Muscles of the Shoulder/Scapula

Question 1

Rhomboid Minor (Origin & Insertion)

Answer 1

O: Vertebral spines of C7-T1
I: Sup vertebral border of scapula

Question 2

Rhomboid Minor (Actions)

Answer 2

Elevates, retracts, & rotates scapula down

Question 3

Rhomboid Minor (Nerve & Artery)

Answer 3

N: Dorsal scapular N
A: Dorsal scapular A

Question 4

Trapezius (Origin & Insertion)

Answer 4

O: Occipital region & spines of C2-T12
I: Scapular spine, acromion, & lat clavicle

Question 5

Trapezius (Actions)

Answer 5

Elevates, depresses & retracts scapula
Rotates scapula up
I/O extends head/neck

Question 6

Trapezius (Nerve & Artery)

Answer 6

N: Spinal accessory N XI
A: Transverse cervical A

Question 7

Levator Scapulae (Origin & Insertion)

Answer 7

O: Transverse processes of C1-C4
I: Sup angle of scapula

Question 8

Levator Scapulae (Actions)

Answer 8

Elevates scapula
Rotates scapula down
I/O lat flexes neck

Question 9

Levator Scapulae (Nerve & Artery)

Answer 9

N: Dorsal scapular N
A: Dorsal scapular A

Question 10

Rhomboid Major (Origin & Insertion)

Answer 10

O: Vertebral spines of T2-T5
I: Vertebral border of scapula

Question 11

Rhomboid Major (Actions)

Answer 11

Elevates, retracts, & rotates scapula down

Question 12

Rhomboid Major (Nerve & Artery)

Answer 12

N: Dorsal scapular N
A: Dorsal Scapular A

Question 13

Latissimus Dorsi (Origin & Insertion)

Answer 13

O: Spines of T7-L5, Sup sacrum, & iliac crest
I: Scapular inf angle & lateral lip of humeral lesser tubercle

Question 14

Latissimus Dorsi (Actions)

Answer 14

A prime mover for extending & adducting shoulder
Int rotates shoulder
Rotates scapula down
Depresses & retracts scapula
I/O compresses ribcage

Question 15

Latissimus Dorsi (Nerve & Artery)

Answer 15

N: Thoracodorsal N
A: Thoracodorsal A

Question 16

Serratus Anterior (Origin & Insertion)

Answer 16

O: Anterolateral ribs 1-8
I: Ant vertebral border of the scapula

Question 17

Serratus Anterior (Actions)

Answer 17

Prime mover for protracting scapula
Depresses scapula
Rotates scapula up
I/O expands ribcage

Question 18

Serratus Anterior (Nerve & Artery)

Answer 18

N: Long thoracic N
A: Lat thoracic A

Question 19

Subscapularis (Origin & Insertion)

Answer 19

O: Subscapular fossa
I: Lesser tubercle of ant humerus

Question 20

Subscapularis (Actions)

Answer 20

Prime mover for internally rotating shoulder

Adducts & flexes shoulder

Question 21

Subscapularis (Nerve & Artery)

Answer 21

N: Upper & lower subscapular Nn
A: Subscapular A

Question 22

Supraspinatus (Origin & Insertion)

Answer 22

O: Supraspinous fossa of scapula
I: Sup greater tubercle of humerus

Question 23

Supraspinatus (Actions)

Answer 23

Abducts shoulder

Question 24

Supraspinatus (Nerve & Artery)

Answer 24

N: Suprascapular N
A: Suprascapular A

Question 25

Infraspinatus (Origin & Insertion)

Answer 25

O: Infraspinous fossa of scapula I: Post greater tubercle of humerus

Question 26

Infraspinatus (Actions)

Answer 26

Prime mover for externally rotating shoulder | Helps adduct & extend shoulder

Question 27

Infraspinatus (Nerve & Artery)

Answer 27

N: Suprascapular N A: Suprascapular A

Question 28

Teres Minor (Origin & Insertion)

Answer 28

O: Axillary border of the scapula I: Post greater tubercle of the humerus

Question 29

Teres Minor (Actions)

Answer 29

Prime mover for externally rotating shoulder | Helps adduct & extend shoulder

Question 30

Teres Minor (Nerve & Artery)

Answer 30

N: Axillary N A: Circumflex scapular A

Question 31

Teres Major (Origin & Insertion)

Answer 31

O: Inf angle of scapula I: Med lip of bicipital sulcus

Question 32

Teres Major (Actions)

Answer 32

Adducts, extends, & internally rotates shoulder

Question 33

Teres Major (Nerve & Artery)

Answer 33

N: Lower subscapular N A: Circumflex scapular A

Question 34

Deltoideus (Origin & Insertion)

Answer 34

O: Scapular spine, acromion, & lat clavicle I: deltoid tuberosity of humerus

Question 35

Deltoideus- Anterior Head (Actions)

Answer 35

Internally rotates, flexes, & abducts shoulder

Question 36

Deltoideus- Superior Head (Actions)

Answer 36

Abducts shoulder

Question 37

Deltoideus- Posterior Head (Actions)

Answer 37

Externally rotates, extends, & abducts shoulder

Question 38

Deltoideus (Nerve & Insertions)

Answer 38

N: Axillary N A: Ant & Post humeral circumflex Aa