Gluteal & Posterior Thigh Flashcards
Learn Gluteal and Posterior thigh muscles, innervations and actions
Where does gluteus maximus originate?
dorsal ilium, sacrum, coccyx, sacrotuberous ligament and iliac crest
Where does gluteus maximus insert?
gluteal tuberosity and iliotibial tract
Where does the gluteus minimus insert?
Greater trochanter of femur, anterior aspect
Where does the gluteus medius insert?
greater trochanter of femur, lateral aspect
Where does the gluteus medius originate?
ilium, between anterior and posterior gluteal lines
Where does the gluteus minimus originate?
ilium, between anterior and inferior gluteal lines
What innervates the gluteus medius?
superior gluteal N.
What innervates gluteus maximus?
Inferior gluteal N.
What innervates gluteus minimus?
Superior Gluteal N.
What innervates the Tensor fascia latae muscle?
Superior Gluteal N.
Where does the tensor fascia latae insert?
Iliotibial Tract
What are the actions of gluteus maximus?
hip extension and lateral rotation of thigh
What are the actions of gluteus medius?
Stabilization of the pelvis during gait, abduction of thigh, medial rotation of thigh (ant. fibers)
Where does the tensor fascia latae originate?
Iliac crest, lateral aspect
What are the actions of gluteus minimus?
Stabilization of the pelvis during gait, abduction of thigh, medial rotation of thigh (ant. fibers)
What are the actions of tensor fascia latae
Stabilization of the knee in extension, weak hip flexion, abduction of thigh
Where does the piriformis originate?
sacrum, pelvic surface
Where does the piriformis insert?
greater trochanter of femur, medial apsect
Where does the superior gemellus insert?
Greater trochanter, medial apsect via the obturator internus tendon
Where does the superior gemellus originate?
ischium
What innervates the piriformis?
N. to piriformis
What innervates the superior gemellus?
N. to obturator internus
What are the actions of the piriformis?
lateral rotation of thigh
What are the actions of the superior gemellus?
lateral rotation of thigh
Where does the obturator internus originate?
Obturator foramen and obturator membrane, internal aspect
Where does the obturator internus insert?
greater trochanter of the femur, medial aspect
What innervates the obturator internus?
N. to obturator internus
What are the actions of obturator internus?
lateral rotation of thigh
Where does the inferior gemellus originate?
ischium
Where does the inferior gemellus insert?
greater trochanter, medial aspect via the obturator internus tendon
What innervates the inferior gemellus?
N to quadratus femoris
What are the actions of inferior gemellus?
lateral rotation of thigh
Where does the quadratus femoris originate?
ischium
Where does quadratus femoris insert?
quadrate tubercle of the femur
What innervates quadratus femoris?
N. to quadratus femoris
What are the actions of quadratus femoris?
lateral rotation
What are the two heads of the biceps femoris?
long head and short head
Where does the long head of the biceps femoris originate?
ischial tuberosity
Where does the short head of the biceps femoris originate?
linea aspera of femur
Where does the long head of biceps femoris insert?
Head of the fibula, lateral aspect
Where does the short head of biceps femoris insert?
head of the fibula, lateral aspect
What innervates the long head of biceps femoris?
Tibial N. (L4-S3)
What innervates the short head of biceps femoris?
Common Fibular N. (L4-S2)
What are the actions of biceps femoris?
flexion of knee, weak extension of hip, lateral rotation of tibia
Where does the semitendinosus originate?
ischial tuberosity
Where does the semitendinosus insert?
Posterior slip of pes anserinus
What innervates the semitendinosus?
Tibial N. (L4-S3)
What are the actions of semitendinosus?
flexion of knee, weak extension of hip, medial rotation of tibia
Where does the semimembranosus originate?
ischial tuberosity
Where does the semimembranosus insert?
medial aspect of tibial condyle
What innervates the semimembranosus?
Tibial N. (L4-S3)
What are the actions of the semimembranosus?
Flexion of knee, weak extension of hip, medial rotation of tibia
What are the nerves that innervate the gluteal region direct branches of?
Lumbar (L1-S3) and Sacra (L4-S5) plexuses
What are the nerves of the posterior compartment direct branches of?
Tibial (L4-S3) and common fibular (L4-S2) nerves which are components of the sciatic nerve
