Brachial plexus

Question 1

Name the 4 parts of the brachial plexus

Answer 1

Roots
trunks
divisons
cords

Question 2

How many roots are there

Answer 2

5

Question 3

how many trunks are there

Answer 3

3

Question 4

How many divisions are there

Answer 4

6

Question 5

How many cords are there

Answer 5

3

Question 6

Name the 5 roots of brachial plexus

Answer 6

C5, C6, C7, C8, T1

Question 7

What roots form the upper trunk

Answer 7

C5,C6,C7

Question 8

What roots from the middle trunk

Answer 8

C7

Question 9

What roots form the lower trunk

Answer 9

CB, T1

Question 10

What do trunks divide to form

Answer 10

anterior/posterior trunk division

Question 11

Name the 3 cords

Answer 11

Lateral, posterior and anterior

Question 12

What forms the posterior cord

Answer 12

the upper, middle and lower posterior trunks

Question 13

What forms the lateral cord

Answer 13

anterior upper and middle trunk

Question 14

What forms the medial cord

Answer 14

the anterior lower trunks

Question 15

Name the 5 terminal branches

Answer 15

1 - musculo-cutaneous
2 - median
3 - ulnar
4 - radial
5 - axillary

Question 16

What cords form the musculo-cutaneous terminal branch

Answer 16

lateral

Question 17

What cords form the median terminal branch

Answer 17

lateral and medial

Question 18

what cords form the ulnar terminal branch

Answer 18

medial

Question 19

what cords form the radial terminal branch

Answer 19

posterior

Question 20

what cords form the axillary terminal branch

Answer 20

posterior

Question 21

Why is the brachial plexus important in clinical medicine - with reference to closed injuries

Answer 21

On clinical examination, accurate asssesment of the pattern of muscle weakness can guide the clinican to work out the level of injury

Question 22

Why is the brachial plexus important in clinical medicine - with reference to anaesthestics

Answer 22

When an operation is being performed on the upper limb, brahcial plexus nerve blocks are performed supra or infraclavicular, so that the person will not feel the pain from the operation