prosection videos week 2 anatomy

What is the clinical sign of long thoracic nerve damage?

Scapular winging

What muscle does the long thoracic nerve innervate?

Serratus anterior

What muscles are innervated by the lower subscapular nerve?

Subscapularis and teres major

What does the medial cutaneous nerve of the arm innervate?

Skin of the medial arm

What part of the body is affected when you hit your “funny bone” (ulnar nerve)?

Fourth and fifth digits

What muscle does the musculocutaneous nerve innervate?

Coracobrachialis

What muscles does the medial pectoral nerve innervate?

Pectoralis major and pectoralis minor

What is the action of serratus anterior?

Scapular protraction

What clinical action is used to test for serratus anterior dysfunction?

Pushing against a wall — if the scapula wings, serratus anterior is weak or denervated

Where is subscapularis located and what does it attach to?

It sits in the subscapular fossa and attaches to the anterior surface of the scapula

Where does serratus anterior attach?

It attaches to the lateral thoracic wall and the medial (vertebral) border of the scapula

What does the lateral thoracic artery supply?

Lateral thoracic wall and (implied) the breast

What muscle does the thoracodorsal artery supply?

Latissimus dorsi

What are the two branches of the subscapular artery?

Circumflex scapular artery and thoracodorsal artery

What does the posterior circumflex humeral artery travel with?

The axillary nerve, through the quadrangular space

What muscle divides the axillary artery into 3 parts?

Pectoralis minor

What is the branch of the 1st part of the axillary artery?

Superior thoracic artery

What are the 2 branches of the 2nd part of the axillary artery?

Thoracoacromial artery and lateral thoracic artery

What are the 3 branches of the 3rd part of the axillary artery?

Subscapular, anterior circumflex humeral, posterior circumflex humeral arteries

What branch of the axillary artery supplies latissimus dorsi?

Thoracodorsal artery (from subscapular)

What are the branches of the lateral cord?

1. Musculocutaneous nerve

2. Lateral root of the median nerve

3. Lateral pectoral nerve

What muscle does the musculocutaneous nerve pierce?

Coracobrachialis

What are the branches of the medial cord?

1. Ulnar nerve

2. Medial root of the median nerve

3. Medial pectoral nerve

4. Medial cutaneous nerve of the forearm

5. Medial cutaneous nerve of the arm (tiny, often fragmented)

What are the branches of the posterior cord?

1. Axillary nerve

2. Radial nerve

3. Upper subscapular nerve

4. Thoracodorsal nerve (middle subscapular)

5. Lower subscapular nerve