Insertions + Origins + Actions= Upper Limb Flashcards
What’s the origin, insertions, function and innervation of Pectoralis major?
Origin: clavicular head= ant surface of medial clavicle
Sternocostal head= ant surface of sternum
Insertion: intertubercular sulcus of humerus
Function: adducts and internally rotates
Lateral and medial pectoral nerves
What’s the origin, insertion, function and innervation of Pectoralis minor?
Origin: 3rd-5th ribs
Insertion: coracoid process of scapula
Function: draws scapula annteroinferiorly against thoracic wall
Medial pectoral nerve
What’s the origin, insertion, function and innervation of Serratus anterior?
Origin: Junction of 1st rib and it’s costal cartilage
Insertion: inferior surface of middle third of clavicle
Function: anchors and depresses the clavicle
Nerve to subclavius
What’s the origin, insertion, function and innervation of the Trapezius?
Origin: skull, nuchal ligament and spinous processes
Insertion: attaches to clavicle and acromium
Function: elevates the scapula and rotates it during abduction
Accessory nerve
What’s the origin, insertion, function of Latissimus Dorsi?
Origin: spinous processes of T7-T12
Insertion: intertubercular sulcus of humerus
Function: extends, adducts + internally rotates
What’s the origin, insertion, function and innervation of Levator Scapulae?
Origin: transverse processes of C1-C4
Insertion: medial border of scapula
Function: elevates scapula
What’s the origin, insertion, function and innervation of the Deltoid?
Origin: lateral third of clavicle, acromium and spine of scapula
Insertion: deltoid tuberosity on lat aspect of humerus
Function: ant fibres= Flexion and internal rot.
post fibres= extend and external rot.
middle fibres= abductor of arm
Axillary nerve
What’s the origin, insertion, function and innervation of Teres Major?
Origin: post surface of inf angle of scapula
Insertion: medial lip of intertubercular groove of humerus
Function: adducts, extends and internal rot.
Lower subscapular nerve
What’s the origin, insertion, function and innervation of Supraspinatus?
Origin: supraspinous fossa of scapula
Insertion: greater tubercle of humerus
Function: abducts arm 0-15 degrees
Suprascapular nerve
What’s the origin, insertion, function and innervation of Infraspinatus?
Origin: infraspinous fossa of scapula
Insertion: greater tubercle of humerus
Function: external rotation
Suprascapular nerve
What’s the origin, insertion, function and innervation of Subscapularis?
Origin: subscapular fossa on costal surface
Insertion: lesser tubercle of humerus
Function: internal rotation
Upper and lower subscapular nerves
What’s the origin, insertion, function and innervation of Teres minor?
Origin: post surface of scapula adjacent to its lat border
Insertion: greater tubercle of humerus
Function: external rotation of arm
Axillary nerve
What’s the origin, insertion, function and innervation of Biceps brachii?
Origin: long head= supraglenoid tubercle of scapula
short head= coracoid process of scapula
Insertion: radial tuberosity and fascia of forearm
Function: supination of forearm and flexes arm at elbow + shoulder
Musculocutaneous nerve
What’s the origin, insertion, function and innervation of Coracobrachialis?
Origin: coracoid process of scapula
Insertion: attaches the medial side of humerus shaft at level of deltoid tubercle
Function: Flexion of arm and weak adduction
Musculocutaneous nerve
What’s the origin, insertion, function and innervation of Brachialis?
Origin: medial and lateral surfaces of humerus shaft
Insertion: ulnar tuberosity
Function: Flexion at elbow
Musculocutaneous nerve
What’s the origin, insertion, function and innervation of Tricpes brachii?
Origin: long head= infraglenoid tubercle
lateral head= humerus, superior to radial groove
medial head= humerus, inferior to radial groove
Insertion: olecranon of the ulna
Function: extension of arm at elbow
What’s the origin, insertion, function and innervation of Flexor carpi unlnaris?
Origin: humeral head= medial epicondyle of humerus
ulnar head= olecranon of ulna
Insertion: pisiform bone
Function: Flexion and adduction at wrist
Ulnar nerve
What’s the origin, insertion, function and innervation of Palmaris longus?
Origin: medial epicondyle
Insertion: flexor retinaculum
Function: Flexion at wrist
Median nerve
What’s the origin, insertion, function and innervation of Flexor carpi radialis?
Origin: medial epicondyle
Insertion: to base of metacarpals II and III
What’s the origin, insertion, function and innervation of Pronator Teres?
Origin: medial epicondyle and coronoid process of ulna
Insertion: attaches laterally to the mid shaft of radius
Function: pronates forearm
Median nerve
What’s the origin, insertion, function and innervation of Flexor digitorum superficialis?
Origin: medial epicondyle of humerus and radius
Insertion: middle phalanges of four fingers
Function: flexes the MPJs and PIPJs at four fingers and flexes at wrist
Median nerve
What’s the origin, insertion, function and innervation of Flexor digitorum profundus?
Origin: ulna and associated interosseous membrane
Insertion: distal phalanges of four fingers
Function: flexes the DIPJs and flexes the MPJ at wrist
Medial half (little and ring finger) - ulnar nerve Lateral half (middle and index fingers)- median nerve
What’s the origin, insertion, function and innervation of Flexor pollicis longus?
Origin: anterior surface of the radius and surrounding interosseous membrane
Insertion: to base of distal phalanx of the thumb
Function: flexes the IPJs and MCPJs of thumb
Median nerve
What’s the origin, insertion, function and innervation of Pronator quadratus?
Origin: anterior surface of the ulna
Insertion: anterior surface of the radius
Function: pronates forearm
Median nerve
What’s the origin, insertion, function and innervation of the Brachioradialis?
Origin: proximal aspect of lateral supracondylar ridge of humerus
Insertion: distal end of radius
Function: flexes at elbow
Radial nerve
What’s the origin, insertion, function and innervation of Supinator?
Origin: humeral head= common extensor origin on lateral epicondyle
ulnar head= supinator crest on radial border of proximal shaft of ulna
Insertion: proximal radial surface of radius
Function: supinates forearm
Deep branch of radial nerve
What’s the origin, insertion, function and innervation of the aconeus muscle?
Origin: lateral epicondyle
Insertion: posterior and lateral part of olecranon
Function: extends and stabilises the elbow joint
Radial nerve
What is the origin, insertion, function and innervation of the opponens pollicis?
Origin: tubercle of trapezium
Insertion: lateral margin of metacarpal of thumb
Function: opposes thumb
Median nerve
What is the origin, insertion, function and innervation of the abductor pollicis brevis?
Origin: tubercles of scaphoid and trapezium
Insertion: lateral side of proximal phalanx of thumb
Function: abducts thumb
Median nerve
What is the origin, insertion, function and innervation of the flexor pollicis brevis?
Origin: tubercle of trapezium
Insertion: base of proximal phalanx of thumb
Function: flexes the MCPJs of thumb
Median nerve
What is the origin, insertion, function and innervation of the Lumbricals?
Origin: tendons of the FDP
Insertion: extensor hood
Function: Flexion at MCPJs and extension at IPJs
What is the origin, insertion, function and innervation of the interossei?
Origin: medial and lateral surfaces of the metacarpals
Insertion: extensor hood
Function: dorsal= abduction of MCPJs
palmar= addiction of MCPJs
Ulnar nerve
