PHYP701 Muscles - Lumbar Spine and Pelvis

What 6 muscles are used in Lumbar Flexion

External Abdominal Oblique

Internal Abdominal Oblique

Psoas Major

Psoas Minor

Rectus Abdominis

Transversus Abdominis

What 6 muscles are used in Lumbar Extension

Iliocostalis (ES)

Longissimus (ES)

Spinalis (ES)

Interspinales

Multifidus

Semispinalis

What 11 muscles are used in Lumbar Side Flexion

External Abdominal Oblique

Internal Abdominal Oblique

Psoas Major

Psoas Minor

Transversus Abdominus

Iliocostalis (ES)

Longissimus (ES)

Spinalis (ES)

Multifidus

Quadratus Lumborum

Intertransversarii

What 3 muscles are used in Lumbar Rotation

Rotatores

External Abdominal Oblique

Internal Abdominal Oblique

What is the Action, Origin, Insertion and Innervation of: External Abdominal Oblique

Action: Lumbar Flexion

Origin: Lower 8 RIbs

Insertion: Linea alba, pubic crest & tubercle, ASIS, & anterior half of iliac crest

Innervation: Intercostal nerves 7-11, subcostal, iliohypogastric and ilioinguinal nerves

What is the Action, Origin, Insertion and Innervation of: Internal Abdominal Oblique

Action: Lumbar Flexion

Origin: Thoracolumbar fascia, anterior 2/3 of the iliac crest, lateral 2/3 of the inguinal ligament

Insertion: Lower 3 or 4 ribs, linea alba, pubic crest

Innervation: Intercostal nerves 7-11, subcostal, iliohypogastric and ilioinguinal nerves

What is the Action, Origin, Insertion and Innervation of: Psoas Major

Action: Lumbar Flexion

Origin: Bodies and transverse processes of lumbar vertebrae

Insertion: lesser trochanter of femur via ilipsoas tendon

Innervation: branches of the ventral primary rami of spinal nerves L2-L4

What is the Action, Origin, Insertion and Innervation of: Psoas Minor

Action: Lumbar Flexion

Origin: Bodies of T12 and L1 vertebrae

Insertion: Iliopubic eminence at the line of junction of the ilium and superior pubic ramus

Innervation: Branches of the ventral primary rams of spinal nerves L1-L2

What is the Action, Origin, Insertion and Innervation of: Rectus Abdominus

Action: Lumbar Flexion

Origin: Pubis and the pubic symphysis

Insertion: Xyphoid process of the sternum and costal cartilages 5-7

Innervation: Intercostal nerves 7-11 and subcostal nerve

What is the Action, Origin, Insertion and Innervation of: Transersus Abdominus

Action: Lumbar Flexion

Origin: Lateral part of inguinal ligament,iliac crest, thoracolumbar fascia, cartilage of lower 6 ribs

Insertion: Abdominal aponeurosis to linea aspera

Innervation: Intercostal nerves 7-12, subcostal, iliohypogastric and ilioinguinal nerves

What is the Action, Origin, Insertion and Innervation of: Iliocostalis (ES)

Action: Lumbar Extension

Origin: Iliac crest and sacrum

Insertion: Angles of the ribs

Innervation: Dorsal primary rami of spinal nerves C4-S5

What is the Action, Origin, Insertion and Innervation of: Longissimus (ES)

Action: Lumbar Extension

Origin: Transverse process at inferior vertebral levels

Insertion: Transverse process at superior vertebral levels and mastoid process

Innervation: Dorsi primary rami of spinal nerves C1-S1

What is the Action, Origin, Insertion and Innervation of: Spinalis (ES)

Action: Lumbar Extension

Origin: Spinous processes at inferior vertebral levels

Insertion: Spinous processes at superior vertebral levels and base of the skull

Innervation: Dorsal primary rami of spinal nerves C2-L3

What is the Action, Origin, Insertion and Innervation of: Interspinales

Action: Lumbar Extension

Origin: Upper border of spinous processes

Insertion: Lower border of spinous process above

Innervation: Dorsal primary rami of spinal nerves C1-L5

What is the Action, Origin, Insertion and Innervation of: Multifidus

Action: Lumbar Extension

Origin: Sacrum, transverse processes of C3-L5

Insertion: Spinous processes 2-4 vertebreal levels superior to their origins

Innervation: Dorsal primary rami of spinal nerves C1-L5

What is the Action, Origin, Insertion and Innervation of: Semispinalis

Action: Lumbar Extension

Origin: Transverse processes of C7-T12

Insertion: Capitis: back of skull between nuchal lines; cervicis and thoracis: spines 4-6 vertebrae above origin

Innervation: Dorsal primary rami of spinal nerves C1-T12

What is the Action, Origin, Insertion and Innervation of: Quadratus Lumborum

Action: Lumbar Lateral Flexion

Origin: Posterior aspect of iliac crest and iliolumbar ligament

Insertion: Transverse processes of lumbar vertebrae 1-4 and the 12th rib

Innervation: Subcostal nerve and ventral primary rami of spinal nerve L1-L4

What is the Action, Origin, Insertion and Innervation of: Intertransversarii

Action: Lumbar Lateral Flexion

Origin: Upper border of transverse process

Insertion: Lower border of transverse process above

Innervation: Dorsal primary rami of spinal nerves C1-L5

What is the Action, Origin, Insertion and Innervation of: Rotatores

Action: Lumbar Rotation

Origin: Transverse processes

Insertion: Long rotatores: spines 2 vertebrae above origin; short rotatores: spines 1 vertebrae above origin

Innervation: Dorsal primary rami of spinal nerves C1-L5