back muscles

Question 1

what is the extrinsic groups function

Answer 1

upper limb movement and respiration

Question 2

what is the intrinsic groups function

Answer 2

maintain posture
control movement of the vertebral column

Question 3

what muscles cause (bilateral) flexion of the spine

Answer 3

(muscles anterior to the spine)
rectus abdominis and psaos major

Question 4

what muscles cause (bilateral) extension of the spine

Answer 4

(muscles posterior to the spine)
erector spinae

Question 5

what muscles cause (unilateral) rotation

Answer 5

(muscles with oblique fibre orientation)
external oblique, internal oblique and erector spinae

Question 6

what muscles cause lateral flexion

Answer 6

erector spinae, external and internal oblique

Question 7

what movement does the anterior abdominal wall muscles cause

Answer 7

anterior flexion, lateral flexion and rotation of the trunk

Question 8

anterior abdominal wall muscle

Answer 8

rectus abdominis

Question 9

what movement do the posterior abdominal wall muscles cause

Answer 9

anterior and lateral flexion of the spine

Question 10

3 main posterior abdominal wall muscles

Answer 10

illiacus, psoas major and quadratus lumborum

Question 11

what is the intrinsic muscle of the back

Answer 11

erector spinae

Question 12

what movement does the erector spinae cause

Answer 12

extension of vertebral column (bilaterally)
lateral flexion of vertebral column (unilaterally)

Question 13

what does dehydration of intervertebral discs cause

Answer 13

reduced shock absorption

Question 14

what does osteoarthritis cause

Answer 14

pain and stiffness of joints

Question 15

what is osteoporosis

Answer 15

compression fractures altering the curvature of the spine

Question 16

what does age related weakness of back muscles cause

Answer 16

disability in older population - loss of muscle mass, strength and physical function