Trunk and Pelvis Flashcards Preview

Functional Anatomy > Trunk and Pelvis > Flashcards

Flashcards in Trunk and Pelvis Deck (24):
1

What are the natural curves of the spine?

Cervical lordosis
Thoracic kyphosis
Lumbar lordosis
Sacral kyphosis

2

What is the shape of the fetal spine?

C-shaped. Curve is concave anteriorly/convex posteriorly

3

What is the order of spinal curve development?

1. cervical curve as child begins to hold their head up
2. Thoracic curve as child begins to sit
3. Lumbar curve emerges with standing and walking

4

What are two contributing factors to the lumbar curve in children?

Early tightness in ITB
Imbalance between trunk flexor and extensor strength

5

What are the purposes of spinal curves?

Resist compressive loads
Strategic planning for visceral organs

6

What is the trabecular system?

Structural development that manages stress and strain as a result of force

7

What do the vertebral discs respond to?

Respond to compressive loads

8

What ligament limits extension?

Anterior longitudinal ligament

9

What position places the most force on the intervertebral discs?

SITTING HUNCHED OVER!!!!!

10

What are the different motions at the spine?

Flexion, extension, lateral rotation, side bending

11

What are three variables in spinal motion?

Coupling
Amount
Direction

12

What does the line of gravity fall through in standing?

Mastoid process
C1
C7
T10
S1

13

What are the two different categories that act to maintain equilibrium of the spine?

Passive tension
Active muscular contraction

14

What happens to the spine and pelvis during an anterior pelvic tilt?

Lumbar extension and hip flexion

15

What happens to the spine and pelvis during a posterior pelvic tilt?

Lumbar flexion and hip extension

16

What passive structure prevents movement when the pelvis tilts posteriorly? Which muscles need to support during PPT?

Iliofemoral ligament prevents movement.
Since the COG is over the hip, no muscular support is needed

17

What first contracts when the pelvis tilts anteriorly?

The hamstrings

18

What muscle contracts when the pelvis tilts very far anteriorly?

The gluteus maximus

19

What is the role of lumbar-Pelvic rhythm?

Increase total ROM
Less flexibility required of the spinal column
Reduce load on the erector spine (during flexion)

20

Which muscles act on the SI joint?

NO muscles directly act on the SI joint but all muscles that cross the joint act on the hip or limber spine

21

How many degrees of movement are there at the SI joint?

btwn 1-2 degrees

22

What does the SI joint act as?

Acts as a stress reliever for the pelvic ring

23

What is sacral nutation?

Sacral flexion (happens opposite of posterior pelvic tilt)

24

What is sacral counter-nutation?

Sacral extension (happens opposite of anterior pelvic tilt)