Back & Shoulder Muscles Flashcards Preview

Anatomy > Back & Shoulder Muscles > Flashcards

Flashcards in Back & Shoulder Muscles Deck (33):
1

Trapezius

Origin: vertebral column
Insertion: scapula & lateral clavicle
Action: elevation, depression, lateral rotation, and retraction of scapular
Innervation: spinal accessory
Perfusion: transverse cervical

2

Latissimus dorsi

Origin: vertebral column, thoracodorsal fascia, iliac crest
Insertion: anterior humerus
Action: extension, medial rotation, and adduction of arm
Innervation: thoracodorsal
Perfusion: thoracodorsal

3

Rhomboid major

Origin: vertebral column
Insertion: medial border of scapula, below spine
Action: medial rotation and retraction of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular

4

Rhomboid minor

Origin: vertebral column
Insertion: medial border of scapula, at spine
Action: medial rotation and retraction of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular

5

Levator scapulae

Origin: vertebral column
Insertion: medial border of scapula, above spine
Action: elevation of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular

6

Iliocostalis

Origin: iliac crest and vertebral column
Insertion: ribs
Action: extension and lateral flexion of vertebra
Innervation: dorsal rami
Perfusion: N/A

7

Longissimus

Origin: transverse processes
Insertion: transverse processes
Action: extension and lateral flexion of vertebra
Innervation: dorsal rami
Perfusion: N/A

8

Spinalis

Origin: spinous processes
Insertion: spinous processes
Action: extension and lateral flexion of vertebra
Innervation: dorsal rami
Perfusion: N/A

9

Deltoid

Origin: clavicle and scapula
Insertion: deltoid tuberosity of humerus
Action: abduction to 90, flexion/extension, and medial/lateral rotation of arm
Innervation: axillary nerve
Perfusion: posterior humeral circumflex artery

10

Supraspinatus

Origin: scapula
Insertion: greater tubercle of humerus
Action: abduction to 15 of arm
Innervation: suprascapular nerve
Perfusion: suprascapular artery

11

Infraspinatus

Origin: scapula
Insertion: greater tubercle of humerus
Action: lateral rotation of arm
Innervation: suprascapular nerve
Perfusion: suprascapular artery

12

Teres minor

Origin: scapula
Insertion: greater tubercle of humerus
Action: lateral rotation of arm
Innervation: axillary nerve
Perfusion: posterior humeral circumflex artery

13

Teres major

Origin: scapula
Insertion: lesser tubercle of humerus
Action: extension, medial rotation, and adduction of arm
Innervation: lower subscapular nerve
Perfusion: scapular circumflex artery

14

Pectoralis major

Origin: sternum and clavicle
Insertion: deltoid tuberosity of humerus
Action: flexion, medial rotation, and adduction of arm
Innervation: lateral and medial pectoral nerves
Perfusion: thoracoacromial artery (pectoral branch)

15

Pectoralis minor

Origin: ribs
Insertion: coracoid process
Action: protraction and depression of scapula
Innervation: medial pectoral nerve
Perfusion: thoracoacromial artery (pectoral branch)

16

Subscapularis

Origin: scapula
Insertion: lesser tuberosity of humerus
Action: medial rotation and adduction of arm
Innervation: upper and lower subscapular nerves
Perfusion: subscapular artery

17

Serratus anterior

Origin: ribs
Insertion: medial border of scapula
Action: abduction above 90, lateral rotation, and protraction of scapula
Innervation: long thoracic nerve
Perfusion: lateral thoracic artery

18

Elevation of scapula

Trapezius
Levator scapulae

19

Depression of scapula

Trapezius
Pectoralis minor

20

Protraction of scapula

Serratus anterior
Pectoralis minor

21

Retraction of scapula

Trapezius
Rhomboid major
Rhomboid minor

22

Lateral rotation of scapula

Trapezius
Serratus anterior

23

Medial rotation of scapula

Rhomboid major
Rhomboid minor

24

Flexion of arm

Deltoid
Pectoralis major
Biceps
Coracobrachialis

25

Extension of arm

Deltoid
Latissimus dorsi
Teres major
Triceps

26

Abduction

Supraspinatus
Deltoid

27

Adduction

Deltoid
Pectoralis major
Subscapularis
Latissimus dorsi
Teres major
Triceps

28

Medial rotation

Deltoid
Pectoralis major
Latissimus dorsi
Teres major
Subscapularis

29

Lateral rotation

Deltoid
Infraspinatus
Teres minor

30

What are the contents of the quadrangular space?

Axillary nerve
Posterior humeral circumflex artery & vein

31

What are the contents of the triangular space?

Scapular circumflex artery

32

What are the contents of the triangular interval?

Radial nerve
Deep brachial artery & vein

33

What are the contents of the cubital fossa?

Lateral antebrachial cutaneous nerve
Biceps tendon
Brachial artery
Median nerve