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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 |
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What muscles make up the rotator cuff?
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- supraspinatus
- infraspinatus - teres minor - subscapularis |
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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 |
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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 |
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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
|
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Teres major
Main Action |
adducts arm
medially rotates arm |
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Teres minor
O & I |
O: superior lateral border of scapular
I: inferior greater tuberosity of humerus |
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Teres minor
Innervation |
axillary
|
|
Teres minor
Vasculature |
scapular circumflex
|
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Teres minor
Main Action |
laterally rotates arm
helps to hold humeral head in glenoid cavity |
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Subscapularis
O & I |
O: subscapular fossa
I: lesser tuberosity of humerus |
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Subscapularis
Innervation |
upper and lower subscapular
|
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Subscapularis
Vasculature |
subscapular
|
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Subscapularis
Main Action |
medially rotates arm
adducts arm helps to hold humeral head in glenoid cavity |
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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 |
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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
|
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Brachialis
Main Action |
flexes elbow
|
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Coracobrachialis
O & I |
O: tip of coracoid process
I: middle 1/3 of medial humerus |
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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
|
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Triceps brachii
Vasculature |
brachial
superior ulnar collateral profunda brachii |
|
Triceps brachii
Main Action |
extends elbow
|
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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)
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