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46 Cards in this Set

  • Front
  • Back
Name the muscles of the arm
- deltoid

- supraspinatus

- infraspinatus

- teres major

- teres minor

- subscapularis

- biceps brachii

- brachialis

- coracobrachialis

- triceps brachii

- anconeus
Deltoid
O & I
O:
1) lateral 1/3 of clavicle
2) acromion
3) spine of scapula

I: deltoid tuberosity of humerus
Deltoid
Innervation
axillary
Deltoid
Vasculature
posterior humeral circumflex
Deltoid
Main Action
anterior: flex and medially rotate arm

middle: abduct arm

posterior: extend and laterally rotate arm
What muscles make up the rotator cuff?
- supraspinatus

- infraspinatus

- teres minor

- subscapularis
Supraspinatus
O & I
O: supraspinatus fossa of scapula

I: superior greater tuberosity of humerus
Supraspinatus
Innervation
suprascapular
Supraspinatus
Vasculature
suprascapular
Supraspinatus
Main Action
initiates abduction of arm (first 30°)

assists the deltoid with arm abduction
Infraspinatus
O & I
O: infraspinatus fossa of scapula

I: middle greater tuberosity of humerus
Infraspinatus
Innervation
suprascapular
Infraspinatus
Vasculature
suprascapular

scapular circumflex
Infraspinatus
Main Action
laterally rotates arm

helps to hold humeral head in glenoid cavity
Teres major
O & I
O: dorsal inferior angle of scapula

I: medial lip of intertubercular groove of humerus
Teres major
Innervation
lower subscapular
Teres major
Vasculature
thoracodorsal
Teres major
Main Action
adducts arm

medially rotates arm
Teres minor
O & I
O: superior lateral border of scapular

I: inferior greater tuberosity of humerus
Teres minor
Innervation
axillary
Teres minor
Vasculature
scapular circumflex
Teres minor
Main Action
laterally rotates arm

helps to hold humeral head in glenoid cavity
Subscapularis
O & I
O: subscapular fossa

I: lesser tuberosity of humerus
Subscapularis
Innervation
upper and lower subscapular
Subscapularis
Vasculature
subscapular
Subscapularis
Main Action
medially rotates arm

adducts arm

helps to hold humeral head in glenoid cavity
Biceps brachii
O & I
O:
1) short head: tip of coracoid process
2) long head: supraglenoid tubercle

I:
1) radial tuberosity
2) fascia of forearm (via bicipital aponeurosis)
Biceps brachii
Innervation
musculocutaneous
Biceps brachii
Vasculature
brachial
Biceps brachii
Main Action
flexes elbow

supinates forearm
Brachialis
O & I
O: distal 1/2 of anterior humerus

I:
1) coronoid process
2) ulnar tuberosity
Brachialis
Innervation
musculocutaneous
Brachialis
Vasculature
brachial and radial recurrent
Brachialis
Main Action
flexes elbow
Coracobrachialis
O & I
O: tip of coracoid process

I: middle 1/3 of medial humerus
Coracobrachialis
Innervation
musculocutaneous
Coracobrachialis
Vasculature
brachial
Coracobrachialis
Main Action
flexes arm

adducts arm
Triceps brachii
O & I
O:
1) long head: infragelnoid tubercle
2) medial head: posterior humerus
3) lateral head: posterior humerus

I:
1) olecranon
2) fascia of forearm
Triceps brachii
Innervation
radial
Triceps brachii
Vasculature
brachial

superior ulnar collateral

profunda brachii
Triceps brachii
Main Action
extends elbow
Anconeus
O & I
O: lateral epicondyle of humerus

I:
1) lateral olecranon
2) superior posterior ulna
Anconeus
Innervation
radial
Anconeus
Vasculature
middle collateral from profunda brachii
Anconeus
Main Action
assists triceps in extending elbow (and elbow flexion)