Lumbar Spine Muscle Attachments

Question 1

Errector spinae

Answer 1

Origin: Iliac crest, sacrum, spine, ribs longitudinallyInsertion: Spine, ribs, occiput

Question 2

Deep layer of spine (Multifidi & Rotators)

Answer 2

Origin: Spinous & transverse processInsertion: One or a few vertebra

Question 3

Rectus abdominis

Answer 3

Origin: Xiphoid process, anterior ribsInsertion: Pubic bone

Question 4

External oblique abdominis

Answer 4

Origin: Lateral ribsInsertion: Runs inferior-medially to the rectus sheath

Question 5

Internal oblique abdominis

Answer 5

Origin: Rectus sheath, lower ribsInsertion: Runs inferior-laterally to iliac crest & thoracolumbar fascia

Question 6

Transverse abdominis

Answer 6

Origin: Rectus sheathInsertion: Thoracolumbar fascia, iliac crest, lower ribs

Question 7

Quadratus lumborum

Answer 7

Origin: 12th rib, transverse processes of lumbar spineInsertion: Posterior iliac crest

Question 8

Gluteus maximus

Answer 8

Origin: Posterior ilium, sacrumInsertion: Iliotibial band & gluteal tuberosity

Question 9

Gluteus medius

Answer 9

Origin: Gluteal lines on posterior iliumInsertion: Greater trochanter

Question 10

Biceps femoris

Answer 10

Origin: LH - Ischial tuberosity, SH - Linea asperaInsertion: Fibular head

Question 11

Semitendinosus

Answer 11

Origin: Ischial tuberosityInsertion: Anterior medial tibial condyle

Question 12

Semimembranosus

Answer 12

Origin: Ischial tuberosityInsertion: Medial tibial condyle

Question 13

Psoas

Answer 13

Origin: Anterior lumbar spineInsertion: Lesser trochanter