Appendicular Skeletal Muscles Flashcards
Rotator cuff
Infraspinatus
O: infraspinous fossa I: greater tubercle of the humerus (middle facet) A: lateral rotation of the arm @ GH jt N: suprascapular nerve A: suprascapular artery
Rotator cuff muscles.
Supraspinatus
O: supraspinous fossa I: greater tubercle of humerus A: abduction of arm @ GH jt N: suprascapular nerve A: suprascapular artery
Rotator cuff
Teres minor
O: superior middle of lateral border of scapula
I: greater tubercle of humerus (inferior facet)
A: adduction of arm @ GH jt
N: axillary nerve
A: circumflex scapular & circumflex humeral artery
Rotator Cuff
Subscapularis
O: subspinous fossa of scapula I: lesser tubercle of humerus A: medial rotation of arm @ GH jt N: subscapular nerve A: Circumflex scapular dorsal and supra scapular artery
Anterior Forearm
Superficial
Flexor carpi ulnaris
O: 2 heads: medial epicondyle via the CFT & proximal ulna
I: pisiform, hook of hamate & metacarpal #5
A: flexion of hand @ wrist, ulnar deviates, elbow flexion
N: ulnar nerve
A: ulnar artery
HAND Central Compartment
Dorsal interossei manus
How many are there?
There are 4 dorsal interossei manus.
O: Bodies of metacarpals 1-5. (All bi-pennate)
I: Base of proximal phalanx of fingers 2,3 & 4
A: Abduction of digits 2,3 & 4 @ MCP jt DABB
N: Ulnar nerve
A: Radial and ulnar artery
Teres major
O: inferior portion of lateralborder of scapula
I: medial lip of the bicipital groove of the humerus.
A: medial rotation, adduction, extension of arm @ GH jt.
N: lower subscapular nerve
A: circumflex scapular artery
Deltoids
O: Anterior - lateral 1/3 of clavicle
O: Middle - acromion process
O: Inferior - spine of the scapula
I: all 3 deltoid tuberosity of the humerus
A: anterior - abduction, flexion, medial rotation, horizontal adduction @GH jt
A: middle - abduction @ GH jt
A: inferior - abduction, lateral rotation, horizontal abduction @ GH jt
N: axillary nerve
A: circumflex artery
Superficial posterior forearm
Extensor carpi radialis longus
O: lateral supracondylar ridge I: posterior base of metacarpal #2 A: extends hand @ wrist, radial deviation N: radial nerve A: brachial and radial artery
Biceps brachii
O: long head: supragleniod tubercle
short head: corocoid process of scapula
I: radial tuberosity, bicipital aponeurosis
A: flexion of arm @ GH jt & elbow jt, supination of forearm @ radioulnar jt
N: Musculocutaneous nerve
A: brachial artery
Brachialis
The main elbow flexor
O: distal 1/2 anterior shaft of humerus I: ulnar tuberosity & coronoid process A: flexes arm @ elbow jt N: musculocutaneous nerve A: brachial artery
Coracobrachialis
Uppercut muscle
O: corocoid process of the scapula I: middle 1/3 portion of humerus A: Flexion & adduction of arm @ GH jt N: musculocutaneous nerve A: brachial artery
Brachioradialis
Beer drinking muscle
O: lateral supracondylar ridge I: styloid process of the radius A: flexion @ elbow jt, Pronates & supinates forearm @ radioulnar jt N: radial nerve A: brachial & radial artery
Pronator teres
O: humeral head: medial epicondyle via CFT, Ulnar head: coronoid coronoid process of the ulna
I: lateral aspect of radius
A: Pronates forearm @ proximal radioulnar jt, flexes forearm at elbow jt
N: median nerve
A: ulnar & radial artery
Anterior superficial forearm
Flexor carpi radialis
O: medial epicondyle via the CFT I: base of #2 & 3 metacarpal A: flexes hand @ wrist jt, radial deviates hand, flexes arm @ elbow jt N: median nerve A: radial and ulnar artery
Triceps brachii
O: long head - infraglenoid tubercle
Lateral head - proximal 1/2 posterior humerus
Medial head - distal 1/2 of shaft of humerus
I: all 3 insert into olecranon process
A: extension of elbow jt, long head: extention of arm @ GH jt
N: Radial nerve
A: deep brachial artery
Anterior superficial forearm
Flexor carpi ulnaris
O: 2 heads - medial epicondyle via the CFT, proximal ulna
I: pisiform, hook of hamate, base of metacarpal #5
A: flexes hand @ wrist joint, ulnar deviates the hand, flexes the elbow jt
N: ulnar nerve
A: ulnar artery
Anterior superficial forearm
Palmaris longus
O: Medial epicondyle via the CFT
I: palmar aponeurosis & flexor retinaculum
A: flexes hand @ wrist jt, flexes elbow jt
N: median nerve
A: ulnar artery
Posterior deep forearm
Extensor indicis
O: posterior distal 1/3 of ulna and interosseous membrane
I: dorsal side of middle and distal phalanges of digit 2 via the dorsal digital expansion
A: extends hand @ wrist jt, extends index finger @ MCP, PIP & DIP
N: radial nerve
A: posterior interosseous artery
Posterior forearm
Supinator
O: lateral epicondyle & supinator crest of ulna.
I: proximal 1/3 of radius, posterior, lateral and anterior surfaces
A: supination of the forearm @ distal radioulnar jt
N: radial nerve
A: radial & interosseous artery
Anterior deep forearm
Pronator quadratus
O: anterior distal ulna I: anterior distal radius A: pronation of forearm @ distal radioulnar jt N: median nerve A: anterior interosseous artery
Anterior deep forearm
Flexor pollicus longus
O: anterior surface of radius and interosseous membrane
I: distal phalanx of digit #1
A: flexes thumb @ CMC, MCP, PIP, flexes hand @ humeralradial jt
N: median nerve
A: radial and anterior interosseous membrane
Anterior intermediate forearm
Flexor digitorum superficialis
O: HUMERAL ULNAR HEAD: medial epicondyle via CFT & coronoid process of ulna, RADIAL HEAD: proximal 1/3 of radius
I: anterior palmar surface of middle phalange of digits 2-5
A: flexes fingers 2-5 @ MCP, PIP jt, flexes hand @ wrist jt, flexes elbow jt.
N: median nerve
A: ulnar and radial artery
Anterior deep forearm
Flexor digitorum profundus
O: medial anterior ulna and interosseous membrane.
I: palmar anterior surfaces of distal phalanges 2-5.
A: flexes phalanges 2-5 @ MCP, DIP jt, flexes hand @ wrist jt
N: median & ulnar nerve
A: radial, ulnar and interosseous artery
The Hand
Thenar
Opponens Pollicis
O: flexor retinaculum & trapezium I: 1st metacarpal (anterior and lateral surface) wraps around the outside of metacarpal. A: opposition of thumb via the CMC jt N: median (ulnar) nerve A: radial artery
Posterior Superficial Forearm
Anconeus
O: Lateral epicondyle of the humerus I: posterior proximal ulna A: extention of elbow N: radial nerve A: deep brachial, radial artery
Posterior Superficial Forearm
Extensor digiti minimi
O: lateral epicondyle of the humerus via the CET
I: middle and distal phalanges of digit #5 via the dorsal digital expansion.
A: extends hand @ wrist jt, extends phalange #5 @ MCP, PIP & DIP jt
N: radial nerve
A: posterior interosseous artery
Posterior Deep Forearm
Extensor indicis
O: Posterior distal 1/3 of ulna & interosseous membrane.
I: posterior side of middle & distal phalanges of digit #2 via the dorsal digital expansion.
A: extends index finger (digit #2) @ MCP, PIP &DIP jt. Extends hand @ wrist.
N: radial nerve
A: posterior interosseous artery
The Hand
Superficial Fascia
Palmar Brevis
O: flexor retinaculum, palmar aponeurosis
I: dermis of ulnar side of hand
A: wrinkles skin, contributes to gripping.
N: ulnar nerve
A: ulnar and radial artery
Posterior Forearm
Outcropping muscle
Extensor Pollicis Brevis
O: posterior 1/3 of radius, distal 1/3 of interosseous membrane,
I: posterior base of proximal phalange of 1st digit. (Thumb)
A: extends hand @ wrist jt. Extends thumb @ CMC & MCP jt.
N: radial nerve
A: posterior interosseous artery