Upper Extremity Myology Flashcards
Pectoralis Major M.
- Clavicular Head - Medial 1/2 of Clavicle
- Sternocostal Head - Anterior surface of Sternum, Costal Cartilages 1-6; Aponeurosis External Abdominal Oblique M.
- Lateral Edge of Intertubercular Groove of Humerus
- Adduct & Medially rotate Humerus; Protract and Depress Scapula; Clavicular Head flexes Humerus; Sternocostal Head extends Humerus
- Lateral and Medial Pectoral N.
Pectoralis Minor M.
Medial aspect of ribs 3-5
Coracoid Process of Scapula
Stabilize Scapula by protracting and depressing it against Thoracic Wall
Medial Pectoral N.
Subclavius M.
Upper border of 1st rib and 1st Costal Cartilage
Inferior Aspect of Clavicle
Positions and depresses clavicle
Nerve to the Subclavius M.
Serratus Anterior M.
Lateral External Surface of Ribs 1-8
Anterior Surface of Medial Border of Scapula
Protracts Scapula (Stabilizing against Thoracic Wall); Rotates Glenoid Cavity Superiorly
Long Thoracic N.
Deltoid M.
Lateral 1/3 of Clavicle; Scapular Spine; Acromion
Deltoid Tuberosity of Humerus
Anterior: Flex & Medially Rotate Humerus; Medial: Abduct Humerus; Posterior: Extend and Laterally Rotate Humerus
Axillary N.
Subscapularis M.
Medial aspect of Subscapular Fossa
Lesser Tubercle of Humerus
Medially Rotate and Adduct Humerus; Holds Humeral Head in Glenoid Cavity
Upper and Lower Subscapular N.
Supraspinatus M.
Supraspinous Fossa of Scapula
Greater Tubercle of Humerus
With Deltoid M. Abduct the Humerus; Holds Humeral Head in Glenoid Cavity
Suprascapular N.
Infraspinatus M.
Infraspinous Fossa of Scapula
Greater Tubercle of Humerus
Laterally Rotate Humerus; Holds Humeral Head in Glenoid Cavity
Suprascapular N.
Teres Minor M.
Middle part of Lateral Border of Scapula
Greater Tubercle of Scapula
Laterally Rotates Humerus; Holds Humeral Head in Glenoid Cavity
Axially N.
Teres Major M.
Posterior Aspect of the Inferior Angle Scapula
Medial Edge of Intertubercular Groove
Adduct and Medially Rotate Humerus
Lower Subscapular N.
Biceps Brachii M.
Long Head: Supraglenoid Tubercle of Scapula
Short Head: Coracoid Process of Scapula
Radial Tuberosity and Antebrachial Fascia as Bicipital Aponeurosis
Flex Humerus, Flex supine Forearm and Supinate the Forearm, Short Head resists dislocation of shoulder
Musculocutaneous N.
Coracobrachialis M.
Coracoid Process of Scapula
Medial aspect of Humeral Body
Flex and Adduct Humerus
Musculocutaneous N.
Brachialis M.
Distal half of anterior aspect of Humeral Body
Ulnar Tuberosity and Coronoid Process
Flex Forearm
Musculocutaneous N.
Triceps Brachii M.
Long Head: Infraglenoid Tubercle of Scapula
Medial Head: Posterior aspect of Humeral Body, inferior to Radial Groove
Lateral Head: Posterior aspect of Humeral Body, superior to Radial Groove
Olecranon of Ulna and Antebrachial Fascia
Extend Forearm, Long Head resists dislocation of Shoulder
Radial N.
Anconeus M.
Lateral Humeral Epicondyle
Lateral Aspect of Olecranon
With Triceps Brachii M., Extends Forearm, Stabilizes Elbow Joint
Radial N.
Pronator Teres M. (Superficial)
Humeral Head: Medial Humeral Epicondyle
Ulnar Head: Coronoid Process of Ulna
Lateral aspect of Radius
Pronate and Flex Forearm
Median N.
Flexor Carpi Radialis M. (Superficial)
Medial Humeral Epicondyle
Ventral aspect of Base of 2nd Metacarptal
Flex Forearm, Flex and Abduct Hand at the Wrist
Median N.
Palmaris Longus M. (Superficial)
Medial Humeral Epicondyle
Palmar Aponeurosis, Flexor Retinaculum
Flex Forearm, Flex Hand and Tenses Palmar Aponeurosis
Median N.
Flexor Carpi Ulnaris M. (Superficial)
Humeral Head: Medial Humeral Epicondyle
Ulnar Head: Olecranon and Posterior Ulna
Pisiform, Hook of the Hamate, and Base of the 5th Metacarpal
Flex Forearm, Flex and Adduct Hand at the Wrist
Ulnar N.
Flexor Digitorum Superficialis M. (Intermediate)
Humeroulnar Head: Medial Humeral Epicondyle & Coronoid Process of Ulna
Radial Head: Superior half of anterior aspect of Radius
Bifed insertion on Intermediate Phalanges of Digits 2-5
Flex Forearm, Flex Hand at Wrist, Flex Proximal and Intermediate Phalanges of Digits 2-5 at MCP and PIP Joints, Respectively
Median N.
Flexor Digitorum Profundus M. (Deep)
Proximal Ulna and Interosseous Membrane
Ventral Aspect of Bases of Distal Phalanges of Digits 2-5
Flex Hand at Wrist, Flex all Phalanges of Digits 2-5 at MCP, PIP, and DIP joints
Lateral Part: Anterior Interosseous N. (of Medial N.)
Medial Part: Ulnar N.
Flexor Pollicis Longus M. (Deep)
Anterior aspect of Radius and Interosseous Membrane
Ventral aspect of Base of Distal Phalanx of Pollux
Flex Hand, Flex and Abduct 1st Metacarpal at 1st CMC Joint, Flex both phalanges of Pollux at Intercarpal Joint
Anterior Interosseous N. (of Median N.)
Pronator Quadratus M. (Deep)
Anterior aspect of Distal Ulna
Anterior Aspect of Distal Radius
Pronate Forearm, deep fibers hold Ulna and Radius together
Anterior Interosseous N. (of Median N.)
Brachioradialis M. (Superficial)
Lateral Humeral Supracondylar Ridge
Lateral Aspect of Distal Radius
Flex Forearm (most force when Forearm is Midpronated)
Radial N.
Extensor Carpi Radialis Longus M. (Superficial)
Lateral Humeral Supracondylar Ridge
Dorsal aspect of Base of 2nd Metacarpal
Extend and Abduct Hand at Wrist
Radial N.
Extensor Carpi Radialis Brevis M. (Superficial)
Lateral Humeral Epicondyle
Dorsal aspect of Base of 3rd Metacarpal
Extend and Abduct Hand at Wrist
Deep Radial N.
Extensor Digitorum M. (Superficial)
Lateral Humeral Epicondyle
Extensor Expansions of Digits 2-5
Extend Hand at the Wrist, extend all Phalanges of Digits 2-5 at MCP, PIP, and DIP Joints
Posterior Interosseous N.
Extensor Digiti Minimi M. (Superficial)
Lateral Humeral Epicondyle
Extensor Expansion of Digit 5
Extend all phalanges of Digit 5 at MCP, PIP, and DIP joints
Posterior Interosseous N.
Extensor Carpi Ulnaris M. (Superficial)
Lateral Humeral Epicondyle
Dorsal Aspect of Base of 5th Metacarpal
Extend and Adduct Hand at Wrist
Posterior Interosseous N.
Supinator M. (Deep)
Lateral Humeral Epicondyle, Radial Collateral L. of Elbow, Annular L. of Proximal Radioulnar Joint, Supinator Crest, and Supinator Fossa of the Ulna
Proximal Aspect of Radial Body
Supinate Forearm
Deep Radial N.
Extensor Indicis M. (Deep)
Posterior aspect of distal Ulna and Interosseous Membrane
Extensor Expansion of Digit 2
Extend Hand at Wrist, Extend 2nd Digit
Posterior Interosseous N.
Abductor Pollicis Longus M. (Outcropping of Deep)
Posterior aspect of proximal Ulna, Radius, and Interosseous Membrane
Base of 1st Metacarpal
Abduct Hand at Wrist, Abduct Pollux at CMC Joint
Posterior Interosseous N.
Extensor Pollicis Longus M. (Outcropping of Deep)
Posterior aspect of Ulna and Interosseous Membrane
Dorsal aspect of the Base of the Distal Phalanx of the Pollux
Abduct Hand at Wrist, Extend 1st Metacarpal, Proximal and Distal Phalanges of Pollux at CMC, MCP, and IP Joints
Posterior Interosseous N.
Extensor Pollicis Brevis M. (Outcropping of Deep)
Posterior aspect of Radius and Interosseous Membrane
Dorsal aspect of Base of Proximal Phalanx of Pollux
Abduct hand, Extend 1st Metacarpal and Proximal Phalanges of Pollux at CMC and MCP joints
Posterior Interosseous Joints
Abductor Pollicis Brevis M. (Thenar)
Tubercles of Scaphoid and Trapezium bones and Flexor Retinaculum
Lateral aspect of Base of Proximal Phalanx of Pollux
Abduct Pollux, aids in Opposition
Recurrent Branch of Median N.
Opponens Pollicis M. (Thenar)
Tubercles of Scaphoid and Trapezium bones and Flexor Retinaculum
Lateral aspect of 1st Metacarpal
Oppose Pollux
Recurrent Branch of Median N.
Flexor Pollicis Brevis M. (Thenar)
Superficial and Deep Head
Tubercles of the Scaphoid and Trapezium bones and Flexor Retinaculum
Lateral aspect of Base of Proximal Phalanx of Pollux
Flex 1st Metacarpal and Proximal Phalanges of Pollux at CMC and MCP Joints
Superficial Head: Recurrent Branch of Median N.
Deep Head: Deep Ulnar N.
Adductor Pollicis M. (Thenar)
Oblique and Transverse Heads
Capitate and Bases of 2nd and 3rd Metacarpal Bones
Anterior Aspect of Body of 3rd Metacarpal Bones
Medial aspect of Proximal Phalanx of Pollux
Adduct Pollux
Deep Ulnar N.
Abductor Digiti Minimi M. (Hypothenar)
Pisiform Bone
Medial aspect of Base of Proximal Phalanx of 5th Digit
Abduct 5th digit
Deep Ulnar N.
Flexor Digiti Minimi M. (Hypothenar)
Hook of Hamate bone and Flexor Retinaculm
Medial aspect of Base of Proximal Phalanx of 5th Digit
Flex Proximal Phalanx of 5th Digit
Deep Ulnar N.
Opponens Digiti Minimi M. (Hypothenar)
Hook of Hamate bone and Flexor Retinaculum
Medial Aspect of 5th Metacarpal
Oppose 5th Digit
Deep Ulnar N.
1st and 2nd Lumbrical M. (Intermediate)
Lateral side of lateral 2 FDP tendons as Unipennate muscles
Radial aspect of Extensor Expansions of 2nd and 3rd Digits
Flex Proximal Phalanges of 2nd and 3rd Digits at MCP Joint, Extend Intermediate and Distal Phalanges of 2nd and 3rd Digits by tightening extensor expansion
Median N.
3rd and 4th Lumbrical M. (Intermediate)
Between medial 3 FDP tendons as Bipennate muscles
Radial aspect of the Extensor Expansions of 4th and 5th Digits
Flex Proximal Phalanges of 4th and 5th Digits at MCP joint, Extend Intermediate and Distal Phalanges of the 4th and 5th Digits by tightening extensor expansion
Deep Ulnar N.
Dorsal Interossei M. (1-4) (DAB)
Adjacent sides of two Metacarpals as Bipennate muscles
Bases of Proximal Phalanges and Extensor Expansion of Digits 2-4
Abduct Digits 2-4, flex Proximal Phalanges at MCP Joint, Extend Intermediate and Distal Phalanges by tightening extensor expansion
Deep Ulnar N.
Palmar Interossei M. (1-3) (PAD)
Palmar aspect of 2nd, 4th, and 5th Metacarpal bones
Bases of Proximal Phalanges and Extensor Expansions 2nd, 4th, and 5th Digits
Adduct 2nd, 4th, and 5th Digits, flex Proximal Phalanges of 2nd, 4th, and 5th digits at MCP joint, Extend Intermediate and Distal Phalanges of 2nd, 4th, and 5th Digits by tightening extensor expansion
Deep Ulnar N.
