gluteal region & posterior thigh Flashcards
glut max. origin
- ileum: posterior to posterior gluteal line
- Sacrum and Coccyx: posterior surface
- Sacrotuberous ligament
glut max. insertion
- lateral condyle of tibia via iliotibial tract
- gluteal tuberosity of femur
glut max. action
- extension of femur
- lateral rotation of femur.
- abduction of femur (upper fibers)
- adduction of femur (lower fibers)
glut max. innervation
Inferior Gluteal Nerve
glut max. artery
superior gluteal artery
glut medius origin
Ileum: between posterior and anterior gluteal lines
glut medius: insertion
greater trochanter of femur: lateral surface
glut medius action:
- abduction of femur
- medial rotation & flexion of femur (anterior fibers)
- Lateral rotation & extension of femur (posterior fibers)
- steadies pelvis when opposite limb is raised
glut medius innervation
superior gluteal nerve
glut medius artery
superior gluteal artery
glut minimus origin
Ileum: between anterior and inferior gluteal lines
glut minimus: insertion
greater trochanter of femur: anterior surface
glut minimus action
- abduction of femur
- medial rotation of femur
- steadies pelvis when opposite limb is raised
glut minimus innervation
superior gluteal nerve
glut minimus artery
superior gluteal artery
tensor of fasica lata origin
ASIS
Iliac Crest
tensor of fasica lata insertion
lateral condyle of tibia via iliotibial tract
tensor of fasica lata action
- medial rotation of femur
- abduction of femur
- flexion at hip
tensor of fasica lata innervation
superior gluteal nerve
tensor of fasica lata artery
superior gluteal artery
periformis origin
sacrum: anterior surface
periformis insertion
greater trochanter of femur: superior border
periformis action
- lateral rotation of femur
- abduction of femur
3.stabilize hip joint
periformis innervation
anterior rami of S1-S2
obturator internus origin
obturator membrane: pelvic surface ( and surrounding bone)
obturator internus insertion
greater trochanter of femur: medial surface (trochanteric fossa of femur)
obturator internus action
- lateral rotation of femur
- abduction of femur
- stabilize hip joint
obturator internus innervation
nerve to obturator internus (L5-S1)
obturator internus artery
superior gluteal artery
periformis artery
superior, inferior gluteal artery
internal pudendal artery
superior gemellus origin
ischial spine
superior gemellus insertion
greater trochanter of femur: medial surface (trochanteric fossa of femur)
superior gemellus action
- lateral rotation of femur
- abduction of femur
- stabilize hip joint
superior gemellus innervation
nerve to obturator internus (L5-S1)
inferior gemellus origin
ischial tuberosity
inferior gemellus insertion
greater trochanter of femur: medial surface (trochanteric fossa of femur)
inferior gemellus innervation
nerve to quadratus femoris (L5-S1)
quadratus femoris origin
ischial tuberosity: lateral border
quadratus femoris insertion
intertrochanteric crest of femur
quadratus femoris action
- lateral rotation of femur
- stabilize hip joint
quadratus femoris innervation
nerve to quadratus femoris (L5-S1)
quadratus femoris artery
inferior gluteal artery
superior gemellus artery
inferior gluteal artery
inferior gemellus artery
inferior gluteal artery
what are the 6 small lateral rotators of the femur?
- periformis
- obturator internus
- superior gemellus
- inferior gemellus
- quadratus femoris
- obturator externus
what are the 3 muscles of the posterior thigh?
- semitendinosus
- semimembrinosus
- biceps femoris (LH & SH)
Semitendinosus origin
ischial tuberosity
Semitendinosus insertion
proximal tibia: medial aspect
Semitendinosus action
- extension of femur
- flexion at knee
- medial rotation of leg
Semitendinosus innervation
tibial division of sciatic nerve
Semitendinosus artery
- femoral artery: perforating branches
- popliteal artery
- inferior gluteal artery
Semimembranosus origin
ischial tuberosity
Semimembranosus insertion
Tibia: medial condyle
Semimembranosus action
- extension of femur
- flexion at knee
- medial rotation of leg
Semimembranosus innervation
tibial division of sciatic nerve
Semimembranosus artery
femoral & popliteal artery: perforating branches
inferior gluteal artery
biceps femoris long head origin
ischial tuberosity
biceps femoris long head insertion
head of fibula: lateral aspect
biceps femoris long head action
- extension of femur (unique to LH)
- flexion at knee
- lateral rotation of leg
biceps femoris long head innervation
tibial division of sciatic nerve
biceps femoris short head origin
lateral lip of linea aspera
biceps femoris short head action
- flexion at knee
- lateral rotation of leg
biceps femoris short head innervation
common fibular division of sciatic nerve
biceps femoris long head artery
deep femoral artery
biceps femoris short head artery
deep femoral artery
what action does biceps femoris LH do that SH doesn’t?
- extension of femur
what is trandelenberg gait
hip of unnafected side drops due to weak hip abductors (glut medius/minimus) (see lecture 9 slide 16)