chapter 17 pelvis Flashcards

1
Q

what is the function of the pelvis

A

supports weight of body through the vertebral column
receives ground forces when foot contacts the ground

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2
Q

what are the bones structure of the pelvis

A

Sacrum
Coccyx
Two pelvic (hip) bones each with:
Ilium
Ischium
Pubis

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3
Q

define the lumbosacral joint

A

L5 & S1
disk & vertebral bodies : cartilaginous joint &
2 facet joints: synovial joints

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4
Q

define the sacroiliac joint

A

nonaxial synovial joints

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5
Q

define the symphysis joint

A

Cartilaginous joint

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6
Q

what is the function of the sacroiliac joint

A

Transmit weight from the upper body through the vertebral column to the hip bones
Designed for stability (not mobility)
2-3 mm motion

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7
Q

the sacrum were does it articulates

A

Articulates with L5 at an angle called the 
“lumbosacral angle”

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8
Q

the posterior side of sacrum define the auricular surface

A

forms SI Joint b/n sacrum and ilium)

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9
Q

superior articular process define

A

forms Lumbosacral joint – between L5 & Sacrum

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10
Q

what does psis and the attachment

A

posterior superior iliac spine attachment for posterior SI ligaments

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11
Q

the posterior inferior iliac spine the attachment

A

sacro-tuberous ligament

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12
Q

the ischial tuberosity function

A

weight bearing surface when you are sitting

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13
Q

interosseous sacroiliac function

A

Deepest, shortest, and strongest of the sacroiliac ligaments.

Connects the tuberosity of the ilium to the sacrum

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14
Q

short posterior sacroiliac

A

Prevents forward movement of the sacrum

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15
Q

long posterior sacroiliac

A

Prevents downward movement of sacrum

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16
Q

what are the function of the sacrotuberous

A

Attachment for gluteus maximus
Prevents forward rotation of the sacrum
Strong, triangular-shaped
Running from
Between the PSIS and PIIS
Posterior and lateral side of the sacrum inferior to auricular surface
Coccyx

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17
Q

the function of sacrospinous

A

This and sacrotuberous ligament convert the greater sciatic notch into a foramen
For sciatic nerve passage

Triangular-shaped
Deep to the sacrotuberous ligament

Broad attachments
Lower, lateral sacrum and coccyx, posteriorly
Spine of the ischium

18
Q

the pubic symphysis the function

A

Cartilaginous Joint
Fibrocartilage disk lies between the two pubic bones
Allows for slight movement during childbirth

19
Q

Angle ↑ if pelvis tilts its

A

anteriorly

20
Q

Angle ↓ if pelvis tilts its

A

posteriorly

21
Q

Forward movement of L5 on S1 prevented by

A

Ligamentous support
Shape and fit of inferior articular process of L5 inside
Superior articular process of S1 behind

22
Q

what landmarks are used to determine if the pelvis is anteriorly or posteriorly

A

ASIS (Anterior Superior Iliac Spine)
Pubic Symphysis

23
Q

what is the neutral angle of pelvis

A

30

24
Q

an increase of the lumbar sacral angle increase what force

A

shear force between the l5 between s1

25
Q

when the lumbosacral increased angle is

A

increased lordosis is anterior tilt, hip flexion

26
Q

posterior pelvic tilt is when

A

the lumbar spine (lower spine) moves posterior also – which decreases the lumbosacral angle- flexion

thus hip is using extensor

27
Q

what is a force couple in the anterior pelvic tilt

A

muscles on the anterior aspect of the body is pulling the anterior pelvis down while the muscles on the back of the body are pulling the posterior aspect of the pelvis up – then you have an anterior pelvic tilt

28
Q

what are the muscles for posterior tilt

A

trunk flexors- abdominals

hip extensor

29
Q

To control or limit the amount of lateral tilting

A

Opposite muscle groups work as a force couple
Reversal of muscle function action

30
Q

he right hip becomes closer to the midline thus

A

right hip adduction

31
Q

the left hip angle is now farther from the midline

A

left hip abdcution

32
Q

the sagittal plane of frontal axis is

A

anterior and posterior pelvic tilt

33
Q

frontal plane about a sagittal axis

A

lateral pelvic tilt and pelvic elevation

34
Q

concentric contraction of the right quadratus lumbar to which side of lateral pelvic?

A

left

35
Q

the right quadratus lumborum to which side during pelvic elevation

A

right

36
Q

what movements happens when the pelvic left side rotate forward

A

right medial rotation and left hip lateral rotation

37
Q

what movements happens when the pelvic left side rotate backward

A

right hip lateral rotation and left hip medial rotation

38
Q

what is the effect of the lumbar spine when the pelvic tilt anteriorly

A

lumbar extension

39
Q

what is the effect of the lumbar spine when the pelvic tilt posteriorly

A

lumbar flexion

40
Q

when an individual maintenance a persistent anterior pelvic tilt posture which muscles group is shorted

A

hip flexors, lumbar extensor

41
Q

when an individual maintenance a persistent anterior pelvic tilt posture which muscles group is weaker

A

hip extensor, lumbar flexors

42
Q

name two ligaments that help prevent anterior shear of l 5 and s1

A

Iliolumbar , anterior longitudinal ligaments, lumbosacral