WK9+10 Lumbopelvic Muscles

Question 1

Name the O, I, I, A of the following muscle: Rectus Abdominus

Answer 1

O: crest of the pubis and pubic tubercle
I: pubis; cartilage of the 5,6,7th ribs and xiphoid
I: spinal nerves T7-12
A: flexes spine, compresses viscera

Question 2

Name the O, I, I, A of the following muscle: External Oblique

Answer 2

O: sternum, ext and inf borders of ribs 5-12
I: linea alba, iliac crest
I: lower intercostal nerve, iliohypogastric, ilioinguinal nerve
A: compresses Abd, lateral trunk flexion

Question 3

Name the O, I, I, A of the following muscle: Internal Oblique

Answer 3

O: inguinal lig, iliac crest, TL fascia
I: pubis, linea alba, ribs (9,10-12)
I: T7-T12,iliohypogastric, ilioinguinal nerve
A: compresses Abd, lateral trunk flexion

Question 4

Name the O, I, I, A of the following muscle: Transversus Abd

Answer 4

O: inguinal lig, iliac crest, TL fascia
I: pubis, linea alba
I: T9-L1,iliohypogastric, ilioinguinal nerve
O: Compresses viscera

Question 5

Name the O, I, I, A of the following muscle: Psoas Major

Answer 5

O: bodies of T12-L5
I: lesser trochanter of femur w/ iliacus
I: branches of L1-4
A: thigh flexion at hip, trunk flexion

Question 6

Name the O, I, I, A of the following muscle: Quadratus Lumborum

Answer 6

O: iliolumbar lig and iliac crest
I: lower border of last rib and trans processes of L1-4
I: spinal nerves T12-L1-2
A: raises pelvis, lateral flexion of spine, stabilizer

Question 7

Name the O, I, I, A of the following muscle: Latissimus Dorsi

Answer 7

O: spinous processes of T7-L5, TL fascia, iliac crest
I: intertubercular groove of humerus
I: thoracodorsal nerve
A: Ext, add, medial arm rotation

Question 8

Name the O, I, I, A of the following muscle: Iliocostalis

Answer 8

O: iliac crst and lateral portion of common erector spinae tendon
I: inferior borders of ribs 6-7
I: dorsal rami of spinal nerves
A: ext and lateral flexion

Question 9

Name the O, I, I, A of the following muscle: Longissmus

Answer 9

O: whole length of posterior surfaces of trans processes
I: tips of trans processes, lower ribs 9-10 b/w tubercles, mastoid
I: dorsal primary rami of thoracic and lumbar nerves
A: ext and lateral flexion

Question 10

Name the O, I, I, A of the following muscle: Spinalis

Answer 10

O: spinous processes of T11-L2
I: Spinous processes of T Spine
I: dorsal rami of upper cervical nerves
A: ext and lateral flexion

Question 11

Name the O, I, I, A of the following muscle: Semispinalis

Answer 11

O: trans processes of T6-12
I: spinous processes of C6- T4
I: dorsal rami of spinal nerves
A: ext of spine

Question 12

Name the O, I, I, A of the following muscle: Multifidus

Answer 12

O: sacrum, post and superior iliac spine
I: spinous processes of vertebrae 2-4 up
I : posterior branches
A: stabilization, ext, contralateral rotation

Question 13

Name the O, I, I, A of the following muscle:Rotatores

Answer 13

O: trans processes of each thoracic vertebrae
I: spinous processes above
I: posterior branches
A: rotation of T-Spine

Question 14

Name the O, I, I, A of the following muscle: Iliacus

Answer 14

O: illiac fossa
I: blends with psoas major
I: femoral nerve
A: flex of thigh at hip

Question 15

Name the O, I, I, A of the following muscle: Coccygeus

Answer 15

O: spine of ischium, sacrospinous lig
I: lateral margin of the coccyx and sacrum
I: pudendal nerve
A: draws coccyx forward

Question 16

Name the O, I, I, A of the following muscle: Levator Ani

Answer 16

O: body of pubis, ischial spine
I: perineal body, coccyx
I: nerve to levator ani, inf anal nerve, coccygeal plexus
A: pelvic diaphragm

Question 17

Name the O, I, I, A of the following muscle: Piriformis

Answer 17

O: front of lower sacrum L1-4
I: upper border of greater trochanter
I: spinal nerves L5-S2
A: lateral rotation of thigh at hip, stabilization

Question 18

Name the O, I, I, A of the following muscle:Obturator Internus

Answer 18

O: inner surface of obturator foramen
I: medial surface of greater troch
I: nerve to obturator internus
A: rotates hip joint, holds femoral head in acetabulum