Part 20: Pelvic Joints and Ligaments Flashcards

1
Q

What are the joints of the pelvis?

A

Sacroiliac, Sacrococcygeal and pubic symphysis

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2
Q

What type of joint is sacroiliac, what is it supported by?

A

Synovial joint (atypical) with fibrocartilage and jagged edges which help prevent movement. Very strong posterior ligaments and weak anterior. Ventral SI ligament - flat band, joins bones above and below pelvic brim. Posterior consists of interosseous SI and dorsal SI ligaments. Stability of sacroiliac joint is achieved through ligaments alone.

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3
Q

What type of joint is sacrococcygeal? What are its ligaments?

A

Symphysis with fibrocartilage. Short ventral SC ligament units bones at front, 2 dorsal SC ligaments posterior (deep and superficial). lateral SC ligaments from transverse process of coccyx to sacrum (completes foramen for anterior rami 5th sacral nerve)

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4
Q

What type of joint is the pubic symphysis?

A

Secondary cartilaginous joint. Each pube is covered with hyaline cartilage joined by mass of transverse fibres. Reinforced by superior pubic ligament above and arcuate pubic ligament below

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5
Q

Where does the sacrotuberous ligament run?

A

From posterior ilium between PSIS and PIIS to transverse tubercles of sacrum and upper transverse tubercles of coccyx. Continuation from this wide area to medial surface of ischial tuberosity.

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6
Q

Where does the sacrospinous ligament run?

A

Broad base at lower part of sacrum/upper coccyx. Narrows as passes laterally to spine of ischium.

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7
Q

What ligaments enclose the lesser sciatic foramen?

A

Sacrotuberous and sacrospinous

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8
Q

Where does the iliolumbar ligament run?

A

Shaped like V lying sideways. Apex is attached to transverse process of L5. Upper band passes to iliac crest and lower band runs lateral to blend with SI ligament

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