Back muscles

Question 1

what do extrinsic groups do

Answer 1

upper limb movement and respiration

Question 2

what do intrinsic groups do

Answer 2

maintain posture, control movement of vertebral columns

Question 3

where are the flexion muscles and what are they associated with

Answer 3

anterior to the spine (abdominals). associated with anterior flexion, lateral flexion and rotation of the trunk

Question 4

where are the extension muscles

Answer 4

posterior to spine

Question 5

where are the rotation muscles

Answer 5

muscles with oblique fibres on sides

Question 6

where are the lateral flexion muscles

Answer 6

back and sides

Question 7

erector spinae

Answer 7

intrinsic muscle of the back. associated with extension of vertebral column, lateral flexion of vertebral column

Question 8

what happens with age in vertebrae

Answer 8

dehydration of intervertebral discs which leads to reduced shock absorption, osteoarthritis, osteoporosis (compression fractures cause curvature of spine), weakness of back muscle