Superficial Posterior Thigh Muscles Flashcards Preview

Anatomy Exam 3 > Superficial Posterior Thigh Muscles > Flashcards

Flashcards in Superficial Posterior Thigh Muscles Deck (15):
1

Posterior Thigh

Muscles that are prinicpally concerned with extension of the thigh and flexion of the leg

2

Gluteus maximus

Largest of the three, most superficial muscle
Enclosed by the fascia lata
Location: insert into the upper portion of the iliotibial tract
Function: Extend the thigh

3

Gluteus medius

Location: deep to the gluteus maximus
Function: prevent adduction when weight of the body is supported on one leg

4

Gluteus Minimus

Location: deep to the gluteus medius
Function: prevent adduction when weight of the body is supported on one leg

5

Three gluteus muscle

Run in various direction across the posterior pelvis.
Function: during walking, muscles on either side alternate in contractions

6

Ischial Tiberosity

Location: beneath the gluteus maximus
Function: serves as the common origin of the "hamstring muscles" and attaches to the powerful sacrotuberous ligmanet

7

Three Hamstrong muscles

Semitendinosus, semimembranosus and biceps femoris

8

Semitendinosus and Semimembranosus muscles

Location: attach to the medial condyle and adjacent surface of the tibia
Semitendinosus: long stout tendon
Semimembranosus: karge fleshy belly attached to a shortened tendon.

9

Biceps femoris

Consists of two segments: long head, and short head
Location: merge to insert on the lateral condyle of the tibia and the head of the fibula.

10

Long head of the biceps femoris

Location: originating from the ichial tuberosity and sacrotuberous ligament

11

Short head of the biceps femoris

Location: arises along the linea aspera of the femur

12

The hamstring muscles (Function)

Act in unison to extend the thigh and flex the leg
Not nearly as big as the quadriceps femoris muscles
These are weaker muscles and are frequently injured.

13

Popliteal Fossa

Location: btwn the divergence of the hamstring tendons above and the beginning of the gastrocnemius muscles below.
Function: contains abundant lymph nodes as well as the nerves and vessels connecting the thigh and leg.

14

Adductor Magnus

Location: located deep to the biceps femoris and under the gluteus maximus

15

Gracilis Muscles

Function: assists the adductor muscles in movement of the thigh and acts in flexion and medial rotation of the leg.