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What muscles make up the rotator cuff?
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis
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What muscle originates from the occipital bone, nuchal ligament, and T1-T3 and inserts to the spine of scapula acromion and lateral 3rd of clavicle?
Trapezius
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What nerve innervates the trapezius?
Accessory Nerve (CN XI)
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Where does the latissimus insert?
posterior edge of intertubercular groove
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What actions does the latissimus dorsi conduct?
- adduction
- extension and medial rotation of humerus
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What is the origin and insertion of the levator scapulae?
- Origin: posterior tubercle of first 4 cervical vertebra
- Insertion: superior medial corner of scapula
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What is the insertion of the the rhomboid muscles?
medial border of scapula
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What is the insertion of the seratus anterior?
medial border of scapula
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What nerve innervates the seratus anterior?
long thoracic nerve
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What does injury of the long thoracic nerve cause?
winged scapula
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Which rotator cuff muscle inserts at the lesser tuberosity?
Subscapularis
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Where do three of the rotator cuff muscles insert?
greater tuberosity
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Which rotator cuff muscle initiates abduction of humerus?
supraspinatus
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What is the origin and insertion of the Teres Major?
- Origin = inferior angle of scapula
- Insertion = medial crest of intertubercular groove
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What muscle originates at the spine of scapula, acromion, and lateral 3rd of clavicle?
Deltoid
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What is the insertion of the deltoid muscle?
Deltoid Tuberosity
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What nerve innervates the deltoid?
Axillary nerve
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What nerve innervates the biceps brachii?
Musculocutaneous Nerve
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What is the origin of the long head and short head biceps brachii?
- Long head = supraglenoid tubercle
- Short head = coracoid process
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What is the origin of the coracobrachialis?
coracoid process
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What nerve innervates the coracobrachialis?
Musculocutaneous Nerve
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What nerve innervates the pectoralis minor?
medial pectoral nerve
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What nerves innervate the Pectoralis major?
Lateral and medial pectoral nerve
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Which shoulder bursea does not have communication with the glenoid cavity?
Subacromion Bursea
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what portion of the triangle of auscultation is formed by the medial border of scapula?
Lateral border
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What forms the superior aspect of the trianle of auscultation?
lateral border of trapezius
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What forms the medial border of the triangle of auscultation?
superior border of latissimus dorsi
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What is the clinical correlation of the triangle of auscultation?
best place to hear lungs
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What muscles make up the anterior boundary of the axilla?
- Pec Major
- Pec Minor
- Clavipectoral fascia
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What makes up the posterior border of axilla?
- subscapularis
- teres major
- latissimus dorsi
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What makes up medial border of axilla?
serratus anterior
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What makes up lateral border of axilla?
intertubercular sulcus
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What makes up the apex of the axilla?
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What are the two main contents of the axilla?
- axillary artery (cont.. of subclavian artery)
- brachial plexus cords and branches
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What are the four types of brachial plexus injuries?
- Avulsion (most severe, nerve torn from spine)
- Rupture (Torn other than spinal attachment)
- Neuroma (scaar tissue creates pressure)
- Neuropraxia (most common, stretch)
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Which nerve innervates all the posterior arm and forearm?
Radial nerve
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