Brachial plexus

Question 1

1.

Roots of brachial plexus ?

Answer 1

C5, C6, C7, C8, T1

Question 2

Brachial plexus begins in the ..1.. extends to …2..

Answer 2

1. neck
2. axilla, arm, forearm, hand

Question 3

Brachial plexus is a network of …

Answer 3

interlacing nerves found in the upper arm area

Question 4

Structural organisation of of brachial plexus ?

Answer 4

Trunks: superior, middle, inferior

Divisions : anterior + posterior

Cords : lateral, posterior, medial

Branches: musculocutaneous, axillary, median, radial, ulnar

Question 5

Branches of brachial plexus ?

Answer 5

• musculocutaneous
• axillary
• median
• radial ulnar

Question 6

Damage to musculocutaneous nerve branch = loss of ….?

Answer 6

• anterior arm compartment muscles

Question 7

Damage to axillary nerve branch = loss of ….?

Answer 7

deltoid & teres minor

Question 8

Damage to axillary nerve branch can happen because of what ?

Answer 8

• dislocation of shoulder
• surgical neck of humerus fracture

Question 9

Damage to median nerve branch =
1. loss of most of the …. of forearm muscles
2. ….. muscles
3. …… 1 & 2

Answer 9

1. anterior compartment
2. thenar
3. lumbricals

Question 10

Damage to radial nerve branch results in loss of …?

Answer 10

posterior arm & posterior forearm compartment muscles

Question 11

Reasons why damage to radial nerve branch could happen ?

Answer 11

• humeral shaft through spiral groove
• dislocated head of radius affectes posterior interosseous nerve

Question 12

Damage to ulnar nerve branch results in = loss of most of the … ?

Answer 12

• small muscles of the hand

Question 13

Damage to ulnar nerve branch happens why ?

Answer 13

• damage to medial humeral , epicondyle
• injury to the anterior wrist

Question 14

Branches of the lateral cord ?

Answer 14

• lateral pectoral nerve
• lateral root of the median nerve
• musculocutaneous nerve

Question 15

Branches of the medial cord ?

Answer 15

• medial brachial cutaneous nerve
• medial antebrachial cutaneous nerve
• medial pectoral nerve
• ulnar nerve
• medial root of median nerve

Question 16

Branches of the posterior cord ?

Answer 16

• upper subscapular nerve
• lower subscapular nerve
• thoracodorsal nerve
• radial nerve
• axillary nerve