UE: Myology Flashcards
Pectoralis Major M.
Origin (4)
Insertion
Action on Humerus (4) & Scapula (2)
Nerve
Origin
Clavicular Head: Clavical (medial 1/2)
Sternocostal Head: Anterior Surface of Sternum
Aponeurosis External Abdominal Oblique
Costal Cartilages 1-6
Insertion
Lateral portion of Intertubercular Groove
Action
ADuct Humerus
Mediall rotate humerus
Flex Humerus
Extend humerus from a Flex state
Protract Scpula
Depress Scapula
Nerve
Lateral and Medial Pectoral N.
Pectoralis Minor
Origin
Insertion
Action
Nerve
O: Medial Aspect of Ribs 3-5
I: Coracoid Process of Scapula
A: Stabilize scapula through protracting and depressing is against thoracic wall
N: Medial Pectoral N.
Subclavius M.
Origin
Insertion
Action
Nerve
O: 1st Rib and 1st costal cartilage
I: Inferior aspect of Clavical
A: Position and Depress clavical
N: Subclavian N (Nerve to Subclavius C5-C6)
Serratus Anterior M.
Origin
Insertion
Action
Nerve
O: Lateral External surface of ribs 1-8
I: Anterior and medial surface of Scapula
A: Protract Scapula and Rotate glenoid cavity superiorly
N: Long Thoracic N.
Winging of the scapula is when the scapula pulls away from the thoracic wall, so that abducting the upper limb beyond horizontal difficult. Damage to what nerve damages what muscle that causes “winging of the scapula?
Long Thoracic N.
Serratus Anterior M.
Deltoid M.
Origin (3)
Insertion
Action (5)- based on muscle portion
Nerve
O: Lateral 1/3 Clavical, Scapular Spine, Acromion
I: Deltoid Tuberosity of Humerus
Action
Anterior: Flex and Medially rotate humerus
Medial: ABduct the humerus
Posterior: Extend and Laterally rotate
Nerve
Axillary N.
Subscapularis M.
Origin
Insertion
Action (2)
Nerve
Origin
Subscapular fossa
Insertion
Lesser tubercle of Humerus
Action
Medially rotate and ADduct humerus
Nerve
Upper and Lower Subscapular N.
Supraspinatus M.
Origin
Insertion
Action
Nerve
Origin
Supraspinous Fossa
Insertion
Greater Tubercle of Humerus
Action
ABduct humerus
Nerve
Suprascapular N.
Infraspinatus M.
Origin
Insertion
Action
Nerve
Origin
Infraspinous Fossa
Insertion
Greater Tubercle of Humerus
Action
Laterally Rotate the Humerus
Nerve
Suprascapular N.
List all of the muscles of the Rotator cuff. Note that each of these holds the humeral head in the glenoid cavity
Subscapularis M.
Supraspinatus M.
Infraspinatus M.
Teres Minor M.
Teres Major M.
Origin
Insertion
Action
Nerve
Origin
Posterior aspect of Inferior Angle of Scapula
Insertion
Medial edge of Intertubercular Groove
Action
ADduct and Medially rotate humerus
Nerve
Lower Subscapular N.
Biceps Brachii M.
Origin
Insertion (2)
Action (3)
Nerve
Origin
Long Head: Supraglenoid Tubercle of the Scapula
Short Head: Coracoid Process of the Scapula
Insertion
Radial tuberosity
Antebrachial fascia as bicipital aponeurosis
Action
Flex Humerus
Supinate
Short head resists dislocation of the shoulder
Nerve
Musculocutaneous N.
What is the Popeye Deformity?
Long Head of the Biceps Tendon dislocates from intertubercular Groove or seperates entirely from the supraglenoid tubercle causing the muscle to ball up in the arm
Caused by repetitive motion
Coracobrachialis M.
Origin
Insertion
Action (2)
Nerve
Origin
Coracoid process of Scapula
Insertion
Humeral body (medial aspect)
Action
Flex and ADduct Humerus
Nerve
Musculocutaneous N.
Brachialis M.
Origin
Insertion (2)
Action
Nerve
Origin
Humeral Body (distal half of anterior side)
Insertion
Ulnar Tuberosity and Coronoid Process
Action
Flex the forearm
Nerve
Musculocutaneous N.
Triceps Brachii M.
Origin (3)
Insertion (2)
Action
Nerve
Which head of the triceps resists dislocation of the shoulder
Origin
Long Head: Infraglenoid Tubercle of Scapula
Medial Head: Humeral body Inferior to Radial groove
Lateral Head: Humeral body Superior to Radial Groove
Insertion
Olecranon
Antebrachial Fascia
Action
Extend forearm
Nerve
Radial N.
Long Head of Triceps Brachii resists shoulder dislocation with the long head of the biceps brachii
Anconeus M.
Origin
Insertion
Action (2)
Nerve
Origin
Lateral Humeral Epiconyle
Insertion
Lateral Aspect of Olecranon
Action
Extend forearm
Stabilize Elbow joint
Nerve
Radial N.
What makes up the Triangular Space?
What is found in the space?
Teres Minor
Teres Major
Long Head of Triceps Brachii M.
Circumflex Scapular A. and V.
What makes up the Quadrangular Space?
What is found in the space?
Teres Major and Minor M.
Long and Lateral Head of Triceps Brachii. M
Posterior Humeral Circumflex A and V
Axillary N.
What makes up the Triangular Interval?
What is found in the interval?
Teres Major M.
Long and Lateral Head of Triceps Brachii M.
Radial N.
Deep Brachial A. and V.
What is the only tendon of the flexor muscles that does not go through the carpal tunnel?
Palmaris Longus M.
What are the flexor muscles in each layer of the forearm?
Superficial (4)
Middle (1)
Deep (3)
Superficial
Pronator Teres M.
Flexor Carpi Radialis M.
Palmaris Longus M.
Flexor Carpi Ulnaris M,
Intermediate
Flexor Digitorum Superficialis M.
Deep
Flexor Digitorum Profundus M.
Flexor Pollicis Longus M.
Pronator Quadratus
What are the only two flexor muscles of the forearm that are innervated by the Ulnar N. and NOT the median N.?
Flexor Carpi Ulnaris M.
Flexor Digitorum Profundus M. (medial half)
NOTE: the Ulnar N. is sandwiched between these muscles
Pronator Teres M.
Origin (Humeral Head and Ulnar Head)
Insertion
Action (2)
Nerve
Origin
Humeral Head: Medial Humeral Epicondyle
Ulnar Head: Coronoid Process of the Ulna
Insertion
Radius (lateral aspect)
Action
Pronate Forearm
Flex Forearm
Nerve
Median N.
Flexor Carpi Radialis M.
Origin
Insertion
Action (3)
Nerve
Origin
Medial Humeral Epicondyle
Insertion
Base of 2nd Metacarpal
ACtion
Flex Forearm
Flex Hand at wrist
ABduct hand at wrist
Nerve
Median N.
Palmaris Longus M.
Origin
Insertion (2)
Action
Nerve
Origin
Medial Humeral Epicondyle
Insertion
Palmar Aponeurosis
Flexor Retinaculum
Action
Flex Forearm
Flex Hand
Tense Palmar Aponeurosis
Nerve
Median N.
Flexor Carpi Ulnaris M.
Origin (Humeral & Ulnar Head)
Insertion
Action (3)
Nerve
Origin
Humeral Head: Medial Humeral Epicondyle
Ulnar Head: Olecranon and Posterior Ulna
Insertion
Pisiform, Hook of Hamate
Base of 5th metacarpal
Action
Flex Forearm
ADduct Wrist
Flex Hand
Nerve
Ulnar N.
Flexor Pollicis Longus M.
Origin
Insertion
Action
Nerve
Origin
Radius
Interosseous Membrane
Insertion
Base of Distal Phalanx of Pollux
Action
Flex Hand
Flex and ABduct 1st metacarpal @ carpometacarpal
Nerve
Anterior Interosseous N. (Median N.)
Pronator Quadratus M.
Origin
Insertion
Action
Nerve
Origin
Ulna
Insertion
Radius
Action
Pronate Forarm
Nerve
Anterior Interosseous N. (of Median N.)
Brachioradialis M.
Origin
Lateral Humeral Supracondylar Ridge
Insertion
Distal Radius (lateral side)
Action
Flex forearm (most force during midpronation)
Nerve
Radial N.
Extensor Carpi Radialis Longus M.
Origin
Lateral Humeral Supracondylar Ridge
Insertion
Base of 2nd metacarpal
Action
Extend and ABduct Hand at the Wrist
Nerve
Radial N.
Extensor Carpi Radialis Brevis M.
Origin
Insertion
Action
Nerve
Origin
Lateral Humeral Epicondyle
Insertion
Base of 3rd Metacarpal
Action
Extend
ABduct wrist
Nerve
Deep Radial N.
Extensor Digitorum M.
Origin
Insertion
Action
Nerve
Origin
Lateral Humeral Epicondyle
Insertion
Extensor Expansions of Digits 2-5
Action
Extend Hand at Wrist
Extend all phalanges of digits 2-5 at each joint
Nerve
Posterior Interosseous N.
Extensor Digiti Minimi M.
Origin
Insertion
Action
Nerve
Origin
Lateral Humeral Epicondyle
Insertion
Extensor Expansion of Digit 5
Action
Extend all joints of Digit 5
Nerve
Posterior Interosseous N.
Extensor Carpi Ulnaris M.
Origin
Insertion
Action
Nerve
Origin
Lateral Humeral Epicondyle
Insertion
Base of 5th Metacarpal
Action
EXtend hand
ADduct Hand
(active during fist clenching)
Nerve
Posterior Interosseous N.
Whats the difference between Tennis Elbow and Golfer’s Elbow?
Tennis Elbow
Also called Lateral Epicondylitis
Golfers Elbow
Medial Epicondylitis
Supinator M.
Origin
Lateral Humeral Epicondyle
Radial Collateral L.
Annular L.
Supinator Crest
Supinator Fossa
Insertion
Radial Body
Action
Supinate Forearm
Nerve
Deep Radial N.
Extensor Indicis M.
Origin
Distal Ulna
Interosseous Membrane
Insertion
Extensor Expansion of Digit 2
Action
Extend Hand
Extend 2nd digit
Nerve
Posterior Interosseous N.
What are the outcropping muscles of the deep layer of extensors?
Which of these inserts at the base of the 1st metacarpal, and not the dorsal aspect of the base of the proximal phalanx?
What nerve innervates these muscles?
ABductor Pollicis Longus M.
Extensor Pollicis Brevis M.
Extensor Pollicis Longus M.
ABductor Pollicis Longus M.
Posterior Interosseous N.
What muscles define each of the borders of the anatomical snuff box?
Anterior (Lateral)
Medial (Posterior)
What are the contents of the Anatomical Snuff box?
Anterior/Lateral: Extensor and ABductor Pollicis Longus M.
Medial: Extensor Pollicis Brevis M.
Contents
Radial A.
Superficial Radial N.
Injury to what nerve could lead to complication in the action of opposing the thumb?
Median N.
What are the Thenar Eminance muscles?
Which of these muscles is innervated by the Recurrent Branch of Median N.?
Which of these muscles is innervated by the Deep Ulnar N. ?
Muscles of Thenar Eminance
ABductor Pollicis Brevis M.
Opponens Pollicis M.
Flexor Pollicis Brevis M.
ADductor Pollicis M.
Recurrent Branch of Median N.
ABductor Pollicis Brevis M.
Opponens Pollicis M.
Deep Ulnar N.
ADductor Pollicis M.
Flexor Pollicis BRevis M.
ABductor Pollicis Brevis M., Opponens Pollicis M., Flexor Pollicis Brevis M. all originate from what location within the Thenar Eminance?
ADductor Pollicis Brevis M. originates from what location within the Thenar Eminance?
Tubercles of Scaphoid and Trapezium and Flexor Retinaculum
(Inserts on Lateral aspect)
ADuctor Pollicis Brevis M.
Capitate and Bases of 2nd and 3rd metacarpals
(inserts on medial aspect)
All of the following muscles of the Hypothenar Eminance originate from the hook of hamate bone and flexor retinaculum, EXCEPT?
Where does it originate?
A. ABductor Digiti Minimi M.
B. Flexor Digiti Minimi Brevis M.
C. Opponens Digiti Minimi M.
ABductor Digiti Minimi M.
Originates off the Pisiform B.
All of the muscles that are found in the hypothenar eminance are innervated by what nerve?
ABductor Digiti Minimi M.
Flexor Digiti Minimi Brevis M.
Opponens Digiti Minimi M.
Deep Ulnar N.
T/F: Lumbricals, Dorsal Interossei M. (DAB), Palmar Interossei M. (PAD) all insert on the extensor expansions of digits
True
All of the following Intermediate muscles of the hand are innervated by the Deep Ulnar N., except for whcih of the following that is innervated by Median N. ?
A. 1st and 2nd Lumbricals
B. 3rd and 4th Lumbricals
C. DABs
D. PADs
1st and 2nd Lumbricals
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