Brachial plexus Flashcards
Which of the spinal nerves make up the brachial plexus?
C5 to T1
What five nerves is the BP linked to?
Musculocutaneous Median Radial Ulnar Axillary
What does the musculocutaneous nerve control?
All muscles in the anterior compartment of the arm
Which spinal nerves innervate the musculocutaneous nerve?
C5 to C7
What does the median nerve control?
Most flexors in the forearm and the thenar muscles in hand
Which spinal nerves innervate the median nerve?
C5, C6, C7, C8, T1
What does the radial nerve control?
Posterior compartment of upper limb
Which spinal nerves innervate the radial nerve?
C5, C6, C7, C8, T1
What does the ulnar nerve control?
Hand and forearm
Which spinal nerves innervate the radial nerve?
C5, C6, C7, C8, T1
What does the axillary nerve control?
Deltoid muscle
Which spinal nerves innervate the axillary nerve?
C5, C6
What are the 5 roots of the brachial plexus?
C5, C6, C7, C8, T1
What are the three trunks of the bp?
Superior, middle, inferior
What are the three cords of the bp?
Lateral, medial, posterior
What is a nerve?
Millions of axons moving together, no cell body or neuron
What are the outputs of the bp?
Peripheral nerves - cutaneous/motor nerves
What are the inputs of the bp?
Spinal nerves - dermatomes/myotomes
Which three peripheral nerves control the hand?
Radial, medial, ulnar
What is the peripheral nervous system?
The nervous system outside the CNS
What is a dermatome?
Area of skin where sensory nerves derive from one spinal nerve
What is a myotome?
Muscles are innervated by a single spinal nerve
Which three spinal nerves/dermatomes control the hand?
C8, C7, C6
Dermatome of C2
Lower jaw, back of head
