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MBBCh 2- ANAT2020A > Bony Pelvis (1) > Flashcards

Bony Pelvis (1) Flashcards

1
Q

Which bones does the pelvic girdle consist of? (3)

A
  • Sacrum
  • 2 x os coxae
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2
Q

Each os coxae consist of
3 bones:

A
  • Ilium
  • Ischium
  • Pubis
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3
Q

What does the sacrum consist of?

A

Sacrum
* 5 fused sacral vertebrae

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4
Q

Sacrum

What are the parts of the upside down triangle? (5)

A
  • Base
  • Apex
  • Ventral surface (pelvic)
  • Dorsal surface
  • 2 lateral margins
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5
Q
A
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6
Q

What is the function of the base of the sacrum?

A
  • Supports weight of
    vertebral column
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7
Q

Sacrum – Base

  • Superior surface:
A

S1

Articular process - L5

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8
Q

Sacrum – Base

  • Anterior margin
    prominent:
A

– sacral promontory

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9
Q
  • Wide wing-like ____ form
A

Ala

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10
Q

Sacrum – Base

What is the pelvic brim called?

A
  • Linea terminalis – pelvic
    brim
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11
Q

Sacrum

  • Apex : (2)
A
  • Projects downwards
  • Joined to coccyx
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12
Q
  • Pelvic Surface
  • Concave –
  • Transverse ridges -
A
  • Concave – smooth
  • Transverse ridges - fusion
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13
Q
  • Pelvic Surface
  • 4 anterior sacral _______
A

foramina

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14
Q

What are the features the dorsal surface?

A
  • Convex and roughened
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15
Q

What are the crests associated with the sacrum? (3)

A
  • Median sacral crest
  • Medial sacral crest
  • Lateral sacral crest
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16
Q

Sacrum

  • Median sacral crest:
A
  • Fused spinous processes
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17
Q

Sacrum

  • Medial sacral crest:
A
  • Fused articular processes – Indistinct ridge
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18
Q

Sacrum

  • Lateral sacral crest:
A
  • Fused transverse processes
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19
Q
  • Sacral hiatus – projection =
A

= sacral horns

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20
Q
  • Posterior sacral _______
A

foramina

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21
Q

What is the shape of the lateral surface of the sacrum?

A
  • Ear-shaped structure
  • Auricular facets/ surface
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22
Q

Sacrum:

What joints are at the sacrum? (2)

A
  • Sacro-iliac joints
  • Behind facet – sacral
    tuberosity
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23
Q

What is the coccyx?

A

3-5 rudimentary segments
Remanent of embryonic tail

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24
Q

What is the Os Coxa? (2)

A
  • Large, irregular bone
  • Cup-shaped hollow
25
Q
  • Acetabulum articulates with =
A

head of femur

26
Q

The Os Coxa forms the ____ and _____ walls of the pelvis.

A

anterior
lateral

27
Q

Os Coxa

  • Joined anteriorly –
  • Joined posteriorly –
A

pubic symphysis
sacro-iliac joint

28
Q
  • Consists of 3 parts:
A
  • Ilium – 2/5
  • Ischium – 2/5
  • Pubis – 1/5
29
Q

Where is the Os Coxa joined?

A

Joined at acetabulum

30
Q

When does the Os Coxa ossify?

A
  • Ossifies at the age of 16
31
Q

Ilium:

  • Superior margin:
A
  • Upper arched margin known as iliac crest
32
Q

Ilium:

  • S-shaped (above): (2)
A
  • Anterior two-thirds
  • Posterior third
33
Q

What are the anterior two-thirds of the margin of the ilium? (2)

A
  • Anterior superior iliac spine (ASIS)
  • Anterior inferior iliac spine (AIIS)
34
Q

ASIS: inguinal ligament & _______

A

sartorius

35
Q

Ilium:
* Posterior third of the margin:(2)

A
  • Posterior superior iliac spine (PSIS)
  • Posterior inferior iliac spine (PIIS)
36
Q

Ilium

Just inferior to posterior inferior iliac spine - _____ ______ ______

A

greater sciatic notch

37
Q

What is shared with the greater sciatic notch?

A

shared by ilium + ischium

38
Q

Ilium:

  • Gluteal surface –
A

lateral surface

39
Q

How is the ilium divided?

A
  • Divided into 4 areas by 3 gluteal lines
40
Q

Ilium:

  • Lines distinct or vague: (3)
A
  • Posterior gluteal line
  • Anterior gluteal line
  • Inferior gluteal line
41
Q
  • Posterior gluteal line
  • Small posterior area gives origin to….
A

the gluteus maximus

42
Q
  • Anterior gluteal line
  • Large anterior area gives origin to…
A

the gluteus minimus

43
Q
  • Anterior gluteal line
  • Between two gluteal lines -
A

gives origin to gluteus medius

44
Q
  • Inferior gluteal line
  • Attachment of:
A
  • Attachment of capsule of hip joint
45
Q

Ilium
Pelvic surface - _____ surface

A

medial

46
Q
  • Pelvic surface – medial surface
  • 3 areas:
A
  • Iliac fossa
  • Arcuate line
  • Posterior sacropelvic surface
47
Q

Ilium:
* Iliac fossa – faces the….

A

greater pelvis (wing/ala)

48
Q

Iliac fossa:
Muscle -

A
  • Iliacus m.
49
Q
  • Arcuate line
    What does it separate?
A
  • Separates iliac fossa from the lesser pelvis
50
Q
  • Posterior sacropelvic surface
  • Smooth anterior surface =
A

auricular surface

51
Q

What does the Posterior sacropelvic surface join?

A
  • Joins to sacrum (sacroiliac joint)
52
Q
  • Posterior sacropelvic surface
  • Rough posterior area =
A

iliac tuberosity

53
Q

What shape is the Ischium?

A
  • U-shaped
54
Q

What are the features of the body of the Ischium? (3)

A
  • Contributes 2/5 of the acetabulum anteriorly
  • Ischial spine
  • Lesser sciatic notch posteriorly
55
Q

Ischium
* Ramus
- Contributes to:

A
  • Contributes to formation of obturator foramen
56
Q

Ischium
* Ramus
- Joins to

A
  • Joins to inferior pubic ramus and forms one pillar of the pubic arch
57
Q

Ischium
* Ramus
- Ischial tuberosity: (2)

A
  • Where the body and ramus join
  • Rough surface for muscles
58
Q
A

MBBCh 2- ANAT2020A (60 decks)

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