All things Brachial

Question 1

What muscles does the brachial plexus emerge from?

Answer 1

Exit the next between the scalenus anterior and the scalenus medius

Question 2

What are the direct nerve branches from the rami?

Answer 2

dorsal scapular nerve and the long thoracic nerve

Question 3

What does the dorsal scapular nerve innervate?

Answer 3

rhomboid and levator scapulae muscles

Question 4

What does the long thoracic nerve innervate?

Answer 4

serrates anterior

Question 5

What are the direct nerve branches from the trunk?

Answer 5

Suprascapular nerve

nerve to the subclavius

Question 6

What does the supra scapular nerve innervate?

Answer 6

supraspinatus and infraspinatus muscles

Question 7

Where do the anterior divisions of the brachial plexus travel?

Answer 7

To the trunks of the anterior compartments of the upper extremity. Form the lateral and medial cords

Question 8

Where do the posterior divisions of the brachial plexus travel?

Answer 8

The posterior compartments of the upper extremity. From the posterior cord

Question 9

What are the direct branches of the lateral cord?

Answer 9

Lateral pectoral nerve

Question 10

What does the lateral pectoral nerve innervate?

Answer 10

clavicular head of the pectoralis major muscle

Question 11

What are the terminal nerves of the lateral cord?

Answer 11

Musculocutaneous and the lateral root of the median nerve

Question 12

What are the direct branches of the medial cord?

Answer 12

Medial pectoral nerve
medial cutaneous nerve to the arm (brachium)
medial cutaneous nerve to the forearm (ante brachium)

Question 13

What are the terminal branches of the medial cord?

Answer 13

ulnar

medial root of the median nerve

Question 14

What does the medial pectoral nerve innervate?

Answer 14

sternal head of the pectoralis major and the pectoralis minor

Question 15

What are the direct branches of the posterior cord?

Answer 15

Upper subscapular nerv
thoracodorsal nerve
lower subscapular nerve

Question 16

What does the upper subscapular nerve innervate?

Answer 16

subscapularis muscle

Question 17

What does the thoracodorsal nerve innervate?

Answer 17

latissimus dorsi muscle

Question 18

What are the terminal branches of the posterior cord?

Answer 18

axillary nerve

radial nerve

Question 19

What are the motor components of the axillary nerve?

Answer 19

deltoid and teres minor muscles

Question 20

What are the sensory components of the axillary nerve?

Answer 20

skin on arm over the deltoid muscle

upper lateral cutaneous nerve

Question 21

What are the motor components of the radial nerve?

Answer 21

Posterior compartments of the arm and forearm of the brachioradialis muscle

Question 22

What are the sensory components of the radial nerve?

Answer 22

Back of the forearm and the hand

Question 23

What does the lower subscapular nerve innervate?

Answer 23

subscapularis

teres major