?
Each transverse process directed straight lat. and increases in length from L1-L3, L4 begins to decrease in length
Name of elevation near origin of lumbar transverse process?
Accessory process
Congenital elongationof lumbar ccessory process results in what feature? with a frequecy of?
Styloid process; occurance of 7%
Ligament that will attach to lumbar accasory process
Mammillo-accessory lig.
What is entrapped by mammillo-accesory ligment?
Medial branch of dorsal ramus of lumbar spinal nerve
Muscles attaching to lumbar accessor process?
Longissimus thoracic and intertransversarii
Ligament attaching 12th rib to transverse process of L1?
Lumbocostal lig.
Muscles that may attach to transverse process of typical lumbar vertebra?
Psoas major, quadratus lumborum, longissimus thoracic, rotator brevis and longus, and intertransversarii
Ligaments attaching to transverse process of typical lumbar vertebra
Lumbocostal, mammillo-accessory and intertransverse ligs,
