Lumbar spine Flashcards
typical lumbar vertebrae
L1-L4
w MAMILLARY PROCESS
atypical lumbar vertebrae
L5
TRANSITIONAL
ligaments in order from anterior to posterior
ALL
PLL
lig flavum
interspinal
supraspinous
where in the lumbar spine does the spinal cord end
L1-L2 then becomes cauda equina “horses tail”
2 joints in lumbar spine
facet - between vertebral arches
intervertebral - between vertebral bodies
what ligaments are unique to the lumbar spine
iliolumbar ligaments
protect the lumbosacral joint
lumbar spine extension is coupled w what
sacral nutation
anterior sacral tilt
lumbar flexion is coupled w what
sacral counternutation
posterior sacral tilt
C2-C5 coupled movements
IPSILATERAL
T6-T5 coupled movements
CONTRALATERAL
what are the abdominal muscles
internal obliques
external obliques
transverse abdominis
rectus abdominis
O’s and I’s external obliques
external surface rib 5-12
linea alba, pubic tubercles
anterior 1/2 iliac crest
actions of internal and external obliques
flexion and lateral flexion
O’s and I’s internal obliques
ant and mid 1/3 iliac crest, lat 2/3 inguinal ligament
borders ribs 10-12, linea alba
O’s and I’s transverse abdominis
costal cartilages 7-12
thoracolumbar fascia
iliac crest
inguinal ligament
linea alba, pubic crest
O’s and I’s rectus abdominis
pubic crest, pubic symphysis
costal cartilage ribs 5-7, xiphoid process
O’s and I’s pyramidalis
pubic crest
linea alba
what 2 muscles form the iliopsoas
psoas major
iliacus
O and I iliacus
superior 2/3 iliac fossa, internal lip iliac crest, ala, iliolumbar/sacroiliac ligaments
distal to lesser trochanter
what innervates the iliacus
femoral nerve
what innervates the psoas major/minor
lumbar plexus
as a group what do the abdominal muscles do
compress and stabilize abdomen
what rotation does the internal oblique perform
ipsilateral rotation of the trunk
what rotation does the external obliques do
contralateral rotation
what actions does the rectus abdominis do
trunk flexion
posterior pelvic tilt
compress and stabilize abdomen
what innervates the oblique muscles
intercostal nerve ventral rami
what is the linea alba
fibrous white line made of CT that runs down the midline of the abdomen
from xiphoid process to pubic symphysis
what structure lives in the linea alba
the umbilicus
what is a prime mover for hip flexion
iliopsoas
- tested as a group
can cause hyperlordosis
O and I rotatores lumborum
TP’s of L1-L5
base of SP and lamina 1-2 segments above origin
O and I multifidus lumborum
TP(mamillary process) L1-L5
SP’s 3-4 segments above
O and I semispinalis thoracis
TP T6-T12
SP C6-T4
spinalis thoracis
SP’s T11-L2
SP T1-T8
what does the iliolumbar ligament span from
L5 to ilium
