the pelvic girdle and muscles

Question 1

What four bones make up the adult pelvis?

Answer 1

Sacrum
Coccyx
Right os coxae
Left os coxae

Question 2

Which of the bones of the pelvis make up the pelvic girdle?

Answer 2

Ossa coxae (plural)
Os Coxa (singular)

Question 3

What are two anatomical terms for what is commonly called the “hipbone”?

Answer 3

Os coxae
Innominate bone

Question 4

With what features of the sacrum does the pelvic girdle articulate?

Answer 4

Left and right auricular (articular) surfaces

Question 5

With what feature of the pelvic girdle does the head of the femur articulate?

Answer 5

Acetabulum

Question 6

What is the largest and most superior of the three bones of the os coxae?

Answer 6

Ilium

Question 7

What is the wing-shaped portion of the ilium?

Answer 7

Ala

Question 8

What depression lies on the medial side of the ilium?

Answer 8

Iliac fossa

Question 9

What features on the lateral side of the ilium are formed by the gluteal muscles?

Answer 9

Anterior, posterior, and inferior gluteal lines

Question 10

What ear-shaped feature of the ilium articulates with the sacrum?

Answer 10

Auricular surface of the ilium

Question 11

What is the superior ridge of the ilium?

Answer 11

Iliac crest

Question 12

What is the anterior termination of the superior ridge of the ilium?

Answer 12

Anterior superior iliac spine

Question 13

What is the posterior termination of the superior ridge of the ilium?

Answer 13

Posterior superior iliac spine

Question 14

What features lies inferior to the ala of the ilium anteriorly and posteriorly?

Answer 14

Anterior inferior iliac spine
posterior inferior iliac spine

Question 15

Through what part of the ilium does the sciatic nerve pass?

Answer 15

Greater sciatic notch

Question 16

What is the most inferior bone of the os coxae?

Answer 16

Ischium

Question 17

What is the prominent triangular projection of bone posterior to the acetabulum?

Answer 17

Ischial spine

Question 18

What is the indent that is formed by the ischial spine?

Answer 18

Lesser sciatic notch

Question 19

What rough projections of the pelvic girdle bear the weight of the body in the sitting position?

Answer 19

Ischial tuberosity

Question 20

What portion of the ischium fuses with the pubis medially?

Answer 20

Ischial ramus

Question 21

What is the most anterior of the three bones forming the os coxae?

Answer 21

Pubis

Question 22

What part of the pubis articulates with the pubis on the opposite side of the body?

Answer 22

Body

Question 23

What part of the pubis fuses with the ischium?

Answer 23

Inferior ramus

Question 24

What part of the pubis originates at the anterior margin of the acetabulum?

Answer 24

Superior ramus

Question 25

What opening in the os coxae is formed by the pubis and ischium?

Answer 25

Obturator foramen

Question 26

With what feature of the pubis does the inguinal ligament attach?

Answer 26

Pubic tuberacle

Question 27

What is the articulation between the bodies of the pubic bones?

Answer 27

Pubic symphysis

Question 28

On what feature of the pubis does a comb-like muscle originate?

Answer 28

Pectineal line

Question 29

What feature of the pelvis extends from the pubic crest, pectineal line, and arcuate line to the rounded inferior edge of the sacral ala and sacral promontory?

Answer 29

Pelvic brim

Question 30

What portion of the pelvic cavity lies inferiorly and forms a deep bowl?

Answer 30

True pelvis

Question 31

What portion of the pelvic cavity lies superiorly and is enclosed by the ala of the iliac bones?

Answer 31

False pelvis

Question 32

What is the opening surrounded by the pelvic brim?

Answer 32

Pelvic inlet

Question 33

What opening of the pelvic cavity is bordered by the coccyx, the ischial tuberosities, and the inferior border of the pubic symphysis?

Answer 33

Pelvic outlet

Question 34

Sex differences in the pelvis

Answer 34

pubic angle

Question 35

Identify psoas major

Answer 35

origin: transverse processes of L1-L5 insertion: lesser trochanter of femur Action: Flexes hip. rotates thigh laterally. Flexes vertebral column

Question 36

Identify Iliacus

Answer 36

Origin: Iliac fossa Insertion: Lesser trochanter of femur Action: Flexes hip. Rotates thigh laterally

Question 37

By what name are the iliacus and psoas major referred to after they pass deep to the inguinal ligament?

Answer 37

Iliopsoas

Question 38

Identify Gluteus maximus

Answer 38

Origin: Iliac crest, dorsal surface of sacrum and coccyx Insertion: Gluteal tuberosity and iliotibial tract Action: Extends hip. Rotates thigh laterally

Question 39

Identify Gluteus medius

Answer 39

Origin: upper half of lateral surface of the ilium Insertion: Lateral surface of greater trochanter Action: abducts hip, rotates thigh medially

Question 40

Identify Gluteus minimus

Answer 40

Origin: Lower half of lateral surface of ilium Insertion: Anterior surface of greater trochanter Action: Abducts hip, rotates thigh medially

Question 41

Identify Piriformis

Answer 41

Origin: Anterior of the sacrum Insertion: Superior border of greater trochanter Action: laterally rotates extended hip and abducts flexed thigh