Axilla - Brachial Plexus Flashcards
Dorsal scapular nerve roots?
C5
Long thoracic nerve roots?
C5 - C7
Suprascapular nerve roots?
C5, C6
Subclavian nerve roots?
C5, C6
Lateral pectoral nerve roots?
C5-C7
Medial Pectoral nerve roots?
C8, T1
Medial brachial cutaneous nerve roots?
T1
Medial Antebrachial cutaneous nerve roots?
C8, T1
Upper subscapular nerve roots?
C5, C6
Thoracodorsal (middle subscapular) nerve roots?
C6-C8
***C6 is an inconsistent contributor
Lower subscapular nerve root?
C5, C6
Musculocutaneous nerve roots?
C5-C7
Axillary nerve roots?
C5, C6
Radial nerve roots?
C5-C8, T1
***all brachial plexus nerve roots, BUT T1 IS INCONSISTENT CONTRIBUTOR
Ulnar nerve roots?
C8, T1
Median nerve roots?
C5-C8, T1
Cords of the brachial plexus are named in reference to the…
axillary artery
Roots pass between the…
anterior and middle scalene muscles
Divisions occur as the plexus passes behind the…
clavicle
the “M” in the brachial plexus is made up of what terminal nerves?
Musculocutaneous, median, ulnar
(all anterior branches)
Suprascapular nerve is going to run through what part of the scapula?
Suprascapular notch (superior notch)
Musculocutaneous nerve pierces what muscle and then travels where?
pierces the coracobrachialis muscle
travels inferior between the biceps brachii and brachialis
The musculocutaneous nerve continues as the…
Lateral antebrachial cutaneous nerve
Musculocutaneous nerve innervates…
anterior compartment of arm (biceps brachii, brachialis, coracobrachialis)
skin of the lateral aspect of the forearm (bc it continues as the LABC n)
The axillary nerve travels posteriorly with what artery in what space?
Posterior circumflex humeral artery
Quadrangular space
The axillary nerve continues as the…
Lateral brachial cutaneous nerve
Axillary nerve innervates…
deltoid, teres minor, GH joint
skin over superolateral arm (deltoid area)
The radial nerve enters the radial groove on the posterior humerus along with the…
deep (profunda) brachial artery
What nerve branches off of the radial nerve around mid-shaft of posterior humerus?
Posterior antebrachial cutaneous nerve
Radial nerve branches into the…
superficial and deep branches of the radial nerve