Muscles of thigh

51 terms by djgrilli

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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

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