Post Abdomen Flashcards
Structures involved in the pelvic girdle
- Sacrum
- 2 hip bones
- Sacroiliac joint
- Acetabulum
- Pubic symphysis
Structures that make up hip bone, and relative location
- Ilium (more superior)
- Ischium (posterior)
- Pubis (anterior, inferior)
bones that create the acetabulum
- Ilium
- Ischium
- Pubis
Structures on the lateral side of the hip bones (top to bottom)
- Iliac crest
- Anterior superior iliac spine (ASIS)
- Anterior inferior iliac spine (AIIS)
- Obturator foramen
Structures on the medial side of the hip bones (Top to bottom)
- Posterior superior iliac spine (PSIS)
- Posterior inferior iliac spine (PIIS)
- Greater sciatic notch
- Ischial spine
- Lesser sciatic notch
- ischial tuberosity
At what level is the iliac crest
L4
name of the inner part of the ileum
iliac fossa
Landmarks/point of attachments on femur
- greater trochanter
- lesser trochanter
Role of the sciatic foramina
routes to gluteal and posterior thigh
ligaments in the sciatic foramina, general location and attachment
- Sacrotuberous ligament (ischial tuberosity to sacrum)
- Sacrospinous ligament (ischial spine to sacrum)
- SS is deep to ST
posterior abdominal wall muscles
- psoas major and iliacus (iliopsoas)
- quadratus lumborum
proximal attachments of psoas major and iliacus
psoas major –> Lumbar vertebrae (lateral aspect of bodies and discs, anterior aspect of transverse processes)
Iliacus –> iliac fossa
Distal attachments of psoas major and iliacus
lesser trochanter of femur
action of iliopsoas
- flexes thigh at hip
- flexes vertebral column
- stabilize hip joint
Innervation of iliopsoas
psoas major –> L2-L4 anterior rami
Iliacus –> femoral nerve
Proximal attachments of quadratus lumborum
- 12th rib
- lumbar vertebrate (tips of transverse processes)
Distal attachments of quadratus lumborum
iliac crest
action of quadratus lumborum
- extends vertebral column
- laterally flexes vertebral column
- fixes 12th rib (in place) during inspiration
innervation of quadratus lumborum
- anterior rami (T12-L4)
nerves in the lumbosacral plexus
lumbar plexus –> anterior rami of spinal nerves (L1-L4)
sacral plexus –> anterior rami of spinal nerves (L4-L5 and S1-S4), sciatic nerve
Muscles involved in the lumbosacral plexus
lumbar plexus –> muscles in the anterior and medial thigh
Sacral plexus –> muscles in gluteal region, sciatic nerve (posterior thigh, leg, foot)
name the nerves involved in the lumbar plexus (+ vertebral levels if possible)
- iliohypogastric nerve (L1)
- ilioinguinal nerve (L1)
- Genitofemoral nerve (L1-L2)
- Lateral cutaneous nerve of thigh (L2-L3)
- Femoral nerve (L2-L4)
- Obturator nerve (L2-L4)
-Lumbosacral trunk (L4-L5)–>(S1-S4)
Nerves of lumbar plexus at L1 and areas they supply/innervate
- Ilihypogasteric –> Abdominal muscles, skin overlying iliac crest, hypogastric region
- Ilioinguinal –> abdominal muscles, skin of genital and skin of medial thigh region
Genitofemoral nerve level, branches, areas it supplies
- L1-L2
- comes out of psoas major
-Femoral branch –> skin on anterior surface of thigh - Genital branch –> cremaster muscle, skin of genitals
Lateral cutaneous nerve of the thigh level, area it supplies
- L2-L3
- travels along iliacus
- Skin on anterolateral surface of thigh
landmark for femoral and obturator nerves
psoas major
pathway and areas femoral nerve and obturator nerve supply
Femoral nerve –> lateral to psoas, and supplies iliacus and region of anterior thigh
Obturator nerve –> medial to psoas, supplies region of medial thigh
