Nerve supply for upper and lower limb

Question 1

What is the brachial plexus

Answer 1

The brachial plexus is a network of nerve fibres that send signals from the spinal cord to the skin and musculature of the upper limb (Shoulder, Arm, Hand)

Question 2

Describe the path of the brachial plexus

Answer 2

It begins in the root of the neck, passes laterally and inferiorly over rib 1, passes through the axilla, and runs through the entire upper extremity.

Question 3

Where does the brachial plexus begin

Answer 3

It begins in the root of the neck

Question 4

Where does the brachial plexus pass through, from its origin

Answer 4

It passes over rib 1 through the axilla and runs through the entire upper extremity.

Question 5

Which structures form the brachial plexus

Answer 5

The plexus is formed by the **anterior rami (divisions) ** of cervical spinal nerves C5, C6, C7 and C8, and the first thoracic spinal nerve, T1. [C5-T1]

Question 6

How many parts is the brachial plexus divided into

Answer 6

5

Question 7

List the parts of the brachial plexus (5)

Answer 7

• Roots
• Trunks
• Divisions
• Cords
• Branches

Question 8

What is the mnemonic for the parts of the brachial plexus

Answer 8

Read That Damn Cadaver Book
Really Thirsty Drink Cold Beer

Question 9

Function of motor neuron

Answer 9

Supply all muscles related to movement of the upper limb

Question 10

Function of sensory neuron

Answer 10

Cutaneous (skin) innervation

Question 11

How do the roots of the brachial plexus exit the spinal cord

Answer 11

At each vertebral level, paired spinal nerves arise. They leave the spinal cord via the intervertebral foramina of the vertebral column.

Question 12

What happens to the spinal nerves after they exit the spinal cord

Answer 12

Each spinal nerve then divides into an anterior and a posterior ramus