The document discusses the anatomy and biomechanics of the pelvis and hip. It describes muscles like the transverse abdominis, iliopsoas, and external hip rotators. It also covers common injuries to the pelvis like tendinitis, bursitis, and sciatica. The sciatic nerve is defined as the longest single nerve in the body. Total hip replacement surgery is briefly mentioned.

1. +
ESS 3092: KINESIOLOGY
Week 11

3. Transverse Abdominis
 Origin
 Iliac crest, inguinal
ligament, thoracolumbar fascia, and
costal cartilages 7-12
Insertion
 Xiphoid process, linea alba, pubic
crest via an aponeurosis
Location
 Deep
 Movements
 Compress the ribs and
viscera, providing thoracic and
pelvic stability

4. +
Pelvis and Hip Motions
Pelvic rotation Lumbar spine motion Right hip motion Left hip motion
Anterior rotation/tilt Extension Flexion Flexion
Posterior rotation/tilt Flexion Extension Extension
Right lateral tilt Left lateral flexion Abduction Adduction
Left lateral tilt Right lateral flexion Adduction Abduction
Right transverse
rotation
Left lateral rotation Posterior rotation Anterior rotation
Left transverse
rotation
Right lateral rotation Anterior rotation Posteriorl rotation

5. +
Which ligament of the hip supports
most of the body weight?
6

6. +
Acetabulofemoral Joint
Ligaments
1. Iliofemoral (Y)
• Supports most of BW
• Supports anterior hip (standing)
• Resists external, internal rotation
• Limits hyperextension
 Only anterior pelvic tilt

7. Acetabulofemoral Joint
Ligaments
2. Pubofemoral
• Resists abduction
(primarily)
• Resists external
rotation (some)
3. Ischiofemoral
• Resists adduction
• Limits internal rotation
No ligaments resist flexion (greatest ROM)
P
A

8. +
Anterior or Posterior View?
9

9. +
Which muscles comprise the
illiopsoas?
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10. +
Iliopsoas – What is it comprised of?
When stabilized
 Flexion of hip
Thigh fixed
 Flexion of trunk
More active in mid-range
 Leg raise or curl-up
 Increased activity- feet held (curl-up)

11. Psoas Major
Origin
 Transverse process of L1-5
Insertion
 Lesser trochanter of femur
Location
 Anterior/Medial
Movements
 Pelvis: Anterior tilt
 Hip: Flexion

12. Iliacus
Origin
 Iliac fossa
Insertion
 Femoral lesser trochanter
Location
 Anterior/Medial
Movements
 Pelvis: anterior tilt
 Hip: flexion

13. 15

14. +
Six External Rotators of the Hip
POG QOG
External rotators
 Piriformis
 Gemellus Superior
 Obturator Internus
 Gemellus Inferior
 Obturator Externus
 Quadratus Femoris
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15. +
Piriformis
 Sciatic nerve passes inferiorly
 Tightness
 Origin
 Anterior surface of lateral
sacrum
Insertion
 Greater trochanter of femur,
along the upper medial surface
Actions
 Lateral rotation

16. +
Gemellus Superior
Origin
Ischial spine
Insertion
Medial aspect of greater
trochanter
Actions
External rotation

17. +
Obturator Internus
Origin
Ischiopubic ramus, obturator
membrane
Insertion
Medial aspect of greater
trochanter
Actions
Lateral rotation

18. +
Obturator Externus
Origin
Obturator membrane and the
adjacent surfaces of the pubic
body and pubic and ischial
rami
Insertion
Trochanteric fossa
Actions
Lateral rotation

19. +
Quadratus Femoris
Origin
Lateral border of ischial
tuberocity
Insertion
Intertrochanteric crest
Actions
Lateral rotation

20. +
Common Injuries of the Pelvis
Tendinitis
Bursitis
Sciatica
Labral tear
Dislocation
Fracture
Osteoporosis
Total hip replacement
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21. +
Sciatic Nerve
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 It is the longest and widest single nerve in the body, going
from the sacrum to the foot on the posterior aspect
 Lubosacral plexus L4-S5

22. +
Sciatica
Pain, tingling, or numbness produced by an
irritation of the nerve roots that lead to the sciatic
nerve
Causes
 The most common cause of sciatica is a bulging or
ruptured disc, pressing against the nerve roots
 It can also be a symptom of other conditions such as
stenosis, bone spurs, arthritis or nerve root compression
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23. +Avg time to diagnose = 2 yr
Can lead to arthritis
May cause contralateral
disfunction of knee, hip, low
back
22% of athletes w/ groin pain
and 55% of those mechanical
hip pain of unknown eiteology
Functions: Deepens the
acetabulum
Increases surface area and
distributes mechanical and
compressive force over a
greater area. Reduces
compressive forces by 92%
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24. +
Dislocation
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25. +
Osteoporosis and Fracture
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26. +
Total Hip Replacement
Video
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27. Movement Analysis:
Anterior Pelvic Tilt/Posterior Pelvic Tilt
Plane
Axis
Action
Agonist
Antagonist
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PHASE
1
2