Anatomy Flashcards
What spinal nerves contribute to the brachial plexus?
C5, C6, C7, C8, T1
What are the sections of the brachial plexus?
Roots, Trunks, Divisions, Cords, Branches
Read the damn cadaver book
How many trunks are there / names?
3
Superior, middle, inferior
What are the divisions?
anterior and posterior
How are cords named?
named by position relative to the axillary artery
How many cords are there / names?
3
lateral, posterior and medial
Which part of spinal nerves contribute to the plexus?
anterior rami
Main branches of plexus?
5
Axillary, radial, musculocutaneous, median and ulnar
Long thoracic nerve from what nerve roots?
C5, C6 and C7
What does the long thoracic nerve supply?
Serratus anterior
Which trunk gives off the suprascapular nerve?
Superior trunk
What does the suprascapular nerve supply?
supraspinatus and infraspinatus
Nerve supply to subscapularis
Upper and lower subscapular nerves
from posterior cord
What branches does the posterior cord give?
Radial, axillary
Upper and lower subscapular nerves, thoracodorsal nerve
Nerve supply to latissimus dorsi
Thoracodorsal nerve (from posterior cord)
What branches do the lateral and medial cords give?
musculocutaneous, median and ulnar
M shape
What is the brachial plexus?
a network of nerve fibres supplying the upper limb
Where is the brachial plexus found?
Begins at the root of the neck, passes through the axilla and into the upper limb
Axillary nerve - sensory supply to…
Badge patch area
Axillary nerve - motor supply to…
Deltoid and teres minor
Radial nerve - sensory supply to…
Posterior forearm, lateral dorsal surface of hand and lateral 3 +1/2 digits up to PIP joints
Radial nerve - motor supply to…
Posterior arm - triceps Posterior forearm (and lateral compartment)
Musculocutaneous nerve - sensory supply to…
Lateral surface of the forearm
Musculocutaneous nerve - motor supply to…
Anterior arm
coracobrachialis, biceps, brachialis
Musculocutaneous nerve - movements
Flexion at shoulder and elbow
supination of forearm (biceps)
Median nerve - sensory supply to…
palm of hand to half of 4th digit
dorsal surface - skin over the lateral 3 + 1/2 digits from PIP joints to tip of fingers
Median nerve - motor supply to…
most muscles in forearm (except FCU and 1/2 of FDP)
LOAF muscles in hand
Ulnar nerve - sensory supply to…
medial fingers (1+1/2) and associated palmar/dorsal area of hand
Ulnar nerve - motor supply to…
All muscles in hand (except LOAF)
FCU and 1/2FDP (to 4th and 5th digit) in forearm
Where are the roots found?
In the neck
Where are the trunks?
Supraclavicular
Where are the branches?
Behind the clavicle
