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Anatomy Pelvic Girdle Flashcards

1
Q

Lumbosacral dimensions

A

L5 body taller anterior then posterior
IV disc thicker ant then post
L5 Vertebral body widest of all due to weight bearing stress

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2
Q

Lumbarization

A

6 vertebrae: junction b/n S1 and S2, doesn’t fuse

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3
Q

Sacralization

A

Fusion of lumbosacral junction. 4 Vertebrae.

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4
Q

Innominate

A

Ilium, ischium, pubis.

- Connected by Hyaline cartilage until age 25.

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5
Q

Ala (sacrum) formation

A

Formed by fusion of sacral TP.

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6
Q

S.I joint formation

A

Aurical articulations with Ilium.

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7
Q

Coccyx consists of

A

3-5 fused vertebrae

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8
Q

Pelvic Inlet

A

Lat border: Prominent rim on pelvic bone that extends to pubic symphysis
Post border: Body of s1 and Ala.

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9
Q

Pelvic Outlet

A

Inf margin of pubic symphysis

  • Inf rami of pubis and Ischial Tuberosity.
  • Tip of Coccyx
  • Sacrotuberous ligament
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10
Q

Greater (False) Pelvis

A

Superior to the pelvic inlet.

- Considered part of the abddomen.

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11
Q

Lesser (True) Pelvis

A

B/n pelvic inlet and pelvic outlet

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12
Q

Pelvic Cavity

A

Contains and supports Pelvic Viscera.

- Bladder, urethra, rectum, anal canal, reprod. tract.

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13
Q

Perineum

A

Located inferior to the pelvic floor.

  • Contains external genitalia.
  • Contains external opening for G.I.
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14
Q

Pelvic Girdle Consists of

A 
2 S.I joints
2 IV joints
4 Facet joints
2 hip joints
1 pubic symphysis
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15
Q

SI joint classification

A

Diarthrotic (synovial) and Synarthritic (non-synovial).

  • Aurical surfaces: Synovial joints
  • Tuberosities: Connected by interosseus ligaments by by fibrous synarthrosis (non-synovial)
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16
Q

Intrinsic SI Ligaments

A

Posterior Interosseus
Short Post SI
Long post SI
Anterior SI

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17
Q

Extrinsic SI Ligaments

A

Sacrotuberous
Sacrospinus
Iliolumbar

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18
Q

Anterior SI Ligament

A

Attaches from ant sacrum to anterior ilium.

  • Fiber direction: Lat and inferior
  • Prevents Ilial outflare.
19
Q

Short Post SI ligament

A
  • Short and thick
  • Attachment: PSIS promontory to area of sacral sulcus.
  • Possibly limits all ilial motion on sacrum, mainly anterior rotation of ilium on sacrum.
  • Tender w/ S.I malalignment.
20
Q

Long post S.I ligament

A
  • Inf margin of PSIS to lowr 1/2 of sacrum.
  • Checks ant ilial rotation on sacrum.
  • Check coutnernutation: Post rotation of sacrum on ilium.
21
Q

Nutation

A

Flexion of sacrum

22
Q

Counternutation

A

Sacrum extension, BB

23
Q

Sacrotuberous ligament

A
  • Attaches from Ischial tuberosity to distal 1/3 of sacrum.

- Checks ipsilateral sacral rotation, sacral flexion, and ilial posterior rotation.

24
Q

Sacrospinous Ligament

A

Attaches from inferior lateral angle of anterior sacrum to ischial spine.
- May be stressed in sacral rotations.

25
Q

Pubic Symphysis Joint Classification

A

Synarthroses, Cartilaginous, Symphysis

26
Q

Pubic Symphysis Ligamentous Support

A
  • Sup and inf pubic ligaments

- Check in and sup shear.

27
Q

Sacrococcygeal Joint Classification

A

Synarthrosis. Cartilaginous, IV disc

28
Q

Sacrococcygeal ligamentous support

A

Ant SC ligament

Post SC ligament

29
Q

Lumbosacral Joint classifications

A

Amphiarthrodial

- Facets are synovial and planar

30
Q

Amphiarthrodial

A

Limited motion

31
Q

Ilial movement biomechanics

A

Ant rotation: 5 degrees.
- ASIS moves inferior and anterior.
Post rotation:
- 5 degrees, ASIS moves sup and post.

32
Q

Inflare

A

ASIS moves anterior and medial

33
Q

Outflare

A

ASIS moves posterior and lateral

34
Q

Upslip

A

Superior shear

35
Q

Downslip

A

Inferior shear

36
Q

Sacral flexion movement (nutation)

A
  • base moves anterior

- occurs during exhalation and lumbar extension

37
Q

Sacral extension movement (counternutation)

A
  • Base moves posterior

- Occurs during inhalation and lumbar flexion.

38
Q

Posterior Musculature supporting SI joint

Extension

A 
lats
glut max
hamstring
multifidi
erector
guad lumborum
GOGOQ's
39
Q

Anterior Musculature supporting SI joint

Flexion

A 
Transverse Abdominus
Obliques
Rectus Abdominus
Iliopsoas
Rectus Femoris
Sartorius
TFL
Piriformis
40
Q

Lateral musculature supporting SI joint

Abduction

A

Glut med
Glut min
TFL

41
Q

Medial musculature supporting SI joint

Adduction

A 
adductor : longus
brevis
magnus
pectineus
gracilis
42
Q

Lumbar Plexus

A 
Formed by anterior rami L1-L3, most of L4.
Braches to know:
Femoral n.
Lateral cutaneous n. of thigh.
obturator
43
Q

Sacral Plexus

A

Anterior Rami S1-S4, L4-L5
- most nerves run through sciatic foramen.
Branches to know:
Sciatic nerve

44
Q

Lumbosacral Plexus

A

L4-S2

- Piriformis can gice you sciatic like symptoms

Anatomy (10 decks)

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