Extensors Of The Vertebral Column - Chp 10

Question 1

What are the three (3) Extensors of the vertebral column?

Answer 1

Erector spinae mm.
1. iliocostalis (lateral)
2. longissimus
3. spinalis (most medial)

Question 2

Erector spinae mm. - O =

Answer 2

iliac crest, sacrum, spinous processes

Question 3

Erector spinae mm. - I =

Answer 3

transverse processes, spinous processes & ribs, other spots

Question 4

Erector spinae mm. - A =

Answer 4

back extension, posture, lateral bending (Note: bending to the left or right

Question 5

What do the Erector mm. do?

Answer 5

Note: hold the back erect