Trunk and Pelvis Muscles Flashcards
Erector Spinae
Causes pelvic ANT tilt
Adds compressive forces
Stabilizes SIJ
Produces power for lifting
Interspinalis Intertransversarri
Assist with segmental stability, proprioception, and feedback
Quadratus Lumborum
Important for lumbopelvic motion
Stabilizer in sustained posture and heavy lifting
Eccentric contraction
Multifidus
Controls flexion and anterior shear forces
Important for segmental stability
Atrophy and delayed muscle onset in LBP
Iliopsoas
Compression and anterior shearing
Hip flexion, trunk flexion
Transverse Abdominis
Anticipatory action during limb and trunk movement
Major stabilizer
Internal and External Oblique
Pelvic rotation
Thoracolumbar Fascia
Stability of lumbopelvic region
Prevents Anterior Shearing
Define Global Muscles
Superficial muscles
Attachment from pelvis to ribs or lower/upper extremities
Provide mobility and general stability
List the Global Muscles
Rectus Abdominis
Int and Ext Obliques
Erector Spinae
Thoracic part of lumbar iliocostalis
Lateral fibers of quadratus lumborum
Define Local Muscles
Deep muscles
Segmental attachment
Provide segmental stability and stiffness
List the Local Muscles
Multifidus
Diaphragm
Pelvic Floor
Transverse Abdominis
Medial fibers of quadratus lumborum
Lumbar portions: iliocostalis/longissimus
Posterior fibers of the int obliques that attach to TLF
How do Global muscles respond to pain?
Overactivation
How do Local muscles respond to pain?
Inhibition
Movements of Glute Max
Ext
ER
ABD
Trunk motion
