lower limb Flashcards
action of muscles of anterior thigh
flex thigh at hip joint
extend leg at knee joint
action of muscles of medial thigh
adduct thigh at hip joint
action of muscles of posterior thigh
extend thigh at hip joint
flex leg at knee joint
iliotibial band is thickening of what muscle
tensor fascia lata
roots of femoral nerve
L2-L4
muscles of anterior thigh
quadriceps femoris
sartorius
iliopsoas
pectineus
innervation of anterior thigh muscles
femoral nerve
4 muscles of quadriceps femoris
rectus femoris
vastus lateralis
vastus medialis
vastus intermedius
insertion of quadriceps femoris
tibial tuberosity via patellar ligament
origin of rectus femoris
ASIS
action of rectus femoris
flexion at hip
insertion of vastus lateralis
linea aspera on posterior femoral shaft
insertion of vastus medialis
linea aspera
insertion of vastus intermedius
anterior femoral shaft
lies deep to rectus femoris
origin of sartorius
ASIS
insertion of sartorius
medial aspect of proximal tibia
action of sartorius
flexes and laterally rotates hip joint
flexes knee joint
insertion of iliopsoas
iliacus and psoas major converge via common tendon onto lesser trochanter of femur
action of iliopsoas
flexion and lateral rotation of hip
origin of pectineus
superior pubic ramus
insertion of pectineus
inferior to lesser trochanter of femur
action of pectineus
flexion and adduction at hip
muscles of medial thigh
adductor brevis adductor longus adductor magnus gracilis obturator externus
action of muscles of medial thigh
adductors of hip
innervation of muscles of medial thigh
obturator nerve (L2-L4)
origin of adductor brevis and longus
pubic bone
insertion of adductor brevis and longus
linea aspera
what lies between adductor brevis and longus?
obturator nerve
origin of adductor magnus
adduct part inferior pubic ramus
hamstring part ischial tuberosity
insertion of adductor magnus
adductor part linea aspera
hamstring part adductor tubercle
innervation of adductor magnus
adductor part by obturator nerve
hamstring part by sciatic nerve
what passes through the adductor hiatus?
femoral artery and vein to reach posterior thigh
what muscle is adductor hiatus in?
adductor magnus
origin of gracilis
pubic bone
insertion gracilis
medial tibia
action gracilis
weak adductor and flexor of hip
weak flexor of knee
origin of obturator externus
external surface of obturator membrane
action of obturator externus
stabilises and laterally rotates hip joint
what artery is the femoral artery a continuation of?
external iliac
what artery supplies the thigh/
profunda femoris, branch of femoral artery
what artery does the femoral artery become and where does this happen?
popliteal artery in popliteal fossa
what artery is obturator artery a branch of?
internal iliac
what nerve is saphenous a branch of?
femoral
borders of femoral triangle
lateral - medial border sartorius
medial - lateral border adductor longus
superior - inguinal ligament
floor of femoral triangle
iliopsoas laterally and pectineus medially
contents of femoral triangle
femoral artery
femoral vein - receives great saphenous vein
femoral nerve
what ligaments form greater and lesser sciatic foramina?
sacrotuberous
sacrospinous
superficial gluteal muscles
gluteus maximus
gluteus medius
gluteus minimus
tensor fascia lata
origin gluteus maximus
posterior ileum
sacrotuberous ligament
sacrum
insertion gluteus maximus
iliotibial tract
some to gluteal tuberosity
action of gluteus maximus
extensor of hip
helps us stand from sitting
lateral rotator of hip
stabilises knee joint
origin gluteus medius and minimus
anterior part of posterior surface of ilium
insertion gluteus medius and minimus
greater trochanter of femur
action of gluteus medius and minimus
abduct and medially rotate hip
origin tensor fascia lata
ASIS
insertion tensor fascia lata
iliotibial tract which inserts onto proximal tibia
action tensor fascia lata
stabilises knee joint when extended
flexes hip joint
innervation gluetus maximus
inferior gluteal nerve
innervation gluteus medius and minimus
superior gluteal nerve
innervation tensor fascia lata
superior gluteal nerve
deep gluteal muscles
piriformis
superior and inferior gemelli
obturator internus
quadratus femoris
insertion of deep gluteal muscles
greater trochanter of femur
origin piriformis
anterior sacrum
what foramen does piriformis pass through
greater sciatic
insertion piriformis
greater trochanter femur
what nerves does sciatic divide into in posterior thigh?
tibial and common peroneal
posterior thigh muscles
semimembranosus
semitendinosus
biceps femoris
hamstring part adductor magnus
hamstring muscles
semimembranosus
semitendinosus
long head biceps femoris
origin hamstring muscles
ischial tuberosity
action hamstring muscles
extend hip
flex knee
innervation hamstring muscles
tibial nerve
insertion semimebranosus and semitendinosus
medial aspect of proximal tibia
insertion biceps femoris
head of fibula
origin short head biceps femoris
linea aspera
innervation short head biceps femoris
common peroneal nerve
action short head biceps femoris
flexes knee
does not move hip joint
origin hamstring part adductor magnus
ischial tuberosity
insertion hamstring part adductor magnus
adductor tubercle of femur
innervation hamstring part of adductor magnus
tibial nerve
action hamstring part of adductor magnus
extends hip
does not move knee
arteries that supply gluteal muscles
superior and inferior gluteal arteries
branches of internal iliac
enter gluteal region via greater sciatic foramen
roots of sciatic nerve
L4-S3
what does tibial nerve innervation?
muscles posterior thigh and posterior leg
what does common peroneal nerve innervated?
muscles of anterior and lateral leg
boundaries of popliteal fossa
superomedial - semimebranosus and semitendinosus
superolateral - biceps femoris
inferomedial and inferolateral - two heads gastrocnemius
what does popliteal artery bifuracte into?
anterior and posterior tibial arteries
which supply the leg
what branches does common peroneal nerve become?
superficial peroneal - lateral leg
deep peroneal - anterior leg
midfoot
navicular
cuboid
cuneiforms
hindfoot
talus
calcaneus
forefoot
metatarsals
phalanges
at what joint does inversion and eversion of foot occur?
subtalar
what forms subtalar joint?
articulation of talus with calcaneum and navicular
muscles of anterior leg
tibialis anterior
extensor hallucis longus
extensor digitorum longus
insertion tibialis anterior
medial cuneiform
action tibialis anterior
dorsiflexion and inversion of foot
innervation of muscles of anterior leg
deep peroneal nerve
insertion extensor hallucis longus
distal phalanx of big toe
action extensor hallucis longus
extends big toes
dorsiflexes foot at ankle
insertion extensor digitorum longus
distal phalanges toes 2-5
action extensor digitorum longus
extend toes
dorsiflexion foot
muscles of lateral leg
peroneus longus
peroneus brevis
origin muscles of lateral leg
fibula
action muscles of lateral leg
evert foot at subtalar joint
innervation muscles of lateral leg
superficial peroneal nerve
insertion peroneus longus
plantar surface medial cuneiform
insertion peroneus brevis
base 5th metatarsal
artery to anterior leg
anterior tibial
what artery does anterior tibial become and where?
dorsalis pedis
once it enters dorsum of foot
artery to lateral leg
fibular artery
branch of posterior tibial
which 2 superficial veins drain the foot?
great saphenous - medially to femoral vein
small saphenous - laterally up posterior leg to popliteal vein
what nerve innervates extensor digitorum brevis?
deep peroneal nerve
nerve supply to muscles of posterior leg
tibial nerve
superficial muscles of posterior leg
gastrocnemius
soleus
plantaris
what do superficial muscles of leg all insert onto?
calcaneus via calcaneal tendon
origin of gastrocnemius
via two heads from distal femur
action gastrocnemius
plantarflexion of ankle
flexion of knee
origin soleus
soleal line on posterior tibia
action soleus
compresses deep veins of leg for venous return
deep muscles of posterior leg
popliteus
tibialis posterior
flexor hallucis longus
flexor digitorum longus
action of popliteus
small degree of rotation of knee
when knee is flexed popliteus rotates knee before flexion begins
action tibialis posterior
plantarflexion and inversion of foot
insertion flexor hallucis longus
distal phalanx of big toe
action flexor hallucis longus
flexed big toe
plantarflexes foot
insertion flexor digitorum longus
distal phalanges of toes 2-5
action flexor digitorum profundus
flexion of toes
plantarflexion of foot
nerve supply to muscles in sole of foot
medial and lateral plantar nerves
terminal branches of tibial nerve
what area does posterior tibial artery supply?
posterior compartment of leg
sole of foot - bifurcates into medial and lateral plantar arteries
what vessels form deep plantar arch of foot?
dorsa pedis and lateral plantar arteries
nerve supply to skin of foot
tibial nerve plantar surface
common peroneal nerve dorsum of foot (and lateral leg)
L1 dermatome
region over inguinal ligament
L2 dermatome
upper anterior thigh
L3 dermatome
medial knee
L4 dermatome
anteromedial leg
L5 dermatome
anteromedial leg (inferior to L4)
S1 dermatome
5th digit/medial side of foot
arteries to hip joint
profunda femoris gives rise to retinacular arteries that supply femoral head, can be torn by fractures
3 ligaments that stabilise hip joint
iliofemoral
pubofemoral
ischiofemoral
what articulates at knee joint?
femoral condyles and tibial condyles
what are the menisci?
C-shaped cartilages that lie on tibial plateaus
wedge shaped, thickest part peripherally and thinnest centrally
deepen tibial condyles for articulation with femoral condyles
middle meniscus
attached to joint capsule and medial collateral ligament
attachments of medial collateral ligament
femur to tibia
and medial meniscus
attachements of lateral collateral ligament
femur to fibula
when are the cruciate ligaments taut?
when knee if extended
attachments anterior cruciate ligament
anterior part intercondylar region of tibia
medial aspect of lateral condyle of femur
function anterior cruciate ligament
prevents tibia moving forward relative to femur
attachments posterior cruciate ligament
posterior intercondylar area of tibia
lateral medial condyle of femur
function anterior cruciate ligament
prevents tibia moving posteriorly to femur
what bones articulate in ankle joint?
distal tibia, distal fibula and talus
what is the ankle mortise?
socket formed by tibia and fibula for talus
what bones articulate in subtalar joint?
talus, calcaneus and navicular