Upper Limb Flashcards
Pectoralis major attachments
Clavicular head- anterior medial clavicle
Sternocostal head- anterior sternum, superior 6 costal cartilages
Intertubercular sulcus humerus
Pectoralis major function
Adduction and medial rotation arm
Clavicular head flexes arm
Pectoralis major innervation
Lateral and medial Pectoralis nerves
Pectoralis minor attachments
3-5th anterior ribs
Coracoid process scapula
Pectoralis minor function
Stabilises scapula (pulls anteroinferiorly)
Pectoralis minor innervation
Medial pectoral nerve
Serratus anterior attachments
Lateral aspects rib 1-8
Costal surface medial scapula
Serratus anterior function
Rotates scapula during arm flexion, holds scapula against ribcage
Serratus anterior innervation
Long thoracic nerve
Long thoracic nerve injury
Serratus anterior no longer holds scapula against rib cage causing winged scapula
Trapezius attachments
Skull, nuchal ligament and spinous processes C7-T12
Clavicle, acromion, scapula spine
Trapezius function
Upper fibres elevate and rotate scapula during arm abduction
Middle fibres retract scapula
Lower fibres pull scapula inferiorly
Trapezius innervation
Motor from accessory nerve
Proprioception from C3/ C4
How to test accessory nerve
Usually damaged iatrogenically, if damaged cannot shrug shoulders
Latissimus dorsi attachments
Spinous process T7-T12, iliac crest, thoracolumbar fascia and inferior 3 ribs
Intertubercular sulcus of humerus
Latissimus dorsi function
Extends, adducts and medially rotates arm
Latissimus dorsi innervation
Thoracodorsal nerve
Levator scapulae attachments
Transverse processe C1-C4
Medial border scapula
Levator scapulae function
Elevates scapula
Levator scapulae innervation
Dorsal scapula nerve
Rhomboid major attachments
Spinous processes T2-T5
Medial border scapula
Rhomboid major function
Retracts and rotates scapula
Rhomboid major innervation
Dorsal scapula nerve
Rhomboid minor attachments
Spinous processes C7-T1
Medial scapula
Rhomboid minor function
Retracts and rotates scapula
Rhomboid minor innervation
Dorsal scapula nerve
Deltoid attachments
Lateral third clavicle, acromion, spine of scapula
Deltoid tuberosity on lateral aspect humerus
Deltoid function
Anterior fibres- flexion and medial rotation
Middle fibres- abduction arm (not first 15 degrees)
Posterior fibres- extension and lateral rotation
Deltoid innervation
Axillary nerve
Teres major attachments
Posterior surface inferior angle of scapula
Medial lip of Intertubercular groove humerus
Teres major function
Adduction and extensions shoulder and medial rotation arm
Teres major innervation
Lower subscapular nerve
Name the rotator cuff muscles
Supraspinatus
Infraspinatus
Subscapularis
Teres minor
Supraspinatus attachments
Supraspinous fossa scapula
Greater tubercle humerus
Supraspinatus function
First 15 degree arm abduction
Supraspinatus innervations
Suprascapular nerve
Infraspinatus attachments
Infraspinous fossa scapula
Greater tubercle humerus
Infraspinatus function
Lateral rotation arm
Infraspinatus innervation
Suprascapular nerve
Subscapularis attachments
Subscapular fossa (costal surface)
Lesser tubercle humerus
Subscapularis function
Medially rotates arm
Subscapularis innervation
Upper and lower subscapular nerves
Teres minor attachments
Posterior surface scapula next to lateral border
Greater tubercle humerus
Teres minor function
Lateral rotation arm
Teres minor innervation
Axillary nerve
Biceps brachii attachments
Long head- supraglenoid tubercle scapula
Short head- coracoid process scapula
Radial tuberosity and fascia of forearm
Biceps brachii function
Supination forearm, elbow flexion and shoulder flexion
Biceps brachii innervation
Musculocutaneous nerve
Coracobrachialis attachments
Coracoid process
Medial numeral shaft
Coracobrachialis function
Shoulder flexion and some Adduction
Coracobrachialis innervation
Musculocutaneous nerve
Brachialis attachments
Medial and lateral humerus shaft
Ulnar tuberosity
Brachialis function
Elbow flexion
Brachialis innervation
Musculocutaneous nerve (less so radial nerve)
Triceps brachii attachments
Long head- infraglenoid tubercle scapula
Lateral head- humerus (sup to radial groove)
Medial head- humerus (inferior to radial groove)
Olecranon ulna
Triceps brachii function
Elbow extension
Triceps brachii innervation
Radial nerve
Name the muscles in the superficial compartment of the anterior forearm and the tendon from which they arise
Flexor carpi ulnaris
Palmaris longus
Flexor carpi radialis
Pronator teres
Common tendon arising from medial epicondyle of humerus
Flexor carpi ulnaris attachments
Medial epicondyle humerus and olecranon of ulna
Pisiform, hook of hamate, base of 5th metacarpal
Flexor carpi ulnaris function
Flexion and Adduction wrist
Flexor carpi ulnaris innervation
Ulnar nerve
Palmaris longus attachments
Medial epicondyle humerus
Flexor retinaculum wrist
Palmaris longus function
Wrist flexion
Palmaris longus innervation
Median nerve
Flexor carpi radialis attachments
Medial epicondyle humerus
Base of second and third metacarpals
Flexor carpi radialis function
Flexion and abduction wrist
Flexor carpi radialis innervation
Median nerve
Pronator teres attachments
Medial epicondyle humerus and coronoid process ulna
Mid shaft of radius
Pronator teres function
Pronation forearm
Pronator teres innervation
Median nerve
Flexor digitorum superficialis attachments
2 heads- medial epicondyle humerus, radius
Splits into 4 tendons which travel through carpal tunnel and attach to base of middle phalanx of 4 fingers
Flexor digitorum superficialis function
Metacarpophalangeal flexion, proximal interphalangeal flexion,
Wrist flexion
Flexor digitorum superficialis innervation
Median nerve
Flexor digitorum profundus attachments
Ulna and interosseous membrane
Forms 4 tendons which pass through carpal tunnel and attach to distal phalanges of 4 fingers
Flexor digitorum profundus innervation
Medial half ulnar nerve, lateral half anterior interosseous branch of median nerve
Flexor pollicisis longus attachments
Anterior radius and interosseous membrane
Distal phalanx thumb
Flexor pollicisis longus function
Flexion of interphalangeal and metacarpophalangeal joint thumb
Flexor pollicisis longus innervation
Median nerve
Pronator quadratus attachments
Anterior ulna
Anterior radius
Pronator quadratus function
Forearm pronation
Pronator quadratus innervation
Median nerve (anterior interosseous branch)
Which 4 muscles share a common tendon at the lateral epicondyle of the humerus
Extensor carpi radialis brevi
Extensor digitorum
Extensor carpi ulnaris
Extensor digi minimi
Brachioradialis attachments
Proximal lateral supracondylar ridge of humerus
Distal radius
Brachioradialis function
Elbow flexion, some supination at proximal radioulnar joint
Brachioradialis innervation
Radial nerve
Extensor carpi radialis longus and brevis attachments
ECRL Lateral supracondylar ridge of humerus
ECRB lateral epicondyle
Metacarpal 2 and 3
Extensor carpi radialis longus and brevis function
Wrist extension and abduction
Extensor carpi radialis longus and brevis innervation
Radial nerve
Extensor digitorum communis attachments
Lateral epicondyle humerus,
Splits into 4 tendons and inserts into extensor good of each finger
Extensor digitorum communis function
Extension interphalangeal and metacarpophalangeal joints
Extensor digitorum communis innervation
Radial nerve (deep branch)
Extensor carpi ulnaris attachments
Lateral epicondyle humerus
Base of fifth metacarpal
Extensor carpi ulnaris function
Wrist extension and adduction
Extensor carpi ulnaris innervation
Deep branch radial nerve
Supinator attachments
Lateral epicondyle humerus and posterior surface ulna
Posterior radius
Supinator function
Forearm supination
Supinator innervation
Deep branch radial nerve
Abductor pollicis longus attachments
Interosseous membrane and posterior radius/ ulna
Lateral first metacarpal
Abductor pollicis longus function
Thumb abduction
Abductor pollicis longus innervation
Posterior interosseous branch of radius nerve
Extensor pollicis brevis attachments
Posterior radius and interosseous membrane
Proximal phalanx thumb
Extensor pollicis brevis function
Extends metacarpophalangeal and carpometacarpal joints thumb
Extensor pollicis brevis innervation
Posterior interosseous branch of radius nerve
Extensor pollicis longus attachments
Posterior ulna and interosseous membrane
Distal phalanx thumb
Extensor pollicis longus function
Extends all thumb joints
Extensor pollicis longus innervation
Radial nerve posterior interosseous branch
Extensor indicis proprius attachments
Posterior ulna and interosseous membrane
Extensor hood of index finger
Extensor indicis proprius function
Extends index finger
Extensor indicis proprius innervation
Posterior interosseous branch of radius nerve
Radial nerve injury presentation
Often caused by damage in axilla (humeral dislocation) or damage in radial groove (humeral shaft fracture)
Unopposed wrist flexion causes wrist drop
what is the mnemonic for remembering carpal bones
some lovers try positions that they can’t handle
name the carpal bones
scaphoid, lunate, triquetrum, pisiform, trapezium, trapeziod, capitate, hamate
which 2 veins form from the dorsal venoud network of the hand
cephalic vein laterally and basilic vein medially
which vein do the cephalic and brachial veins drain into
axillary vein
which muscle make up superficial posterior shoulder muscles
trapezius and latissimus dorsi
which muscle make up deep posterior shoulder muscles
rhomboids and levetor scapulae
what structures surround the apex of the axilla forming the cervico axillary canal through which structures enter the axilla
first rib, clavicle, scapula
what forms the anterior wall of the axilla
pectoralis major and minor
what forms the posterior wall of the axilla
scapula and subscapularis. inferiorly teres major and latissimus dorsi
what forms the medial wall of the axilla
thoracic wall with overlying serratus anterior
what forms the lateral wall of the axilla
intertubercular sulcus humerus
Biceps reflex tests which nerve and spinal cord segments
musculocutaneous nerve, C5-C6
what forms the superior margin of the cubital fossa
an imaginary line between the lateral and medial epicondyle
what forms the medial margin of the cubital fossa
pronator teres
what forms the lateral margin of the cubital fossa
brachioradialis
what forms the floor and roof of the cubital fossa
floor brachialis and supinator
roof brachial and antebrachial fascia
what is found in the cubital fossa
brachial artery splitting into ulnar and radial artery
deep veins
biceps brachii tendon
median nerve
radial nerve (splits into superficial and deep)
which muscle forms the intermediate layer of flexors/ pronators of the forearm
flexor digitorum superficialis
which muscles form the deep layer of flexors/ pronators of the forearm
flexor digitorum profundus
flexor pollicis longus
pronator quadratus