Lower Extremities Flashcards
Strongest flexor muscle
Iliopsoas
Only extensors of the leg
Quadriceps muscle: Rectus femoris Vastus lateralis Vastus intermedius Vastus medialis
What compt of the thigh does these muscles belong? Iliopsoas Quadriceps femoris Tensor fascia lata Sartorius Pectineus
Anterior compartment
The ANTERIOR compt of thigh is innervated by what nerve?
Femoral nerve
What compt of the thigh does these muscles belong? ADDUCTOR longus ADDUCTOR brevis ADDUCTOR magnus Gracilis
Medial compartment
The MEDIAL compartment of the thigh is supplied by what nerve?
Obturator nerve
The POSTERIOR compartment of the thigh is supplied by what nerve?
Sciatic nerve
What compt of the thigh does these muscles belong? SEMItendinosus SEMImembranosus Biceps femoris Adductor magnus
Posterior compartment
Thigh muscle with dual innervation
Adductor magnus
Origin of sartorius and TFL
ASIS
Origin of rectus femoris
AIIS
Common insertion of iliacus and psoas
Lesser trochanter of the femur
Common insertion of the quadriceps femoris
Patellar tendon
Contents of femoral triangle
NAVEL
Femoral Nerve, (Sheath), Artery, Vein, Lymphatics
lat to med
Contents of femoral sheath
Femoral artery (lat) Femoral vein (intermediate) Femoral canal (medial)
Funnel-shaped fascial tube formed by inferior prolongation of the ilioposoas and transversalis fascia of the abdomen
Femoral sheath
Nerve blocked in femoral vein catheterization
Genitofemoral n.
Femoral vein lies _____ to the femoral a.
medial
Contents of the adductor canal
Femoral artery and vein
Saphenous nerve
Nerve to vastus medialis
Extensor of thigh
Gluteus maximus
Adbuctor and medial rotator of the thigh
Gluteus medius
Lateral rotator of the thigh
Piriformis
Action and innervation of the anterior compt of thigh
Flexion
Femoral nerve
Action and innervation of posterior compt of thigh and gluteus maximus
Extension Sciatic n (post compt) Inferior gluteal (g. maximus)
Action and innervation of medial compt of thigh
ADduction
Obturator n.
Action and innervation of gluteus medius and minimus
ABduction
6 Branches of Lumbar Plexus
Iliohypogastric Ilioinguinal Genitofemoral Lat Femoral Cutaneous Femoral Nerve Obturator Nerve
Spinal roots in lumbar plexus
L1-L4
Supplies lower part of the ant abdominal wall
IlioHYPOGASTRIC
Supplies skin of groin and scrotum/ labia majora
IlioINGUINAL
Responsible for cremasteric reflex
Genitofemoral nerve
Supplies skin over the lateral surface of the thigh
Lateral femoral cutaneous n.
Largest branch of the lumbar plexus; supplies muscles on anterior thigh and skin on the antero-medial aspect
Femoral n.
Supplies the medial thigh muscles and skin on the medial aspect of thigh
Obturator n.
Area innervated by the sciatic n.
Skin of the foot and leg, post thigh muscles
Nerve assoc w/ weakened abduction of the thigh by gluteus MEDIUS; “waddling gait”
Superior gluteal n.
Weakness in lateral rotation and flexion of the thigh
Inferior gluteal n.
Fascial compartments of the thigh
Anterior, posterior and medial
What nerve is affected when there is diff in climbing the stairs or rising from a chair? Presents with weakness in laterally rotating and extending the thigh.
Inferior gluteal n.
Safest part of the buttock for IM injections
Superolateral
Condition where the sciatic nerve is assoc w/ pain radiating from the back of the thigh to the lower back
Sciatica
Abscess of the psoas major can irritate what nerve?
presents as weakness in flexing the thigh and extending the leg
Femoral n.
Nerve affected when harvesting for CABG; presents with pain on the medial aspect of the leg and foot; no motor loss
Saphenous nerve
Nerve lesioned in the pelvis; diff in adducting the thigh; (+) paresthesia in the skin of the medial thigh
Obturator n. lesions
Decreased angulation of the femur;
caused by fracture of the neck;
ABduction limited
Coxa vara
Increased angulation of the femur;
caused by congenital dislocation;
ADduction limited
Coxa valga
Where does the femoral shaft fracture commonly occur?
Upper third
Dreaded complication of femoral neck fracture
Avascular necrosis
MSK PE finding in pt w/ femoral neck fracture
Shortened with lateral rotation
Common location of femoral neck fracture among the elderly
Subcapital
Common location of the femoral neck fracture in the young
Trochanteric
Branch of the deep femoral a. that is the major supply of the femoral head
Medial femoral circumflex artery
Dislocation of the head of the femur usually occurs in what direction?
Posterior
3 compartments of the leg
Anterior
Lateral
Posterior
Action and innervation of the anterior leg muscles?
Dorsiflexion and extension
Deep peroneal n.
Action and innervation of the lateral leg muscles
Evertion and weak plantar flexion
Superficial peroneal n.
Action and innervation of the posterior leg muscles
Plantar flexion and flexion of the leg
Tibial n.
Common insertion of the posterior leg muscles
Achilles tendon