Thigh muscles Flashcards
What is the innervation of Biceps femoris?
The sciatic nerve L5,S1,S2
where does the long head of biceps femoris originate?
The ischial tuberosity - Inferomedial part
Where does the short head of biceps femoris originate?
Linea aspera - lateral lip
What is the function of biceps femoris?
Extension of thigh
Lateral rotation
Flexes leg at knee joint
Which three muscles make up the hamstrings?
Biceps Femoris
Semimembranosus
Semitendinosus
Where does semitendinosus originate?
Ischial tuberosity - inferiomedial part
Where does semitendinosus insert?
proximal tibia - medial surface
what is the innervation of the hamstring muscles?
Sciatic nerve L5, S1, S2
What is the innervation of semitendinosus?
Sciatic nerve
What is the function of semitendinosus?
Extend thigh at hip joint
Medial rotation
Flexes leg at knee joint
What is the origin of semimembranosus?
Ischial tuberosity - superolateral impression
Where does semimembranosus insert?
Medial tibial condyle - groove and adjacent bone
Which hamstring inserts onto the medial tibial condyle?
Semimembranosus
What innervates the semimembranosus muscle?
Sciatic nerve
What are the functions of Semimembranosus
Extend thigh at hip joint
Medial rotation
Flex leg at knee joint
Which hamstring laterally rotates the thigh?
Biceps femoris
which muscles medially rotate thigh?
Semimembranosus and semitendinosus
Name the two parts of adductor magnus?
The adductor part and the Hamstring part
Where does the hamstring part of adductor magnus originate?
Ischial tuberosity
where does the adductor part of adductor magnus originate?
The ischiopubic ramus
Where does the Hamstring part of adductor magnus insert?
The Supracondyler line and the adductor tubercle
Where does the adductor part of adductor magnus insert?
Linea asper and posterior surface of femur
Innervation of Adductor part of adductor magnus?
Obturator nerve L2,L3,L4
Innervation of Hamstring part of adductor magnus?
Sciatic Nerve L2, L3, L4
What is the function of adductor magnus?
Adducts and medially rotates thigh at hip joint
Where does sartorius originate?
Anterior superior iliac spine
Which muscle inserts into the anterior surface of the tibia, inferolaterally to tibial tuberosity?
Sartorius
Where does Sartorius insert?
Anterior surface of tibia
What is the innervation of sartorius?
Femoral nerve L2,L3
What is the function of sartorius?
Flexes thigh at hip joint
Flexes leg at knee joint
Which muscle originates from transverse processes of T12 to L5 vertebrae?
psoas major
Which muscle originates from the internal surface of the iliac fossa
Iiacus
Where does iliopsoas muscle insert?
lesser trochanter of femur
What is the function of iliopsoas?
Flexion of thigh at hip joint
What is the innervation of the iliopsoas muscle?
Femoral nerve L2,L3
Which muscle originates from both the anterior inferior iliac spine and the ilium?
Rectus femoris
Where does rectus femoris insert?
Quadriceps femoris tendon
Which nerve innervates rectus femoris?
Femoral nerve L2,L3,L4
what is the function of rectus femoris?
Flex thigh at hip joint and extend leg at knee joint
Where does Vastus medialis originate?
Femur - intertrochanteric line, pectineal line, lines aspera, supracondylar line
Where does vastus medialis insert?
Quadriceps femoris tendon and medial margin of patella
all vastus medialis, intermedialis and lateralis are innervated by which nerve?
Femoral nerve
What is the function of vastus medialis, Vastus intermedius, and lateralis?
Extend leg at knee joint
which muscle originates from the external body of pubis, the inferior pubic ramus, and the ramus of ischium?
Gracilis
Where does gracilis insert?
Tibia - medial surface of proximal shaft
Innervation of gracilis?
obturator nerve L2,L3
what is the function of gracilis?
Flexes leg at knee joint
which muscle originates from the pectineal line and adjacent bone of pelvis?
Pectineus
Where does pectineus insert?
line extending from lesser trochanter to line aspera
What is the innervation of pectineus?
Femoral nerve L2,L3
what does pectineus do?
Adducts and flexes thigh at hip joint
Which muscles originate from the external surface of body of pubis?
Adductor longs and adductor brevis
Where does adductor longs insert?
Linea aspera - middle one third of shaft of femur
Which adductor muscles does the obturator nerve innervate?
Adductor longus
Adductor brevis
Adductor part of adductor magnus
What is the function of adductor longus?
Adducts and medial rotates thigh
Which adductor muscle only adducts the thigh and does not medially rotate it?
Adductor brevis
Where does adductor brevis insert?
linea aspera - upper third
which muscle originates from external surface of obturator membrane and bone?
Obturator externus
Where does obturator externus insert?
Trochanteric fossa
What is the innervation of obturator externus?
Obturator nerve
What is the function of obturator externus?
Laterally rotates thigh at hip joint.