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51 terms

Muscles of thigh

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anterior
group of muscles that flex thigh at hip or extend leg at knee
medial
group of muscle that adduct thigh (adductor (groin) muscles)
posterior
group of muscles that flex the leg at knee and extend thigh at hip (hamstring muscles)
sartorius m.
longest muscle in the body
sartorius m.
(o) anterior superior iliac spine
sartorius m.
(i) superior part of medial tibia
sartorius m.
(a) crossed leg sitting- 1. flexes thigh at hip, 2. laterally rotates thigh at hip, 3. abducts thigh at hip, 4. flexes leg at knee (muscle acts across both hip and knee joints)... also covers femoral vessels in "adductor canal"
quadriceps femoris m.
largest muscle of body; powerful extensor of leg at knee; consists of 4 heads that unite to form a common tendon that inserts on proximal tibia
muscle head (-cep)
muscle component with an independent area of origin; heads then merge together to form single tendon with single insertion
rectus femoris
(o) anterior inferior iliac spine... ("rectus=straight)
vastus lateralis
largest part of quadriceps; wraps around lateral side of femur
vastus lateralis
(o) from posterior-lateral femur (lateral lip of linea aspera)
vastus medialis
wraps around medial side of femur
vastus medialis
(o) posterior-medial femur (medial lip of linea aspera)
vastus intermedius
deep to all 3 other parts
vastus intermedius
(o) proximal 2/3 of anterior femur
quadriceps femoris m.
(i) tendons from all four parts unite as common quadriceps tendon; patella located within quadricep tendon- acts as fulcrum to increase power and prevent friction between tendon and distal femur; tendon inserts onto tibial tuberosity of proximal tibia as patellar ligament (between patella and tibia)
quadriceps femoris m.
(a) powerful extensor of leg at knee joint; with foot planted-pulls thigh forward
Adductor (groin) muscles
arise from areas of pubis, ischiopubic rami, and ischial tuberosities and insert on or near linea aspera of posterior femur (except gracilis muscle)... all innervated by obturator nerve (except pectineus muscle)
superficial layer of adductor muscles
pectineus, adductor longus and gracilis muscles
intermediate layer
adductor brevis muscle
deep layer
adductor magnus
gracilis m.
most medial thigh muscle
gracilis m.
(o) inferior pubic ramus
gracilis m.
(i) medial surface, superior tibia
gracilis m.
(a) adducts thigh; flexes leg at knee
pectineus m.
(o) superior pubic ramus
pectineus m.
(i) superior posterior femur
pectineus m.
(a) adducts and flexes thigh
adductor longus m.
(o) upper pubic bone
adductor longus m.
(i) middle posterior femur
adductor longus m.
(a) adducts thigh
adductor brevis m.
(o) inferior pubic ramus
adductor brevis m.
(i) superior posterior femur (lateral to adductor longus)
adductor brevis m.
(a) adducts thigh (this muscle is deep to adductor longus m.)
adductor magnus m.
has adductor and hamstring parts
adductor magnus m.
(o) ishiopubic ramus (adductor part) and ischial tuberosity (hamstring part)
adductor magnus m.
(i) adductor part- posterior femur (entire length of linea aspera); hamstring part- via tendon to adductor tubercle of femur
adductor magnus m.
division between insertions of 2 parts= adductor hiatus for passage of femoral artery and vein into popliteal fossa
adductor magnus m.
(a) adducts thigh; hamstring part also extends thigh at hip joint... adductor magnus is deepest and largest of adductor muscles
hamstring muscles (posterior thigh)
cross posterior to both hip and knee joints- produce extension at hip and flexion at knee
semitendinosus m.
(o) ischial tuberosity
semitendinosus m.
(i) superior end of anterior-medial tibia
semitendinosus m.
named for long, round tendon that forms 1/3 of muscle; inserts on anterior/medial tibia together with gracilis and sartorius m. 3 insertions fuse together to form the "pes anserinus" (gooses foot)
semitendinosus m.
forms the superior-medial boundary of popliteal fossa
semimembranosus m.
(o) ischial tuberosity
semimembranosus m.
(i) posterior side, medial condyle of tibia
semimembranosus m.
named for thin flat tendon that forms upper 1/3 of muscle; runs dee to semitendinosus m.
biceps femoris m.
2 heads of origin; forms superior-lateral boundary of popliteal fossa
biceps femoris m.
(o) long head- ischial tuberosity; short head- inferior, posterior femur(linea aspera)
biceps femoris m.
via common tendon of head of fibula