Brachial Plexus

Question 1

Brachial Plexus: Definition

Answer 1

Formed from anterior primary rami of spinal nerves CN5-TN1 in the posterior triangle of the neck

Question 2

What are its basic parts in order?

Answer 2

Rami
Trunks
Divisions
Cords
Nerves

Question 3

Dorsal Scapular Nerve

Answer 3

To Rhomboid muscles from anterior primary ramus of C5

Pierces Scalenus medius muscle

Question 4

Long thoracic nerve

Answer 4

To serratus anterior from anterior primary rami of C5, 6, and 7
Pierces scalenus medius muscle

Question 5

Suprascapular nerve

Answer 5

To supraspinatus and infraspinatus muscles from upper trunk

Goes through scapular notch

Question 6

Nerve to subclavius

Answer 6

From upper trunk

Question 7

Lateral Pectoral Nerve

Answer 7

To pectoralis major muscle from lateral cord

Goes through costocoracoid membrane

Question 8

Medial Pectoral Nerve

Answer 8

To pectoralis major and minor muscles from medial cord

Question 9

Medial Brachail Cutaneous

Answer 9

From medial cord

Question 10

Medial Antebrachial cutaneous

Answer 10

From Medial cord

Question 11

Upper subscapular nerve

Answer 11

To subscapularis muscle from posterior cord

Question 12

Lower subscapular Nerve

Answer 12

To subscapularis and teres major muscles from posterior cord

Question 13

Axillary nerve

Answer 13

To deltoid and teres minor muscles from posterior cord

Question 14

Radial nerve

Answer 14

To all dorsal muscles of upper limb from posterior cord

Question 15

Musculocutaneous nerve

Answer 15

To anterior compartment of arm from lateral cord

Question 16

Median nerve

Answer 16

Major nerve to anterior forearm minor nerve to hand

from both medial and lateral cords

Question 17

Ulnar nerve

Answer 17

Minor nerve to anterior forearm major nerve to hand

From medial cord