muscles origin,insertion,action

Question 1

rhomboid major description

Answer 1

-the larger of the 2 rhomboids
- is a skeletal muscle which connects the scapular to the vertebrae of the spinal column
-it sits deep underneath the trapezius muscle
-it runs inferolaterally (below and to one side)

Question 2

rhomboid major origin

Answer 2

-the spinous processes of vertebrae t2 t3 t4 and t5
-ie t2 to t5

Question 3

rhomboid major insertion

Answer 3

inserts into the medial (inner) border of the scapular (shoulder blade) below the spine of scapular

Question 4

rhomboid major action

Answer 4

-it supports to position of the scapular (shoulder blade) holding it onto the ribcage
-moves the scapular (inferior angle) backwards and inwards towards the spine

Question 5

rhomboid minor description

Answer 5

-smaller of the 2 rhomboids
-run inferlaterally

Question 6

rhomboid minor origins

Answer 6

nuchal ligament
and spinous processors c7 to t1
7th cervical to 1st thoratic

Question 7

rhomboid minor insertion

Answer 7

inserts into the medial (toward spine side) or the spine of scapular

Question 8

rhomboid minor action

Answer 8

same as rhomboid major
-supports the positioning of the scapular holding it to the rib cage
-moves the scapular backwards and upwards

Question 9

trapezius muscles

Answer 9

-flat triangular muscle of the upper back shoulders and neck
-3 parts upper middle and lower with different muscle fibre directions

Question 10

traps origins

Answer 10

-it has mutiple because its so big
-occipital bone
-logamentum nuchae
-spinous processors t1 through to t12

Question 11

traps insersion

Answer 11

-the lateral (outer) third of the clavical
as well as the acromion (point that meets the clavical) and spine of scapular

Question 12

traps action

Answer 12

-rotation and retraction of the scapular
-elevation and depression of the scapular
-extends the neck
-stabilises the shoulder

Question 13

erector spinae

Answer 13

not just 1 muscle but a group of muscles and tendons running the whole length of the spine on both sides
-from sacrum to skull
-goes through all regions, cervical, thoratic and lumbar
1.iliocostal
2.longissimum
3.spinalis

Question 14

spinalis

Answer 14

-1 of 3 parts of the erector spinae
-runs entire length of vertebral column
-smallest and most medial (inner) to the spine

Question 15

spinalis origins

Answer 15

spinous processors of the FIRST 2 LUMBAR and the LAST 2 THORATIC

Question 16

spinalis insertion

Answer 16

the upper thoratic vertebrae anywhere from t4 to t8

Question 17

spinalis action

Answer 17

extends the head

Question 18

longissimum

Answer 18

-1 of three parts of the erector spinae
-the longissimus muscles run between the iliocostal and spinalis
-they extend laterally and flex the vertebral column

Question 19

longissimum origin

Answer 19

many and varied

Question 20

longissimum insertions

Answer 20

many and varied

Question 21

longissimus action

Answer 21

-extends and laterally flexes the spine
-aids in compression of the ribs
-extends the head to bend and turn unilaterally

Question 22

iliocostalis

Answer 22

-1 of 3 parts of the erector spinae
-most lateral to the spine (outer)

Question 23

iliocostalis origin

Answer 23

many and varied

Question 24

iliocostalils insertion

Answer 24

many and varied

Question 25

iliocostalis action

Answer 25

-extends and laterally fleses the vertebral column
-aids in rotation of the spine

Question 26

levetor scapular

Answer 26

situated at the back side of the neck and acts on the pectorial girdle

Question 27

levator scapular origin

Answer 27

transverse processors of c1 - c4

Question 28

levator scapular insertion

Answer 28

the superior (upper part) of the medial (inner) border of the scapular

Question 29

levator scapular action

Answer 29

-elevates the scapular shrugging
-tilts the head side to side ear to shoulder

Question 30

supraspinatus

Answer 30

-part of the rotator cuff muscles
-located at the back of the shoulder

Question 31

supraspinatus origin

Answer 31

all of the supraspinatus fossa which is the concave surface at the top of the scapular

Question 32

supraspinatus insertion

Answer 32

insertion into the greater tubercal of the hummerous (long arm bone)

Question 33

supraspinatus action

Answer 33

assists the deltoid muscle in abducting or lifting the arm