OINAs- Superficial Back

Question 1

upper trapezius OINA

Answer 1

O: occipital bone, spinous processes C1-C7

I: lateral 1/3 of clavicle

N: CN XI, spinal accessory + ventral rami C3-C4

A:
insertion fixed- B, neck extension, U, neck lateral flexion (same side), neck rotation (opposite side)
origin fixed- elevation + upward rotation of the scapula

Question 2

upper trapezius ORIGIN

Answer 2

occipital bone, spinous processes C1-C7

Question 3

upper trapezius INSERTION

Answer 3

lateral 1/3 of clavicle

Question 4

upper trapezius NERVE SUPPLY

Answer 4

CN XI, spinal accessory + ventral rami C3-C4

(same as middle + lower trapezius)

Question 5

upper trapezius ACTION

Answer 5

insertion fixed- B, neck extension, U, neck lateral flexion (same side), neck rotation (opposite side)

origin fixed- elevation + upward rotation of the scapula

Question 6

middle trapezius OINA

Answer 6

O: spinous processes T1-T4

I: acromion + spine of scapula

N: CN XI, spinal accessory + ventral rami C3-C4

A: adduction of the scapula

Question 7

middle trapezius INSERTION

Answer 7

acromion + spine of scapula

Question 7

middle trapezius ORIGIN

Answer 7

spinous processes T1-T4

Question 8

middle trapezius NERVE SUPPLY

Answer 8

CN XI (spinal accessory nerve) + ventral rami C3-C4

(same as upper + lower trapezius)

Question 9

middle trapezius ACTION

Answer 9

adduction of the scapula

Question 10

lower trapezius OINA

Answer 10

O: spinous processes T5-T12

I: spine of the scapula

N: CN XI, spinal accessory + ventral rami C3-C4

A: depression + upward rotation of the scapula

Question 11

lower trapezius ORIGIN

Answer 11

spinous processes T5-T12

Question 12

lower trapezius INSERTION

Answer 12

spine of the scapula

Question 13

lower trapezius NERVE SUPPLY

Answer 13

CN XI, spinal accessory + ventral rami C3-C4

(same as upper + middle trapezius)

Question 14

lower trapezius ACTION

Answer 14

depression + upward rotation of the scapula

Question 15

rhomboid minor OINA

Answer 15

O: spinous processes of C7-T1

I: medial border of the scapula above the scapula spine

N: dorsal scapular nerve

A: adduction, elevation, + downward rotation of the scapula

Question 16

rhomboid minor ORIGIN

Answer 16

spinous processes of C7-T1

Question 17

rhomboid minor INSERTION

Answer 17

medial border of the scapula ABOVE the scapula spine

(rhomboid major insertion is BELOW)

Question 18

rhomboid minor NERVE SUPPLY

Answer 18

dorsal scapular nerve

(same as rhomboid major)

Question 19

rhomboid minor ACTION

Answer 19

adduction, elevation, + downward rotation of the scapula

(same as rhomboid major)

Question 20

rhomboid major OINA

Answer 20

O: spinous processes of T1-T4

I: medial border of the scapula below the scapula spine

N: dorsal scapular nerve

A: adduction, elevation, + downward rotation of the scapula

Question 21

rhomboid major ORIGIN

Answer 21

spinous processes of T1-T4

Question 22

rhomboid major INSERTION

Answer 22

medial border of the scapula BELOW the scapula spine

(rhomboid minor insertion is ABOVE)

Question 23

rhomboid major NERVE SUPPLY

Answer 23

dorsal scapular nerve

(same as rhomboid minor)

Question 24

rhomboid major ACTION

Answer 24

adduction, elevation, + downward rotation of the scapula | (same as rhomboid minor)

Question 25

levator scapulae OINA

Answer 25

O: transverse processes C1-C4 I: superior angle of the scapula N: dorsal scapular nerve + branches from C3-5 A: insertion fixed- B, neck extension; U, neck lateral flexion + rotation (same side) origin fixed- elevation + downward rotation of the scapula

Question 26

levator scapulae ORIGIN

Answer 26

transverse processes C1-C4

Question 27

levator scapulae INSERTION

Answer 27

superior angle of the scapula

Question 28

levator scapulae NERVE SUPPLY

Answer 28

dorsal scapular nerve + branches from C3-5

Question 29

levator scapulae ACTION

Answer 29

insertion fixed- B, neck extension; U, neck lateral flexion + rotation (same side) origin fixed- elevation + downward rotation of the scapula

Question 30

latissimus dorsi OINA

Answer 30

O: spinous processes of T7-T12; thoracolumbar fascia; ribs 9-12; iliac crest I: intertubercular groove of the humerus N: thoracodorsal nerve A: origin fixed- extension, adduction, internal rotation of the humerus insertion fixed- elevation of the pelvis

Question 31

latissimus dorsi ORIGIN

Answer 31

-spinous processes of T7-T12 -thoracolumbar fascia -ribs 9-12 -iliac crest

Question 32

latissimus dorsi INSERTION

Answer 32

intertubercular groove of the humerus

Question 33

latissimus dorsi NERVE SUPPLY

Answer 33

thoracodorsal nerve

Question 34

latissimus dorsi ACTION

Answer 34

origin fixed- extension, adduction, internal rotation of the humerus insertion fixed- elevation of the pelvis

Question 35

supraspinatus OINA

Answer 35

O: supraspinous fossa I: superior facet on the greater tubercle N: suprascapular nerve A: abduction of the humerus, stabilizes humeral head in the glenoid cavity

Question 36

supraspinatus ORIGIN

Answer 36

supraspinous fossa

Question 37

supraspinatus INSERTION

Answer 37

superior facet on the greater tubercle

Question 38

supraspinatus NERVE SUPPLY

Answer 38

suprascapular nerve | (same as infraspinatus)

Question 39

supraspinatus ACTION

Answer 39

-abduction of the humerus -stabilizes humeral head in the glenoid cavity

Question 40

infraspinatus OINA

Answer 40

O: infraspinous fossa I: middle facet on the greater tubercle N: suprascapular nerve A: external rotation of the humerus, stabilizes humeral head in the glenoid cavity

Question 41

infraspinatus ORIGIN

Answer 41

infraspinous fossa

Question 42

infraspinatus INSERTION

Answer 42

middle facet on the greater tubercle

Question 43

infraspinatus NERVE SUPPLY

Answer 43

suprascapular nerve | (same as supraspinatus)

Question 44

infraspinatus ACTION

Answer 44

-external rotation of the humerus -stabilizes humeral head in the glenoid cavity

Question 45

teres minor OINA

Answer 45

O: superior lateral border of the scapula I: lower facet on the greater tubercle N: axillary nerve A: external rotation of the humerus, stabilizes humeral head in glenoid cavity

Question 46

teres minor ORIGIN

Answer 46

superior lateral border of the scapula

Question 47

teres minor INSERTION

Answer 47

lower facet on the greater tubercle

Question 48

teres minor NERVE SUPPLY

Answer 48

axillary nerve

Question 49

teres minor ACTION

Answer 49

-external rotation of the humerus -stabilizes humeral head in glenoid cavity

Question 50

teres major OINA

Answer 50

O: inferior angle of the scapula I: lesser tubercle of the humerus N: lower subscapular nerve A: extension, adduction, internal rotation of the humerus

Question 51

teres major ORIGIN

Answer 51

inferior angle of the scapula

Question 52

teres major INSERTION

Answer 52

lesser tubercle of the humerus

Question 53

teres major NERVE SUPPLY

Answer 53

lower subscapular nerve

Question 54

teres major ACTION

Answer 54

extension, adduction, internal rotation of the humerus (same as the lats)