Flashcards in Brachial Plexus Deck (32):
5 Roots (C5-T1)
3 Trunks (superior, middle, inferior)
6 Divisions (each trunk into anterior and posterior)
3 cords (lateral, medial, posterior)
5 terminal branches
5 roots give off what nerves?
Dorsal scapular (C5)
Long Thoracic (C5,6,7)
Union of C5 and C6
Superior trunk gives off what nerves?
Continuation of C7
Union of C8 and T1
Innervates flexor muscles
Innervates extensor muscles
Union of anterior division of superior and middle trunks
Carry C5,6,7 fibers
What branches off the lateral cord?
Lateral pectoral (C5,6,7)
Continuation of anterior division of inferior trunk
Carry C8 and T1 fibers
What branches off the medial cord?
Medial pectoral (C8-T1)
Medial cutaneous of arm (C8-T1)
Medial cutaneous of forearm (C8-T1)
Medial cutaneous of arm provides sensation where?
Medial side of arm
Superior part of forearm
Medial cutaneous of forearm provides sensation where?
Medial side of forearm
Union of all three posterior divisions
Carry C5-T1 Fibers
What branches does the posterior cord give off?
Upper subscapular (C5,6)
Lower sub scapular (C6,7)
5 Terminal Branches
Axillary - posterior cord
Musculocutaneous - lateral cord
Median - lateral and medial cord
Radial - posterior cord
Ulnar - medial cord
What clinical sign comes from superior BP injury?
Erb's palsy - separation of head and neck with fall, stretching during baby delivering
What clinical sign comes from inferior BP injury?
Sudden pull of arm superiorly trying to grab something
What clinical sign comes from median nerve injury?
Hand of benediction
What clinical sign comes from radial nerve injury?
What clinical sign comes from a biceps tendon rupture?
What is the clinical sign of Erb's palsy?
What is in the triangular space?
Circumflex scapular artery
What is in the quadrangular space?
Posterior circumflex humeral
What is in the triceps hiatus?
Thumb abduction test what nerves?
Thumb adduction test what nerve?
Thumb extension test what nerve?
Thumb flexion test what nerve?
Thumb opposition test what nerve?