Brachial Plexus
How many anterior and posterior divisions
3 anterior and 3 posterior
Cords are named according to relationship of what artery
Axillary Artery
What spinal nerves contribute to the ulnar nerve
C8-T1
Axillary nerve does sensory along
lateral aspect of shoulder and arm
The Thoracodorsal nerve contains what spinal nerves
C6-C8
What nerve and artery can be found in the Quadrangular space
Axillary nerve and Posterior circumflex humeral artery
What nerves from the posterior cord are terminal branches
Axillary nerve, and Radial nerve
Where is the gap that the spinal nerves pass out
Between the anterior and middle scalenes
Floor of cubital fossa
Brachialis & Supinator
Lateral boundary of cubital fossa
Brachioradialis
What root does the Dorsal scapular nerve come out
C5 Root
Axillary nerve contains what spinal nerves
C5, C6
The Upper subscapular nerve contains what spinal nerves
C5- C6
Lateral pectoral nerves arises from what spinal nerves
C5-7
Musculocutaneous nerve arises from what spinal nerves
C5-7
The lower subscapular nerve contains what spinal nerves
C5-C6
Radial nerve contains what spinal nerves
C5-T1
Infraclavicular branches arise
Cords in the axilla
Axillary nerve goes to
Deltoid and teres minor
As Trunks pass into axilla region, what do they become and where are they to the clavicle
Divisions, posterior to clavicle
Name the Supraclavicular nerves
Dorsal Scapular, Long Thoracic, nerve to subclavius, suprascapular nerves
Lateral cord contribution to median nerve does what, what spinal nerves
Flexors in forearm and thenar, sensory; C6-7
C8 gives rise to what trunk
Inferior Trunk
T1 gives rise to what trunk
Inferior Trunk
Lateral cord turns into what branch
Musculocutaneous nerve
Medial pectoral (L) Lateral pectoral nerve (R)
Name both nerves
Nerve to subclavius, Long thoracic nerve (photo)
Name both nerves
Roots to trunks occurs where
Neck
Where is the brachial plexus found
Neck and axilla
Lateral pectoral nerve innervates what muscle
Pectoralis Major
What does the medial pectoral nerve innervate
Pectoralis minor and major
Posterior divisions innervate
Postaxial (extensors)
Posterior cords are derived from what division
Postaxial (posterior) Division
The order of the brachial plexus
Roots (spinal nerves), trunks, divisions, cords, branches (peripheral nerves)
Dorsal scapular nerve branches off from what
Roots, C5
Long Thoracic nerve branches off from what
Roots, C5-C7
Posterior cord is formed by
Posterior divisions of all three trunks ( Superior, Middle, and Inferior)
Lateral and medial cords are derived from what division
Preaxial (anterior) Division
Anterior divisions innervate preaxial or postaxial
Preaxial (flexors)
Medial boundary of cubital fossa
Pronator Terres
Posterior cord turns into what branch(es)
Radial and Axillary nerve
What nerve and artery can be found in the Triangular Interval
Radial nerve and Profunda Brachii artery
Contents of cubital fossa
Radial nerve, Radial recurrent artery, tendon of biceps, brachial artery, median nerve, ant. ulnar recurrent artery
Arrangement of nerves in cubital fossa, lateral to medial
Radial, Musculocutaneous, Median, Ulnar
Dorsal scapular neve innervates what
Rhomboids and levator scapulae
What does the medial brachial cutaneous nerve do
Sensory: to the medial aspect of the arm
What does the medial antebrachial cutaneous nerve do
Sensory: to the medial aspect of the forearm
Long Thoracic nerve innervates what
Serratus anterior
The lower subscapular nerve goes to
Subscapularis and teres major
C5 gives rise to what trunk
Superior Trunk
C6 gives rise to what trunk
Superior Trunk
What trunk does the nerve to subclavius come from
Superior Trunk
Nerve to subclavius branches from what
Superior trunk, C5-C6
Suprascapular nerve branches from what
Superior trunk, C5-C6
Suprascapular nerve innervates what
Supraspinatus and infraspinatus
The Upper subscapular nerve goes to
Supscapularis
Medial cord turns into what branch
Ulnar nerve
The Posterior cord gives rise to what nerves
Upper subscapular, thoracodorsal (middle subscapular), lower subscapular, axillary, and radial nerves
What roots is the brachial plexus formed from
Ventral rami of spinal nerves C5-T1
Median Nerve (photo)
What nerve
The Radial nerve goes to
extensors in arm and in forearm
What does the ulnar nerve innervate
Majority of intrinsic hand muscles
How many cords, what are they
3; Lateral, Posterior, Medial
How many trunks, what are they
3; Superior, Middle, Inferior
How many roots, what are they
5; C5, C6, C7, C8, T1
Musculocutaneous nerve destination and function
Anterior arm muscles; sensory (lateral forearm)
Medial cord is formed by
Anterior division of inferior trunk
Lateral cord is formed by
Anterior divisions of superior and middle trunks ->
Cords to main branches occurs where
Axilla
Divisions to cords occurs where
Axilla
Lateral pectoral nerve branches from what cord
Lateral Cord
Musculocutaneous nerve branches from what cord
Lateral cord
Roof of cubital fossa
Lateral cutaneous nerve, medial cutaneous nerve, median cubital vein
The Thoracordorsal nerve goes to
Latissimus dorsi
The ulnar nerve is a branch from what cord
Medial Cord
Medial antebrachial cutaneous nerve is a branch from what cord
Medial cord (C8-T1)
Medial brachial cutaneous nerve is a branch from what cord
Medial cord (C8-T1)
Medial pectoral nerve is a branch from what cord
Medial cord, (C8-T1)
Medial nerves from medial cord, proximally to distally
Medial pectoral nerve, Medial brachial cutaneous nerve, Medial antebrachial cutaneous nerve
The medial nerve cord contributes to what nerve
Median Nerve
Lateral and medical cords turn into what branch
Median nerve
The Thoracordorsal nerve is also called
Middle Subscapular
C7 roots gives rise to what trunk
Middle Trunk