Trunk and Pelvis Muscle Review Flashcards
Muscle: Main function is back extension
Erector Spinae
Muscle: Provides power when lifting and compresses the spine
Erector Spinae
Muscle: Deep fibers prevent anterior translation during flexion
Erector Spinae
Muscle: Can cause an anterior tilt of the pelvis due to its connection to the thoracolumbar fascia
Erector Spinae
Muscle: Main function is proprioception and feedback
Interspinalis
Intertransversaris
Muscle: Deep segmental muscles
Interspinalis
Intertransversaris
Muscle: Small and close to the axis of motion making them unable to produce power
Interspinalis
Intertransversaris
Muscle: “Fine tune” segmental motion
Interspinalis
Intertransversaris
Muscle: Primary function is side flexion
Quadratus Lumborum
Muscle: Function to stabilize sustained posture and heavy lifitng and is important in lumbopelvic motion
Quadratus Lumborum
Muscle: Provides a stable base for the diaphragm
Quadratus Lumborum
Muscle: Controls flexion and anterior shear forces
Multifidus
Muscle: Important for segmental stability by preventing anterior shearing
Multifidus
Muscle: Christmas tree shaped and largest (in diameter) in the lumbosacral area
Multifidus
Muscle: Primary hip/trunk flexor
Iliopsoas
Muscle: Deepest abdominal muscle that acts like a corset
Transverse Abdominis
Muscle: Important for stability and acts in a anticipatory manner (stabilizing prior to limb and trunk movement)
Transverse Abdominis
Muscle: Prevents anterior shearing due to its attachment to the thoracolumbar fascia
Transverse Abdominis
Muscle: Movement of proximal attachment results in trunk rotation
Internal and External Obliques
Muscle: Movement of bilateral distal attachment results in pelvic tilt
Internal and External Obliques
Muscle: Movement of unilateral distal attachment results in rotaiton
Internal and External Obliques
Muscle: Movement of bilateral distal attachment results in ANTERIOR pelvic tilt
Internal Obliques
Muscle: Movement of bilateral distal attachment results in POSTERIOR pelvic tilt
External Obliques
Describe which oblique is typically dominant and it’s implications
Interal Oblique
Why many people have a sligth anterior tilt to their pelvic posture
Muscle: Main function is the provide stability of the lumbopelvic region and to prevent anterior shearing
Thoracolumbar Facsia
Describe how the thoracolumbar fascia prevents anterior shearing
The TA attaches to the T/L fascia
The T/L fascia has layers of fibers in opposing directions
The load form TA is translation to the T/L fascia which due to its layers brings the spinous processes closer together preventing anterior shearing
Muscle: Passively attached form spinous processes from T12 down
Thoracolumbar Fascia
Type of Muscle: provides mobility
Global Muscle
Type of Muscle: Provides stability
Local Muscle
Type of Muscle: Response to pain with overactivation
Global Muscle
Type of Muscle: Responses to pain with inhibition
Local Muscle
Type of Muscle:
Rectus Abdominis
Internal/External Oblique
Erector Spinae
Lateral Quadratus Lumborum
Thoracic Iliocostalis
Global Muscle
Type of Muscle:
Produce power
Transmit load
Provide overall trunk stability
Global Muscles
Type of Muscle:
Multifidus
Diaphragm
Pelvic Floor
Transverse Abdominis
Medial quadratus lumborum
Lumbar Iliocostalis
Longissimus
Local Muscles
Type of Muscle: Provde segmental stability
Local Muscles
Describe how TA can be either a global or local muscles
If defined by its
attachment = local
function = global
Muscle: Important when returning from trunk flexion
Gluteus maximus
Muscle: Important for pelvic stabilization during weight bearing
Gluteus Medius
Muscle: Funtions in hip extension, ER, ABD, and trunk motion
Gluteus Maximus
Muscle: Functions in hip ABD, IR, ER, and trunk stabilization
Gluteus Medius
5 Trunk Stabilizers
- Abdominals
- Obliques
- Paraspinals
- TA
- Multifidus
2 Pelvic Stabilizers
- Gluteus Maximus
- Gluteus Medius
Describe where trunk muscles are anchored
To the pelvis
Describe excessive spine motion as compensation for hip extension weakness
The trunk compensates with excessive lordosis
Describe excessive spine motion as compensation for hip abductor weakness
The trunk compensates with a side lean
Describe excessive spine motion as compensation for trunk muscles weakness
The compensation is rotaiton at the pelvis
Describe the TherEx Tx paradigm for trunk and pelvic muscles
- Flexibility - to prevent compensations
- Activation - to stabilize prior to strenghtening
- Strengthening
- Movement re-education
