Lower Limb Flashcards
Lower limb
-articulates with the acetabulum of the pelvic girdle
-consists of gluteal, thigh, knee, leg, ankle, and foot regions
femur
-longest bone in the body
-articulates with acetabulum and tibia
greater trochanter
-part of femur
-attachment for glute muscles, piriformis, and vastis lateralis
lesser trochanter
-part of femur
-attachment for psoas major and iliacus
intertrochanteric crest
attachment for quadratus femoris
intertrochanteric line
attaches vastus intermedius and vastus medialis
gluteal tuberosity
attach glute maximus
linea aspera
attaches vastus lateralis, vastus medialis, adductor muscles, and bicep femoris
medial and laterl condyles
articulate with tibia
medial epicondyle
attaches medial collateral ligament of knee, adductor magnus via adductor tubercle, and gastrocnemius
lateral epicondyle
attaches lateral collateral ligament of knee joint and patellar surface
patella
-kneecap
-articulate with femur
-sesamoid bone (within a tendon)
-protects knee joint and acts as a lever
patella parts
-apex
-base
-medial and lateral articular surfaces
Tibia
-shinbone
lateral condyle of tibia
articulate with femur
fibular articular facet
articulates w head of fibula forming superior tibiofibular joint
tibial tuberosity
attaches patellar ligament
shaft of tibia
contains anterior border and crest
fibular notch of tibia
articulates with fibula forming inferior tibiofibular joint
medial malleolus
part of ankle joint
head of fibula
articulates with lateral condyle of tibia
lateral malleolus of fibula
part of ankle joint
tarsals
articulate with tibia and fibula and metatarsals
tarsals
talus, calcaneus, cuboid, navicular, lateral cuneiform, intermediate cuneiform, medial cuneiform
calcaneous
attaches achilles tendon
metatarsals
articulate with tarsals and phalanges, heads from the ball of the foot
phalanges
-2-5 have a proximal, middle, and distal phalanx and 1st digit has proximal and distal phalanx
-articulate w metatarsals
functions of three arches in the foot
-shock absorption
-supported by interlocking tarsal bones, strong ligaments, and pull of tendons
3 arches in the foot
-medial longitudinal arch
-lateral longitudinal arch
-transverse arch
medial longitudinal arch
high arch produced by the talus at the talonavicular joint
lateral longitudinal arch
low arch mostly produced by the cuboid
transverse arch
follows tarsometatarsal joints
superficial fascia
-deep to the skin
-loose connective tissue, adipose, superficial veins, lymphatic vessels, and cutaneous nerves
deep fascia
-strong
-envelopes muscles to improve muscle contraction
-aids in venous blood flow return to heart
fascia lata
thigh
crural fascia
leg (continuous with fascia lata)
saphenous opening of fascia lata
allow great saphenous vein to drain into femoral veini
iliotibial tract (band)
-lateral thickening of the tensor fascia that runs from ilium to tibia
-shared distal tendon of tensor fascia lata and gluteus maximus
fascial intermuscular septa
project internally to attach bone to create rigid compartments of the thigh and leg
anterior thigh muscles
iliopsoas, sartorius, pectineus
iliacus and psoas major
-flex thigh or trunk
-innervated by femoral nerve
sartorius
-flexes, abducts, and laterally rotates thigh
-innervated by femoral nerve
pectineus
-adducts thigh
-innervated by femoral nerve
Quadriceps femoris
-rectus femoris
-vastus lateralis, medialis, and intermedius
-extends leg
-innervated by femoral nerve
medial thigh muscles
-adductors
-gracilis
-obturator externus
adductors
-adductor brevis, longus, and magnus
-adducts the thigh
-innervated by obturator nerve
gracilis
-adducts thigh
-innervated by obturator nerve
obturator externus
-laterally rotates thigh
-innervated by obturator nerve
femoral triangle
-contain important neurovascular structures
-include femoral nerve, femoral artery, femoral vein, and lymphatics
boundaries of femoral triangle
-lateral: sartorius
-medial: adductor longus
-superior: inguinal ligament
-inferior: iliopsoas and pectineus
adductor canal
-begins at apex of femoral triangle
-an intermuscular pathway for femoral artery and vein
boundaries of adductor canal
-posteromedial: adductor longus and magnus
-anterior: sartorius
-lateral: vastus medialis
gluteal region muscles
-gluteus maximus, medius, and minimus
-tensor fascia lata
gluteus maximus
-extends thigh
-innervated by inferior gluteal nerve
gluteus medius and minimus
-abducts and medially rotates thigh
-innervated by superior gluteal nerves
tensor fascia lata
-tenses iliotibial tract along with gluteus maximus
-innervated by superior gluteal nerve
piriformis
-laterally rotates thigh
=innervated by nerve to the piriformis
obturator internus
-laterally rotates thigh
-innervated by nerve to obturator internus
superior gamellus
-laterally rotate thigh
-innervated by nerve to obturator internus
inferior gamellus
-laterally rotate thigh
-innervated by nerve to quadratus femoris
sciatic nerve exits the pelvis
inferior to the piriformis
gluteal bursae
-flattened membranous sacs containing a capillary layer that produces synovial fluid
-separates gluteal regional muscles from adjacent structures to reduce friction
posterior thigh muscles
-bicep femoris
-semitendinosus
-semimembranosus
bicep femoris
-extends thigh and flexes leg
-long and short head
-innervated by sciatic nerve
semitendenosus
-extends thigh and flexes leg
-innervated by sciatic nerve
semimembranosus
-extends thigh and flexes leg
-innervated by sciatic nerve
anterior leg muscles
-tibialis anterior
-extensor digitorum longus
-extensor hallucis longus
-fibularis longus
-fibularis brevis
tibialis anterior
-dorsiflexes foot
-innervated by deep fibular nerve
extensor digitorum longus
-extends 2-5 digits
-innervated by deep fibular nerve
extensor hallucis longus
-extends big toe
-innervated by deep fibular nerve
fibularis longus
-plantar flexes and everts foot
-innervated by superficial fibular nerve
fibularis brevis
-plantar flexes
-innervated by superficial fibular nerve
extensor retinacula
thickenings of the crural fascia that binds down the extensor tendons
fibular retinacula
thickenings of crural fascia that bind down the fibularis tendons as they pass posterior to the lateral malleolus
superficial lateral leg muscles
-gastrocnemius
-soleus
-plantaris
gastrocnemius
-plantar flexes foot
-innervated by tibial nerve
soleus
-plantar flexes foot
-innervated by tibial nerve
plantaris
-plantar flexes foot
-innervated by tibial nerve
tricep surae
gastrocnemius and soleus
deep posterior leg muscles
-popliteus
-tibialis posterior
-flexor digitorum longus
-flexor hallucis longus
popliteus
-unlocks knee joint by laterally rotating femur on fixed tibia
-innervated by tibial nerve
tibialis posterior
-plantar flexes and inverts foot
-innervated by tibial nerve
flexor digitorum longus
-plantar flexes and inverts foot
-flex 2-5 digit
-innervated by tibial nerve
flexor hallucis longus
-plantar flex and invert foot
-flex big toe
-innervated by tibial nerve