Transcript Pelvic Girdle Movement and Muscles that Flex the Hip

The Pelvic Girdle
Pelvic Girdle
• The pelvic girdle
(ilium, ischium and
pubis) provides
support and
protection to the
abdominal organs
and transmits force
from the head,
arms, and trunk to
the lower
extremities
Pelvic Girdle Joints
• Seven joints are formed by the pelvic
bones:
– Lumbosacral (1)
– Sacroiliac (2)
– Sacrococcygeal (1)
– Pubis Symphysis (1)
– Acetabulofemoral (2)
Pelvic Girdle Joints
Lumbosacral Joint
• The articulation
between the L5
vertebral body and
the body of the first
sacral segment
Sacroiliac Joint
• The articulation
between the the
sacrum and the ilium
(synovial joint)
Sacrococcygeal Joint
• The articulation
between the sacrum
and the coccyx
Pelvic Girdle Joints
• Pubic Symphysis
– The midline joint
uniting the two
pubic bones
• Acetabulofemoral
Joint
– The ball-andsocket joint
between the head
of the femur and
the acetabulum
Pelvic Girdle
• The hip joint is the most
structurally stable, yet mobile,
single joint in the body.
• The pelvis attaches to the sacrum
at the sacroiliac joint, which in turn
attaches to the spine.
Lumbar Pelvic Rhythm
• Coordinated movement between
the trunk (thoracic and lumbar
vertebrae), the pelvis, and the hip
joints
Movements of the Pelvis
• Anterior Tilt
– Can be created by a protruding abdomen and
is defined as forward tilting and downward
movement of the pelvis
• Posterior Tilt
– Flattening of the low back, trunk extension,
and pelvis moves posterior
• Elevation
– Elevating the pelvis without picking the foot
off the floor
• Depression
• Rotation
Lower Cross Syndrome
• Top of pelvis rotates forward and spine is
pulled forward
• Imagine your pelvis as a bucket of water,
and you were to pour water onto your
toes, that would involve the bucket of
water tilting forward and down. That is
what's referred to as an Anterior Pelvic
Tilt.
• This is common and correlates to lower
back pain
Lower Cross Syndrome
Often coincides with
forward head. Some
of the contributors
include poor body
mechanics,
pregnancy, and
weight gain.
Visual Signs:
Increased curvature of
low back (lumbar)
Pain is often felt in the low
back, pelvis, hips and
thighs.
Lower Cross Syndrome
Tight Muscles:
Weak Muscles:
• Iliopsoas
• Rectus Femoris of
Quadriceps
• Lumbar Erectors
• Quadratus Lumborum
• Hip Adductors:
– Results in internal
rotation of femur and
will shorten the hip
adductors
• Gluteus Maximus
• Hamstrings (Biceps
Femoris,
Semitendinosus,
Semimembranosus)
• Deep Abdominal Wall
Corrective Exercises for Lower Cross
Syndrome
• Postural Cueing
• Stretch the tight
muscles:
–Iliopsoas
–Quadriceps
–Lumbar Erectors
–Hip Adductors
• Strengthen the
weak muscles:
– Posterior Pelvic
Tilt
– SB Bridges
– Plank
– Tube Walking
– Lunges
– Single-leg squat
Posterior Pelvic Tilt
• Most often caused by poor
body mechanics when
standing, slouching or
seated
• Visual signs: Decreased
curvature in low back (flat
back), buttocks tilted down
or tucked under
• Pain is often felt in the
lumbar spine due to
increased spinal
compression
Posterior Pelvic Tilt
• Tight Muscles: • Weak
Muscles:
– Rectus Abdominis
– Hamstrings
• Biceps Femoris
• Semitendinosus
• Semimembranosus
–Hip Flexors
• Psoas Major
• Iliacus
• Rectus Femoris
• Tensor Fascia
Latae
• Sartorius
Corrective Exercises for a
Posterior Pelvic Tilt
• Postural Cueing • Strengthen the
weak
muscles:
• Stretch the tight
– Walking
muscles:
–Cycling
–Rectus
–Elliptical Trainer
Abdominis
–SB Jackknife
–Hamstrings
Pelvic Girdle Movement
Pelvic Motion
Trunk Motion
Hip Motion
Anterior Pelvic Tilt Extension
Flexion
Posterior Pelvic
Tilt
Extension
Flexion