Muscles of the anterior and medial femoral compartments Flashcards
psoas major origin and insertion
O anterior surfaces of bodies and transverse processes of last thoracic and all lumbar vertebrae
I lesser trochanter
what is origin of the iliacus
iliac fossa
iliopsoas
**consists of psoas major and iliacus
what is the action of the iliopsoas muscles
flexes
laterally rotates thigh
what is the psoas major innervated by
ventral rami of spinal nerves L 1 2 3
innervation of psoas major
ventral rami spinal nerves L1,2,3
what is the iliacus innervated by
femoral n (L2, L3)
action of psoas major
flexes and laterally rotates thigh
what is the insertion of the sartorius
medial tibia below condyle with gracilis and semitendinosus muscles at pes anserinus
action of the sartorius
flexes leg and rotates it medially
flexes thigh and rotates laterally
abducts lower limb when knee is locked
what makes up the pes anserinus
graciliis
semitendinosus
and sartorius
action of iliacus
flexion and lateral rotation of thigh
innervation of iliacus
femoral nerve-L2,3
what innervates the sartorius
femoral nerve
what makes up the quads?
rectus femoris vastus lateralis vastus medialis vastus intermedias articularis genu
what component of the quads crosses both hip and knee joint>
rectus femoris
what is the origin of the two heads of the rectus femoris
straight head ASIS
reflected head superior brim of acetabulum
innervation of sartorious
femoral nerve
muscles of quadriceps femoris?
rectus femorisvastus lateralisvastus medialisvastus intermedialis
what is the insertion of the rectus femoris
superior surface of the patella
to tibial tuberosity via patellar ligament
what is the action of the rectus femoris
remember it crosses two joints
flex thigh
extension of leg (knee goes straight)
action of rectus femoris?
flexion of thighextension of leg
what innervates the quads
femoral nerve
innervation of rectus femoris
femoral nerve
which quad is bipennate
rectus femoris
which quad is responsible for maintaining normal patellar tracking
vastus medialis
which quad has an effect on synovial lining of the knee
articularis genu (deepest portion of vastus intermedius)
prevents the synovial membrane from becoming trapped between patella and femur when leg is extended
what is the action of the vastus lateralis
extension of the leg
attachment of iliacus
origin: iliac fossa
insertion: with psoas major to lesser trochanter
innervation of vastus medialis
femoral nerve
action of vastus intermedius
extension of leg
innervation of vastus intermedius
femoral nerve
innervation of articularis genu
femoral nerve
muscles of medial femoral compartment?
pectinusadductor longusadductor brevisadductor magnusgracilisobturator externus
anterior femoral muscles?
psoas major iliacus sartorius rectus femoris vastus lateralis vastus intermedius
vastus medialis
articular genu
action of adductor longus?
adduction, flexion, assists in rotation of thigh
attachments of pectinus?
origin :superior pubic ramus (pectineal line of pubis)
insertion: posterior femur below lesser trochanter (pectineal line of femur)
innervation of pectineus?
femoral nerve, obturator nerve, or both
accessory obturator nerve when present
innervation of adductor longus?
obturator nerve (anterior division)
action of adductor brevis?
adduction, flexion, assists in rotation of thigh
attachments of rectus femoris?
origin:
straight head - AIIS
reflected head - superior brim of acetabulum
insertion:superior surface of patella;
to tibial tuberosity via patellar ligament
attachments of vastus lateralis
origin: anterolateral surface of most of femur
insertion: lateral border of patella; to tibial tuberosity via patellar ligament
attachments of gracilis?
origin:inferior pubic ramus near symphysisinsertion:medial surface of tibia below condyle with sartorious and semitendinosus at pes anserinus
action of gracilis?
adducts thighflexes and medially rotates leg
attachments of vastus medialis
origin: anteromedial surface of most of femur
insertion: medial border of patella; to tibial tuberosity via patellar ligament
innervation of gracilis?
obturator nerve (anterior)
action of obturator externus?
lateral rotation of thigh
attachments of vastus intermedius
origin: most of anterior surface of femur
insertion: deep surface of tendon of rectus femoris and other vastus muscles via aponeurosis
innervation of obturator externus?
obturator nerve (posterior division)
what attaches at pes anserinus?
gracilis, sartorius, semitendinosus
attachments of articularis genu
origin: lower anterior surface of femu
rinsertion: upper portion of synovial membrane of knee joint
anterior femoral muscles?
psoas majo riliacus sartorius rectus femoris vastus lateralis vastus intermedius
vastus medialis
articular genu
attachments of pectinus?
origin: superior pubic ramus
insertion: posterior femur below lesser trochanter (pectineal line of femur)
attachments of adductor longus?
origin: front of body of pubis
insertion: middle portion of medial lip of linea aspera
attachments of adductor brevis?
origin: inferior pubic ramus
insertion: upper one half of medial lip of linea aspera
action of adductor magnus?
entire muscle adducts thigh
proximal - adducts and flexes, assists in rotation
distal - adducts and extends, assists in rotation
innervation of adductor magnus?
proximal - obturator nerve (posterior division)
distal - tibial nerve
attachments of obturator externus?
origin: outer surface of obturator membrane and outer margins of obturator foramen
insertion: trochanteric fossa
how has the understanding of the iliopsoas muscle led to doing crunches instead of straight leg sit ups?
what is the result of overruse of this muscle
because this muscle is working when you have your feet on the ground in a straight leg sit up
whereas if you do a crunch you are more working your abdominal muscles
what does it mean if a patient has pain when they arise from a sitting position
probably an injury to the iliopsoas or overuse
what medial femoral muscle functions both as an adductor and as a hamstring muscle?
the adductor magnus
which adductor muscle has an opening which provides access to vascular structures to pass from the anterior femoral compartment to the popliteal fossa?
adductor magnus
adductor hiatus is what it is called
and the membrane itself is called the vasoadductor membrane
which medial femoral muscle has an action both at the hip and the knee?
gracilis
adducts the thigh
flexes and medially rotates the leg
