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Forensic Osteology > Pelvis > Flashcards

Pelvis Flashcards

1
Q

what are the three bones that form the pelvis?

A

ischium
ilium
pubis

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2
Q

what do the inominate bones articulate with?

A

sacrum (via auricular surface)
femur (via acetabulum)
each other (via pubic symphysis)

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3
Q

what is the other name given to the retroauricular area and where is it found?

A

iliac tuberoisty

area superior to the auricular surface

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4
Q

what forms the iliopectineal line?

A

the arcuate line and the pectineal line

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5
Q

what is the significance of the iliopubic eminence?

A

the point that marks the union of the ilium and the pubis

has the iliopectineal line on its border

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6
Q

what is the spina limitans?

A

junction/line between iliac tuberosity (retroauricular surface) and the iliac fossa

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7
Q

what are the three gluteal lines and what attaches to/between each line?

A

anterior, posterior and inferior
buhind posterior: gluteus maximus
between posteiror and anteiror: gluteus medius
between anterior and inferior: gluteus minimus

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8
Q

where is the superior pubic (iliopubic) ramus?

A

between the acetabulum and the pubic symphysis

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9
Q

where is the inferior pubic (ischiopubic) ramus?

A

between the ischial tuberosity and the pubic symphysis

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10
Q

what muscles attach to the ischiopubic ramus? (from lateral to medial)

A 
adductor longus
adductor brevis
adductor magnus
gracilis (inferior to adductor brevis)
obturator externus (superior to adductor brevis)
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11
Q

what muscles attach to ischial tuberosity?

A

semimemembranosus
semitendinosus
long head of biceps femoris

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12
Q

what attaches to the anteiror superior iliac spine?

A

inguinal ligament
sartorius
tensor fasciae latae

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13
Q

what attaches to the anterior inferior iliac spine?

A

rectus femoris

iliofemoral ligament

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14
Q

what ligaments attach to the acetabulum, where do they run and what is their function?

A

ligamentum teres: acetabulum -> fovea capitis of femur
transverse acetabular ligament: at edge, across the acetabular notch
both prevent displacement of the femur

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15
Q

where is gluteus medius and what is its function?

A

anterior gluteal line of ilium -> lateral surface of greater trochanter of femur
extension and rotation of hip

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16
Q

where is gluteus minimus and what is its function?

A

inferior gluteal line of ilium -> anterior border of greater trochanter of femur
extension and rotation of hip

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17
Q

where is gluteus maximus and what is its function?

A

posterior gluteal line of ilium and sacrum -> gluteal tuberosity (via iliotibial tract)
extension and rotation of hip

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18
Q

where does the inguinal ligament run?

A

ASIS -> pubic tubercle of pubis

19
Q

where does sartorius run and what is its function?

A

ASIS -> upper medial tibia

flexion, lateral rotation and abduction of thigh at hip

20
Q

where is tesor fasciae latae and what its its function?

A

ASIS -> lateral condyle of tibia (via iliotibial tract)

flexion, abduction and rotation of thigh

21
Q

where does the ibiotibial tract run and what is its function?

A

iliac tubercle -> lateral condyle of tibia

extension, abduction and lateral rotation of hip; stabilises the knee

22
Q

where is rectus femoris and what is its function?

A

AIIS and superior to acetabulum -> patella (via patellar tendon)
flexion of thigh at hip; extension of leg at knee

23
Q

where does the iliofemoral ligament run and what is its function?

A

AIIS -> intertrochanteric line of femur

maintains position of the pelvis; keeps femoral head in acetabulum

24
Q

where is iliacus and what is its function?

A

iliac fossa -> lesser trochanter of femur

flexion of thigh at hip

25
Q

where is pectineus and what is its function?

A

pectineal line of pubis -> pectineal line of the femur

flexion and adduction of thigh

26
Q

where is adductor magnus and what is its function?

A

inferior pubic ramus and ischial tuberosity -> linea aspera and adductor tubercle of femur
adduction, extension and rotation of thigh

27
Q

where is adductor longus and what is its function?

A

anterior pubis -> medial lip of linea aspera

adduction, flexion and medial rotation of thigh

28
Q

where is biceps femoris and what is its function?

A

ischial tuberoisty (long head) and linea aspera to lateral supracondylar ridge (short head) -> lateral head of fibula and lateral condyle of tibia
extension of thigh at hip
extension and lateral flexion of leg at knee

29
Q

where is semitendinosus and what is its function?

A

ischial tuberosity -> medial diaphysis of tibia

extension of thigh at hip; flexion and rotation of knee

30
Q

where is semimembranosus and what is its function?

A

ischial tuberosity -> posterior medial condyle of tibia

extension of thigh at hip; flexion and rotation of knee, extension of hip

31
Q

what are the non-metric traits of the pelvis?

A

accessory iliac and sacral facets (articulations between ilium and sacrum other than at auricular surface)
pre-auricular sulcus (groove inferior to auricular surface)
acetabular crease (groove in lunate surface)
underdeveloped acetabulum
dorsal pitting (eroded areas on pubic body)

32
Q

sexing the pelvis: difference in the obturator foramen

A

male: large and ovoid
female: small and triangular

33
Q

sexing the pelvis: difference in acetabulum

A

male: large, laterally oriented

female small, anteirorly oriented

34
Q

sexing the pelvis: difference in pelvic inlet shape

A

male: heart shaped, narrow mediolaterally
female: circular/ellipitical, wide mediolaterally

35
Q

sexing the pelvis: difference in true pelvis shape

A

ratio of the true and false pelvis is more equal in males, the false pelvis is larger than true pelvis in female

36
Q

sexing the pelvis: difference in greater sciatic notch

A

male: narrow and deep
female: shallow and wide

37
Q

sexing the pelvis: difference in auricular surface

A

male: depressed, wide
female: raised narrow

38
Q

sexing the pelvis: pre-auricular sulcus

A

males: absent of illusionary
females: often present and well developed

39
Q

sexing the pelvis: difference in ilium shape

A

males: high, vertical
females: laterally divergent

40
Q

sexing the pelvis: difference in subpubic angle

A

males: narrow, v-shaped, acute
females: wide, u-shaped, obtuse

41
Q

sexing the pelvis: subpubic concavity

A

males: slight to absent
females: present

42
Q

sexing the pelvis: ventral arc

A

males: absent
females: elevated ridge extending inferolaterally across the ventral pubis (it’s an additional surface before the pubic symphysis)

43
Q

sexing the pelvis: dorsal pubic pitting

A

males: absent
females: present

Forensic Osteology (8 decks)

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