lower limb Flashcards
What are the spinal levels for the lumbar plexus?
L1-4
What are the three main nerves that supply the leg from lumbar plexus?
Lateral femoral cutaneous
Femoral
Obturator
What nerve supplies the anterior compartment of the thigh?
Femoral nerve
What nerve supplies the medial compartment of the thigh?
Obturator
What nerve supplies the posterior compartment of the thigh?
tibial nerve (from the sacral plexus)
What are the 4 gluteal muscles?
Maximus, medius, minimus + tensor lascia lata
What are the attachments of gluteus maximus?
Ilium, sacrum
Insert on gluteal tuberosity on posterior femur and IT band fascia
What are the attachment sof gluteus medius?
Back of the ilium crest (deep to maximus)
inserts on greater trochanter of femur
What are the attachments of gluteus minimus?
back of ilium (not crest)
down to greater trochanter of femur
What are the attachments of tensor fascia lata?
anterior ilium
IT band
What is the action of gluteus medius, minimus and TFL?
hip abduction, stabilisation of pelvis
What is the innervation of the gluteal muscles?
Superior and inferior gluteal nerves from the lumbar plexus
What does the superior gluteal nerve innervate?
Gluteus medius, minimus and TFL
What does the inferior gluteal nerve innervate?
gluteus maximus
What are the deep hip rotator muscles?
piriformis
superior gemellus
obturator internus
inferior gemellus
quadratus femoris
obturator externus
What are the attachments of the piriformis muscle?
ventral sacrum, passes through greater sciatic notch, inserts on top of greater trochanter
What neurovascular bundles come out above and below piriformis?
Superior gluteal (above) and inferior gluteal (below)
Where does the sciatic nerve enter the back of the thigh?
underneath piriformis
What are the attachments of superior gemellus?
Ischial spine, greater trochanter
What are the attachments of obturator internus?
internal surface of obturator membrane
greater trochanter
What are the attachments of inferior gemellus?
Between ischial spine and ischial tuberosity
Greater trochanter
What are the attachments of quadratus femoris?
Ischium
intertrochanteric crest
What are the attachments of obturator externus?
external obturator membrane
courses posterior to neck of femur to greater trochanter
What are the hip flexor muscles?
Iliopsoas (iliacus + psoas major)
What are the attachments of iliacus?
iliac fossa
to lesser trochanter of femur
What are the attachments of psoas major?
T12, L1-5 vertebrae + transverse processes
inserts on lesser trochanter
Where do psoas major and iliacus become iliopsoas?
once pass underneath the inguinal ligament
What is the innervation of psoas major?
L2 ventral ramus
What is the innervation of iliacus?
femoral nerve (L2,3,4)
What are the anterior compartment thigh muscles?
Sartorius, pectineus, Vastus lateralis, rectus femoris, vastus medialis, vastus intermedius