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Brachial Plexus

Trunks ("Travis")

Roots ("Randy")

Divisions

("Drinks")

Cords

("Cold")

Branches

("Beer")

SPS

LP

Suprascapular Nerve (C5,C6)

Lateral Pectoral Nerve (C5,6,7)

Supraspinatus: Draws the humerus into the glenoid fossa. Abduction initiation. Lateral rotation.

Infraspinatus: Lateral rotation of the humerus

Pectoralis Major: Adduction of the arm, medial rotation

Pectoralis Minor (minor contrib.): Moves the scapula inferiorly, raises ribs

C5

MSC

Musculocutaneous Nerve (C5,6,7)

Superior

Lateral

Musculocutaneous

Anterior

Flexors of the Forearm

Coracobrachialis: Flexes and adducts arm

Biceps Brachii: Flexes forearm

Brachialis: Flexes forearm

Skin of the lateral aspect of the forearm

Posterior

AX

C6

SC

Axillary Nerve (C5,6)

TCD

Subclavian Nerve (C5, C6)

Teres minor: Lateral rotation and adduction of the arm

Deltoid: Abduction, medial rotation, flexion of the arm

Skin of the superolateral arm (over deltoid)

Subclavius: Draws the glenohumeral joint, as well as the clavicle, inferiorly and anteriorly.

Sternoclavicular Joint

Thoracodorsal Nerve (C6,7,8)

Latissimus Dorsi: Extends, adducts, and medially rotates the humerus

Lateral Root

Anterior

Axillary

MD

C7

Posterior

Middle

Median

Median Nerve (C5,6,7,8 T1)

Muscles of anterior part of forearm (Flexors)

Pronator Teres: Pronation

Flexor Carpi Radialis: flexes and abducts wrist

Palmaris Longus: flexes wrist

Flexor Digitorum Superficialis: Flexes proximal , wrist, and elbow

Flexor Digitorum Profundus: Distal flexion

Flexor Pollicis Longus: Distal thumb flexion

Pronator Quadratus: Pronation

Flexor Pollicis Brevis: Flexes proximal thumb

Abductor Pollicis Brevis: Abducts thumb

Opponens Pollicis: Opposes thumb

Lumbricals (1&2)

Palmar Skin

Radial

Medial Root

US

LS

LT

RD

Posterior

Upper Subscapular Nerve (C5)

Lower Subscapular Nerve (C6)

Long Thoracic (C5,6,7)

Subscapularis (Superior Portion): Medial rotation and adduction of the humerus

Serratus Anterior: Protracts scapula and holds it against thoracic wall; rotates scapula

Subscapularis (inferior portion): Medial rotation and adduction of the humerus

Teres Major: Medial rotation, extension, and adduction of the arm

Radial Nerve (C5,6,7,8 T1)

C8

ALL MUSCLES OF POSTERIOR COMPARTMENT OF UPPER LIMB (EXTENSORS)

Brachioradialis: Flexion of forearm

Extensor Carpi Radialis Longus and Brevis: Extends and abducts hand

Extensor Digitorum: Extends wrist and fingers

Extensor Digiti Minimi: Pinky extension

Extensor Carpi Ulnaris: Extends and adducts hand

Abductor Pollicis Longus: Abducts, extends, and rotates thumb laterally

Extensor Pollicis Brevis: Extends proximal thumb

Extensor Pollicis Longus: Extends distal thumb

Tricep: Extends arm and forearm

Extensor Indicis: Extension of index finger

Supinator: Supination

Skin of the posterior and inferolateral arm, posterior forearm, dorsum of the hand lateral to axial line of digit 4

UL

Ulnar

Anterior

Inferior

Medial

Ulnar Nerve (C7,8 T1)

Flexor Carpi Ulnaris: Flexes and adducts the wrist

Flexor digitorum profundus (Ulnar half): Distal flexion of phalanges

Intrinsic Muscles of the Hand

Abductor Digiti Minimi: Abducts pinky

Flexor Digiti Minimi: Flexes proximal pinky

Opponens Digiti Minimi: Adduction and opposition of pinky

Adductor pollicis: Adducts thumb

Lumbricals (3&4): Flex metocarpophalangial joints, extend interphalangeal joints

Interrosei:

3 Palmar-Adduct digits

4 Dorsal-Abduct digits

Skin of the medial hand to axial line of digit 4

MP

MABC

MBC

T1

Medial Antebrachial Cutaneous (C8, T1)

Medial Brachial Cutaneous (C8, T1)

Medial Pectoral (C8, T1)

Skin of the medial forearm, as far distal as the wrist.

Pectoralis Minor: Moves scapula inferior and raises ribs

Pectoralis Major (Sternocostal Part): Medial rotation and adduction of the arm.

Skin of the medial side of arm as far distal as the medial epicondyle of the humerus and olecranon of the ulna

DS

Dorsascapular Nerve (C5)

Levator Scapulae: Elevates the scapula

Rhomboid Major: Retract scapula

Rhomboid Minor: Retract scapula

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