Muscle of the Vertebral Column Flashcards Preview

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Flashcards in Muscle of the Vertebral Column Deck (21):
1

What are the three muscles of the Erector Spinae group?

Iliocostalis
Longissimus
Spinalis

2

Where are the Origins of the Iliocostalis?

Ribs & Iliac Crest

3

Where are the Insertions of the Iliocostalis?

Transverse processes of cervical, thoracic & lumbar vertebrae, and ribs superior to origin

4

What joints do the Iliocostalis cross?

Vertebrae

5

What is the Action of the Iliocostalis?

Extends the spine.

6

Where are the Origins of the Longissimus?

Transverse processes of cervical, thoracic & lumbar vertebrae

7

Where is the Insertion of the Longissimus?

Transverse processes of the superior vertebrae to the origin

8

What joint does the Longissimus cross?

Vertebrae

9

What are the Actions of the Longissimus?

Extends the head and rotates it to the same side
Extends the spine

10

Where are the Origins of the Spinalis?

Spinous processes of cervical, thoracic & lumbar vertebrae

11

Where is the Insertion of the Spinalis?

Spinous processes of the superior vertebrae to the origin

12

What joint does the Spinalis cross?

Vertebrae

13

What is the Action of the Spinalis?

Extends the spine

14

Where are the Origins of the Quadratus Lumborum?

Iliac Crest & Iliolumbar Fascia

15

Where are the Insertions of the Quadratus Lumborum?

Upper four lumbar vertebrae and lower margin of the 12th rib

16

What joint does the Quadratus Lumborum cross?

Intervertebral joints of the lumbar vertebrae

17

What are the Actions of the Quadratus Lumborum?

Unilateral concentric contraction – lateral flexion of the lumbar spine. Unilateral isometric contraction – prevents lateral flexion of the lumbar spine (e.g. when carrying a heavy bag/suitcase in one hand). Bilateral eccentric contraction – assists in preventing hyperflexion of the lumbar spine

18

Where are the Origins of the Multifidus?

Sacrum and transverse processes of the vertebrae

19

Where is the Insertion of the Multifidus?

Spinous processes 2-4 vertebrae superior to the origin

20

What joint does the Multifidus cross?

Intervertebral joints of the vertebral column

21

What are the Actions of the Multiifidus?

Extends the vertebral column. Rotates the vertebral column. It is important to lumbar spine stability because it is a ‘local’ muscle, controlling the fine positioning of adjacent vertebrae