lower extremity - pelvis Flashcards

1
Q

what are functions of the pelvis?

A
  • common attachment for lower extremity & trunk muscles
  • forces transmission between lower extremity & trunk
  • aids muscles to support abdominal & reproductive organs
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2
Q

what does the pelvis connect?

A

the trunk to the lower extremity

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3
Q

what 3 aspects are part of the innominate bone?

A
  1. ilium
  2. ischium
  3. pubis
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4
Q

what 3 aspects are part of the innominate bone?

A
  1. ilium
  2. ischium
  3. pubis
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5
Q

what is another name for the hip bone?

A

innominate/coxal bone

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6
Q

what kind of joint is the sacroiliac joint?

A
  • planar joint in children

- synarthrodial joint in adults

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7
Q

what bones are being articulated in sacroiliac joint?

A
  • sacrum

- coxal bone

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8
Q

motions allowed of sacroiliac joint

A
  • upward/downward
  • anterior/posterior
  • rotations
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9
Q

what rotations occur in sacroiliac joint?

A
  • anterior/posterior

- nutation/counternutation

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10
Q

is the sacroiliac joint stable or unstable?

A

very stable

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11
Q

how is the sacroiliac joint stable?

A
  • presence of thick & strong ligaments

- presence of rough articular surfaces with reciprocal geometry

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12
Q

what precent is the sacroiliac joint responsible for in lower back pain?

A

25%

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13
Q

what ligaments stabilize the sacroiliac joint?

A
  • anterior sacroiliac ligament
  • iliolumbar ligament
  • interosseous ligament
  • short & long posterior sacroiliac ligament
  • sacrotuberous ligament
  • sacrospinous ligament
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14
Q

describe motion of nutation/counternutation

A

nutation: posterior pelvic tilt
counternutation: anterior pelvic tilt

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15
Q

why is proper motion at sacroiliac joints so important?

A
  • decreases stress at the joint

- pain can occur on affected or contralateral side if joint has lower mobility

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16
Q

what muscles reinforce & stabilize the sacroililac joint?

A
  • erector spinae
  • lumbar multifidi
  • diaphragm
  • pelvic floor muscles
  • abdominal muscles
  • hip extensor muscles
  • latissimus dorsi
  • iliacus
  • piriformis
17
Q

which abdominal muscles reinforce & stabilize sacroiliac joint?

A
  • rectus abdominis
  • internal/external obliques
  • transverse abdominis