Trunk and Pelvis Muscle Review

Question 1

Muscle: Main function is back extension

Answer 1

Erector Spinae

Question 2

Muscle: Provides power when lifting and compresses the spine

Answer 2

Erector Spinae

Question 3

Muscle: Deep fibers prevent anterior translation during flexion

Answer 3

Erector Spinae

Question 4

Muscle: Can cause an anterior tilt of the pelvis due to its connection to the thoracolumbar fascia

Answer 4

Erector Spinae

Question 5

Muscle: Main function is proprioception and feedback

Answer 5

Interspinalis

Intertransversaris

Question 6

Muscle: Deep segmental muscles

Answer 6

Interspinalis

Intertransversaris

Question 7

Muscle: Small and close to the axis of motion making them unable to produce power

Answer 7

Interspinalis

Intertransversaris

Question 8

Muscle: “Fine tune” segmental motion

Answer 8

Interspinalis

Intertransversaris

Question 9

Muscle: Primary function is side flexion

Answer 9

Quadratus Lumborum

Question 10

Muscle: Function to stabilize sustained posture and heavy lifitng and is important in lumbopelvic motion

Answer 10

Quadratus Lumborum

Question 11

Muscle: Provides a stable base for the diaphragm

Answer 11

Quadratus Lumborum

Question 12

Muscle: Controls flexion and anterior shear forces

Answer 12

Multifidus

Question 13

Muscle: Important for segmental stability by preventing anterior shearing

Answer 13

Multifidus

Question 14

Muscle: Christmas tree shaped and largest (in diameter) in the lumbosacral area

Answer 14

Multifidus

Question 15

Muscle: Primary hip/trunk flexor

Answer 15

Iliopsoas

Question 16

Muscle: Deepest abdominal muscle that acts like a corset

Answer 16

Transverse Abdominis

Question 17

Muscle: Important for stability and acts in a anticipatory manner (stabilizing prior to limb and trunk movement)

Answer 17

Transverse Abdominis

Question 18

Muscle: Prevents anterior shearing due to its attachment to the thoracolumbar fascia

Answer 18

Transverse Abdominis

Question 19

Muscle: Movement of proximal attachment results in trunk rotation

Answer 19

Internal and External Obliques

Question 20

Muscle: Movement of bilateral distal attachment results in pelvic tilt

Answer 20

Internal and External Obliques

Question 21

Muscle: Movement of unilateral distal attachment results in rotaiton

Answer 21

Internal and External Obliques

Question 22

Muscle: Movement of bilateral distal attachment results in ANTERIOR pelvic tilt

Answer 22

Internal Obliques

Question 23

Muscle: Movement of bilateral distal attachment results in POSTERIOR pelvic tilt

Answer 23

External Obliques

Question 24

Describe which oblique is typically dominant and it’s implications

Answer 24

Interal Oblique

Why many people have a sligth anterior tilt to their pelvic posture

Question 25

Muscle: Main function is the provide stability of the lumbopelvic region and to prevent anterior shearing

Answer 25

Thoracolumbar Facsia

Question 26

Describe how the thoracolumbar fascia prevents anterior shearing

Answer 26

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

Question 27

Muscle: Passively attached form spinous processes from T12 down

Answer 27

Thoracolumbar Fascia

Question 28

Type of Muscle: provides mobility

Answer 28

Global Muscle

Question 29

Type of Muscle: Provides stability

Answer 29

Local Muscle

Question 30

Type of Muscle: Response to pain with overactivation

Answer 30

Global Muscle

Question 31

Type of Muscle: Responses to pain with inhibition

Answer 31

Local Muscle

Question 32

Type of Muscle: Rectus Abdominis Internal/External Oblique Erector Spinae Lateral Quadratus Lumborum Thoracic Iliocostalis

Answer 32

Global Muscle

Question 33

Type of Muscle: Produce power Transmit load Provide overall trunk stability

Answer 33

Global Muscles

Question 34

Type of Muscle: Multifidus Diaphragm Pelvic Floor Transverse Abdominis Medial quadratus lumborum Lumbar Iliocostalis Longissimus

Answer 34

Local Muscles

Question 35

Type of Muscle: Provde segmental stability

Answer 35

Local Muscles

Question 36

Describe how TA can be either a global or local muscles

Answer 36

If defined by its attachment = local function = global

Question 37

Muscle: Important when returning from trunk flexion

Answer 37

Gluteus maximus

Question 38

Muscle: Important for pelvic stabilization during weight bearing

Answer 38

Gluteus Medius

Question 39

Muscle: Funtions in hip extension, ER, ABD, and trunk motion

Answer 39

Gluteus Maximus

Question 40

Muscle: Functions in hip ABD, IR, ER, and trunk stabilization

Answer 40

Gluteus Medius

Question 41

5 Trunk Stabilizers

Answer 41

1. Abdominals 2. Obliques 3. Paraspinals 4. TA 5. Multifidus

Question 42

2 Pelvic Stabilizers

Answer 42

1. Gluteus Maximus 2. Gluteus Medius

Question 43

Describe where trunk muscles are anchored

Answer 43

To the pelvis

Question 44

Describe excessive spine motion as compensation for hip extension weakness

Answer 44

The trunk compensates with excessive lordosis

Question 45

Describe excessive spine motion as compensation for hip abductor weakness

Answer 45

The trunk compensates with a side lean

Question 46

Describe excessive spine motion as compensation for trunk muscles weakness

Answer 46

The compensation is rotaiton at the pelvis

Question 47

Describe the TherEx Tx paradigm for trunk and pelvic muscles

Answer 47

1. Flexibility - to prevent compensations 2. Activation - to stabilize prior to strenghtening 3. Strengthening 4. Movement re-education