Muscles of the Shoulder & Upper Arm Flashcards
Deltoids (Anterior)
O: Clavicle - lateral 1/3
I: Deltoid Tuberosity
A: Flexion, medial rotation, and horizontal ADduction @ GH joint
*All 3 muscles of Deltoid will ABduct the arm @ the GH joint
N: Axillary Nerve
B: Circumflex Humeral
Deltoids (Middle)
O: Acromion I: Deltoid Tuberosity A: ABduction of the arm @ GH joint N: Axillary Nerve B: Circumflex Humeral
Deltoids (Posterior)
O: Spine of Scapula I: Deltoid Tuberosity A: Extension, lateral rotation, and horizontal ABduction @ GH joint N: Axillary Nerve B: Circumflex Humeral
Rotator Cuffs: Supraspinatus
O: Supraspinous fossa of scapula I: Greater tubercle A: ABduction of arm @ GH joint N: Supra scapular nerve B: Supra scapular artery
Rotator Cuffs: Infraspinatus
O: Infraspinous fossa I: Greater tubercle A: Lateral rotation of arm @ GH joint N: Supra scapular nerve B: Circumflex scapular artery
Rotator Cuffs: Teres Minor
O: Superior lateral border of scpula I: Greater tubercle A: Lateral rotation of arm @ GH joint N: Axillary nerve B: Circumflex scapular Artery
Most commonly injured Rotator Cuff
Supraspinatus
Which muscles insert on greater tubercle
Supraspinatus
Infraspinatus
Teres Minor
*SIT
Which 2 muscles are innervated by Axillary Nerve
Deltoids
Teres Minor
Name a synergist for Deltoids
Supraspinatus
Name an antagonist for Deltoids
Teres Major
Which 4 muscles receive blood from Circumflex Scapular Artery
Infraspinatus
Teres Minor
Subscapularis
Teres Major
Which Artery do the Deltoids receive blood from
Circumflex Humeral Artery
Which Artery does Supraspinatus receive blood from
Suprascapular Artery
Which 2 muscles are innervated by Supra Scapular Nerve
Supraspinatus
Infraspinatus
Which 2 muscles are innervated by Subscapular Nerve
Subscapularis
Teres Major
Subscapularis
O: Subscapular Fossa of Scapula I: Lesser Tubercle A: Medial rotation @ GH Joint N: Subscapular Nerve B: Circumflex Scapular
Teres Major
O: Inferior Angle + Inferior Lateral Border of Scapula
I: Medial Lip of Bicipital Groove
A: Medial Rotation, ADduction, and Extension of arm @ GH Joint
N: Subscapular Nerve
B: Circumflex Scapular
Coracobrachialis
O: CoraCoid Process of Scapula I: Medial Shaft of Humerus A: Flexion, Horizontal ADduction of arm @ GH Joint N: Musculocutaneous Nerve B: Brachial Artery
Biceps Brachii
O: Long Head = Supraglenoid Process
Short Head = CoraCoid Process
I: Radial Tuberosity and Bicipital Aponeurosis
A: Flexion @ GH Joint
Flexion of forearm @ Elbow Joint
Supinates forearm @ Radioulnar Joint
N: Musculocutaneous Nerve
B: Brachial ArteryBrachialis
O: Distal 1/2 of Anterior Shaft of Humerus
I: Ulnar Tuberosity and CoraNoid Process of Ulna
A: Flexion of Forearm @ Elbow Joint
N: Musculocutaneous Nerve
B: Brachial Artery
Triceps Brachii
O: Long Head = Infraglenoid Tubercle
Lateral Head = Proximal 1/2 of Posterior Humeral Shaft
Medial Head = Distal 1/2 of Posterior Humeral Shaft
I: Olecranon Process of Ulna
A: Extends forearm @ Elbow Joint
*Long Head belly Extends arm @ GH Joint
N: Radial Nerve
B: Deep Brachial Artery
Difference between Brachial and Deep Brachial Artery
Brachial = Anterior arm
Deep Brachial = Posterior Arm
