Pelvic Girdle

Question 1

what bones form the innominate bone?

Answer 1

ilium
ischium
pubis

Question 2

what is the pelvic girdle made up of?

Answer 2

2 innominates (Os coxae) and the sacrum

Question 3

what is the purpose of the pelvis?

Answer 3

is a link between the upper and lower body, major weight bearing structure

Question 4

is the pelvis sexually dimorphic?

Answer 4

yes, most sexually dimorphic portion of the skeleton

Question 5

what is the greater and lesser pelvis?

Answer 5

greater (false) pelvis sits above the inlet
lesser (true) pelvis sits below the inlet

Question 6

what does the pelvis articulate with?

Answer 6

sacrum - auricular surface
femur - acetabulum
each other - pubic symphysis

Question 7

what are the gluteal lines?

Answer 7

the lines on the ilium indicating where the gluteal muscles attach

Question 8

where does the inguinal ligament attach to the ilium?

Answer 8

the anterior superior iliac spine to the pubis - pubic tubercle

Question 9

where does satorius attach to the ilium?

Answer 9

the anterior superior iliac spine to the tibia - upper medial

Question 10

what is the function of satorius?

Answer 10

flexion, lateral rotation and abduction of the thigh at the hip joint

Question 11

where does tensor fasciae latae attach to the ilium?

Answer 11

the anterior superior iliac spine to the tibia - via iliotibial tract

Question 12

what is the function of tensor fasciae latae?

Answer 12

flexion, abduction and rotation of the thigh

Question 13

where does rectus femoris attach to the ilium?

Answer 13

the anterior inferior iliac spine to patella - anterior head

Question 14

what is the function of rectus femoris?

Answer 14

extension of leg at knee joint and flexion of thigh at hip joint

Question 15

where does the iliofemoral ligament attach to the ilium?

Answer 15

the anterior inferior iliac spine to femur - intertrochanteric line

Question 16

what is the function of the iliofemoral ligament?

Answer 16

maintains pelvis position and keeps the femoral head in acetabulum

Question 17

where does iliacus attach to the ilium?

Answer 17

the iliac fossa to femur - lesser trochanter

Question 18

what if the function of iliacus?

Answer 18

flexes the thigh at hip joint

Question 19

where does ligamentum teres attach to the ilium?

Answer 19

acetabulum, from femur - fovea capitis

Question 20

what is the function of ligamentum teres?

Answer 20

prevent displacement of the femur

Question 21

where does transverse acetabular ligament attach to the ilium?

Answer 21

at the edge of acetabulum, across acetabular notch

Question 22

what is the function of transverse acetabular ligament?

Answer 22

prevent displacement of the femur

Question 23

where does the inguinal ligament attach to the pubis?

Answer 23

pubic tubercle

Question 23

what is the function of pectineus?

Answer 23

thigh flexion and adduction

Question 23

where does pectineus attach to the pubis?

Answer 23

the pectineal line of superior ramus of the pubis, to femur - lesser trochanter and linea aspers

Question 23

where does adductor magnus attach to the pubis?

Answer 23

inferior pubis ramus (also ischial tuberosity) to femur - linea aspera and adductor tubercle

Question 24

what is the function of adductor magnus?

Answer 24

thigh adduction, extension and rotation

Question 25

where does adductor longus attach to the pubis?

Answer 25

anterior pubis to femur - linea aspera

Question 26

what is the function of adductor longus?

Answer 26

thigh adduction, flexion and medial rotation

Question 27

where does biceps femoris attach to the ischium?

Answer 27

the ischial tuberosity (long head, short head from femur) to fibula (later head) and tibia (lateral condyle)

Question 28

what is the function of biceps femoris?

Answer 28

knee flexion and rotation, hip extension

Question 29

where does semitendinosus attach to the ischium?

Answer 29

ischial tuberosity to tibia - medial diaphysis

Question 30

what is the function of semitendinosus?

Answer 30

knee flexion and rotation, hip extension

Question 31

where does semimembranosus attach to the ischium?

Answer 31

ischial tuberosity to tibia - posterior medial condyle

Question 32

what is the function of semimembranosus?

Answer 32

knee flexion and rotation, hip extension

Question 33

what is accessory iliac and sacral facets?

Answer 33

articulations between ilium and sacrum other than at position of auricular surface non-metric trait

Question 34

what is a pre-auricular sulcus?

Answer 34

groove just inferior to caudal limb of auricular surface non-metric trait

Question 35

what is an acetabular crease?

Answer 35

groove penetrating the lunate surface from the superior margin of the acetabular notch near the trace of the triradiate suture non-metric trait

Question 36

what is dorsal pitting?

Answer 36

eroded areas on the pubic body non-metric trait

Question 37

what can cause an underdeveloped acetabulum?

Answer 37

linked with congenital hip dysplasia non-metric trait

Question 38

what is the difference between the greater sciatic notch in males and females?

Answer 38

male - narrow and deep female - shallow and wide

Question 39

what is the difference between the auricular surface between males and females?

Answer 39

male - depressed and wide female - raised and narrow

Question 40

what is the difference between the preauricular sulcus in males and females?

Answer 40

male - not present or illusionary female - often present or well developed

Question 41

what is the difference between the postauricular space between males and females?

Answer 41

male - narrow female - wide

Question 42

what is the difference between the ilium shape of males and females?

Answer 42

male - high and vertical female - laterally divergent

Question 43

what is the difference between the pubic symphysis in males and females?

Answer 43

male - higher female - lower

Question 44

what is the difference between the subpubic angle in males and females?

Answer 44

male - narrow V-shaped, acute angle female - wide U-shaped, obtuse angle

Question 45

what is the difference between the subpubic concavity in males and females?

Answer 45

male - slight to no concavity female - concavity present

Question 46

what is the difference between the ventral arc in males and females?

Answer 46

male - absent female - present as elevated ridge extending inferolaterally across ventral pubis

Question 47

what is the difference between the medial ischiopubic ramus in males and females?

Answer 47

males - broad, flat and blunt. slightly everted females - ridged, sharp edged, everted

Question 48

what is the difference between the shape of the pubic bone in males and females?

Answer 48

male - narrow female - broad and rectangular

Question 49

what is the difference between the dorsal pubic pitting in males and females?

Answer 49

male - absent female - present

Question 50

what is the method used for sex estimation in the pelvis?

Answer 50

Phenice method

Question 51

what 3 features are looked at in the Phenice method?

Answer 51

in order of discriminatory power - ventral arc subpubic concavity medial ischiopubic ramus and requires the pubis to be intact

Question 52

what is the difference between the sacrum shape in males and females?

Answer 52

male - long and narrow female - short and broad

Question 53

what is the difference between the number of segments of the sacrum in males and females?

Answer 53

male - 5+ female - 5

Question 54

what is the difference between the body/alae proportions in males and females?

Answer 54

male - body wider female - thirds

Question 55

what does sexual dimorphic features occur in the pelvis?

Answer 55

after puberty