M29: Upper Extremity I - Neurovasculature

Subclavian becomes axillary artery

Lateral border of the first rib

Axillary becomes brachial artery

Inferior border of the teres major

Brachial artery bifurcation

Cubital fossa

Thyrocervical trunk branches

Suprascapular artery and dorsal scapular artery

Suprascapular artery supply

Supraspinatus and infraspinatus

Dorsal scapular artery supply

Levator scapulae, rhomboids, and trapezius

Pectoralis minor function in vasculature

Divides axillary artery into three parts

Superior thoracic artery supply

Superior part of serratus anterior

Thoracoacromial artery branches

Acromial, clavicular, pectoral, and deltoid branches

Lateral thoracic artery supply

Serratus anterior and pectoralis muscles

Humerus surgical neck anastomosis

Anterior and posterior circumflex humeral arteries

Largest branch of axillary artery

Subscapular artery

Thoracodorsal artery supply

Latissimus dorsi

Deep brachial artery supply

Triceps brachii and posterior arm

Palmar arches formation

Anastomosis of radial and ulnar arteries

Cephalic vein drainage

Axillary vein

Basilic vein junction

Joins with brachial vein to form axillary vein

Median cubital vein location

Antecubital region linking cephalic and basilic veins

Median cubital vein clinical use

Most common site for drawing venous blood

Brachial plexus roots

Anterior rami of C5-T1

Superior trunk roots

C5 and C6

Middle trunk root

C7

Inferior trunk roots

C8 and T1

Lateral cord formation

Anterior divisions of superior and middle trunks

Medial cord formation

Anterior division of inferior trunk

Posterior cord formation

Posterior divisions of all three trunks

Five terminal branches

Axillary, median, musculocutaneous, radial, and ulnar nerves

Axillary nerve muscle innervation

Deltoid and teres minor

Axillary nerve sensory

Anterolateral to posterolateral shoulder

Musculocutaneous nerve muscle innervation

Coracobrachialis, biceps brachii, and brachialis

Musculocutaneous nerve sensory

Lateral forearm

Radial nerve muscle innervation

All muscles of posterior arm and forearm

Radial nerve sensory

Posterior arm, posterior forearm, and posterolateral hand

Median nerve muscle innervation

Most anterior forearm and 1/2 LOAF hand muscles

1/2 LOAF hand muscles

Lateral 2 lumbricals, Opponens pollicis, Abductor pollicis brevis, Flexor pollicis brevis

Median nerve sensory

Anterolateral hand, thumb, and distal posterior digits 2 and 3

Ulnar nerve muscle innervation

Flexor carpi ulnaris, medial 1/2 flexor digitorum profundus, and most hand muscles

Ulnar nerve sensory

Medial hand anterior and posterior

Proximal to distal gradient C5-C6

Innervate most proximal muscles

Proximal to distal gradient C8-T1

Innervate most distal hand muscles

C5 myotome motion

Shoulder abduction

C6 myotome motion

Elbow flexion

C7 myotome motion

Elbow extension

C8 myotome motion

Finger flexion

T1 myotome motion

Finger abduction and adduction

Cubital fossa contents

Biceps tendon, brachial artery, median nerve, and radial nerve

Neurogenic Thoracic Outlet Syndrome

Compression of brachial plexus nerves

Venous Thoracic Outlet Syndrome

Compression of subclavian vein between first rib and clavicle