2 - Brachial Plexua Flashcards
What is the structure shown in the image?
The brachial plexus
What exactly is the brachial plexus?
A network of nerve fibres that run through the neck and axilla, into the arm.
What are the five divisions of the brachial plexus?
Read That Damn Cadaver Book
- Roots
- Trunk
- Divisions
- Cords
- Branches
What is A?
Roots of brachial plexus
What do 1-5 represent?
The anterior fibres of spinal nerves C5, C6, C7, C8, T1 respectively
What is a distinctive feature of the components of A?
What is B?
The trunks
What is 6, and what is it a combination of?
Superior trunk: A combination of C5 and C6 roots.
What is 7?
Middle trunk: A continuation of C7.
What is 8?
Inferior trunk: A combination of C8 and T1 roots.
When are the trunks formed?
just before they enter the axilla through the axillary inlet (or apex)
What is C?
The divisions
What are 9 and 10?
9 - Anterior divisons 10 - Posterior divisions
What do the divisions leave us with?
What is D?
The cords