Thoracic Limb Flashcards
(O) superficial pectoral - descending & transverse
first three sternebrae & median fibrous raphe
(I) superficial pectoral
greater tubercle crest of humerus
(a) superficial pectoral
adduct limb (non weight bearing) prevent abduction (weight bearing
O: first three sternebrae and median fibrous raphe
I: greater tubercle crest of humerus
(o) deep pectoral
ventral part of sternum & median fibrous raphe
(I) deep pectoral
lesser tubercle, greater tubercle via aponeurosis of humerus
(a) deep pectoral
pull trunk cranially, extend shoulder (when limb advanced/fixed)
draw limb caudally and flex shoulder (when not weight bearing)
o: ventral sternebra & median raphe
I: lesser tubercle, greater tubercle via aponeruosis
(o) cleidobrachialis, cleidocervicalis, cleidomastoideus
clavicular intersection
(I) cleidobrachialis
distal end of cranial humerus
(I) cleidocervicalis
middorsal raphe of neck
(i) cleidomastoideus
mastoid part of temporal bone
(a) brachiocephalicus
advance limb, extend shoulder, draw head and neck side to side
o: clavicular intersection
i: distal end of cranial humerus, median raphe of neck, mastoid
(o) omotransversarius
wing of atlas (not distinct)
(I) omotransversarius
acromion of scapula
(a) omotransversarius
advance limb, flex neck laterally
o: wing of atlas
I: acromion of scapula
(o) trapezius - cervical and thoracic
median fibrous raphe of neck & supraspinous ligament
(I) trapezius
spine of scapula
(a) trapezius
elevate and abduct limb
O: median raphe of neck, supraspinatus ligament
I: spine of scapula
(o) rhomboideus - capitis, cervicis, thoracis
base of skull (nuchal crest of occipital bone)
median fibrous raphe of neck
spinous process of thoracic vertebrae
(I) rhomboideus
dorsal border of scapula
(a) rhomboideus
elevate limb
draw scapula against trunk
o: median raphe of neck, nuchal crest of occipital bone, spinous process of vertebrae
I: dorsal border of scapula
(o) latissimus dorsi
thoracolumbar fascia & last few ribs
(I) latissimus dorsi
teres major tuberosity (humerus) via teres major tendon
(a) latissimus dorsi
draw limb caudally, flex shoulder (DIG!)
o: thoracolumbar fascia & last few ribs
I: teres major tuberosity of humerus
(o) serratus ventralis - cervicis and thoracic
ribs & transverse process of cervical vertebrae
(I) serratus ventralis
serrated face of scapula
(a) serratus ventralis
support trunk, depress scapula
o: ribs, transverse process of cervical vertebrae
I: serrated face of scapula
(o) deltoideus - scapular & acromial
spine & acromion of scapula
(I) deltoideus
deltoid tuberosity of humerus
(a) deltoideus
flex shoulder - nike swoosh
(o) spine and acromion of scapula
(I) deltoid tuberosity of humerus
(o) infraspinatus
infraspinous fossa
(I) infraspinatus
greater tubercle (lateral side)
(a) infraspinatus
WB: prevents medial rotation
no WB: laterally stabilizes shoulder, abduct & laterally rotate shoulder, assists other muscles in extension and flexion
(o) infraspinous fossa
(I) greater tubercle
(o) teres minor
infraglenoid tubercle and distal caudal border of scapula
(I) teres minor
teres minor tuberosity
(a) teres minor
WB: prevents medial rotation
no WB: laterally stabilizes shoulder, lateral rotation of shoulder, assist flex shoulder muscles
o: infraglenoid tubercle and distal caudal border of scapula
I: teres minor tuberosity
(o) supraspinatus
supraspinous fossa
(I) supraspinatus
greater tubercle of humerus
(a) supraspinatus
WB: prevents medial rotation
no WB: laterally stabilizes shoulder and extends shoulder
o: supraspinous fossa
I: greater tubercle of humerus
(o) subscapularis
subscapular fossa of scapula
(I) subscapularis
lesser tubercle
(a) subscapularis
WB: prevents medial rotation
no WB: laterally stabilizes shoulder, extend shoulder
o: subscapular fossa
I: lesser tubercle of humerus
(o) teres major
caudal angle & caudal border of scapula
subscapularis muscle
(I) teres major
teres major tuberosity
(a) teres major
flex shoulder
rotate limb medially
o: caudal angle/border of scapula & suscapularis muscle
I: teres major tuberosity
(o) coracobrachialis
coracoid process of scapula
(I) coracobrachialis
crest of lesser tubercle of humerus
(a) coracobrachialis
shoulder stabilizer
assist muscles in adduction/extension of shoulder
o: coracoid process of scapula
I: crest of lesser tubercle
(o) tensor fasciae antebrachii
fascia covering the lateral surface of the latissimus dorsi muscle
(I) tensor fasciae antebrachii
olecranon of ulna, in common with tendon of insertion f triceps brachii muscle
(a) tensor fasciae antebrachii
extend elbow
o: fascia covering lateral surface of latissimus dorsi
I: olecranon of ulna, common with tendon of insertion for triceps brachii muscle
(o) biceps brachii - long, lateral, medial, accessory
caudal border of scapula
tricipital line
lesser tubercle of humerus
(I) biceps brachii
olecranon
(a) biceps brachii
flex shoulder and extend elbow
o: for first, caudal border of scapula, others, tricipital line and lesser tubercle
I: olecranon of ulna
(o) anconeus
lateral supracondylar crest of humerus
lateral and medial epicondyles of humerus
(I) anconeus
proximal and lateral aspect of ulna
(a) anconeus
extend elbow
(o) lateral supracondylar crest of humerus, lateral/proximal epicondyle of humerus
(I) proximal and lateral aspect of ulna
(o) biceps brachii
supraglenoid tubercle (scapula)
(I) biceps brachii
radial & ulnar tuberosities
(a) biceps brachii
extend shoulder
flex elbow
o: supraglenoid tubercle (scapula)
I: radial & ulnar tuberosities
(o) brachialis
brachialis groove (humerus)
(I) brachialis
radial & ulnar tuberosities
(a) brachialis
flex elbow
o: brachialis groove (humerus)
I: radial & ulnar tuberosity
(o) extensor carpi radialis
lateral supracondylar crest of humerus
(I) extensor carpi radialis
metacarpal tuberosities (2 & 3)
(a) extensor carpi radialis
extend carpus
o: lateral supracondylar humerus
I: metacarpal tuberosities (2 & 3)
(o) common digital extensor
lateral epicondyle of humerus
(I) common digital extensor
extensor processes of distal phalanx of 2, 3, 4, and 5 digits
(a) common digital extensor
extend joints of 2, 3, 4 and 5
o: lateral epicondyle of humerus
I: extensor processes of distal phalanx of 2, 3, 4 and 5 digits
(o) lateral digital extensor
lateral epicondyle (humerus)
(I) lateral digital extensor
extensor process of distal phalynx digits 3, 4 & 5
proximal ends of digits 3, 4 & 5
(a) lateral digital extensor
extend joints of digits 3, 4 & 5
o: lateral epicondyle (humerus)
I: extensor process and proximal process of digits 3, 4 and 5
(o) ulnaris lateralis
lateral epicondyle (humerus)
(I) ulnaris lateralis
lateral aspect of base 5
accessory carpal bone
(a) ulnaris lateralis
abduct carpus
flex carpus
o: lateral epicondyle (humerus)
I: lateral aspect of base digit 5, accessory carpal bone
(o) supinator
lateral epicondyle (humerus)
(I) supinator
cranial aspect of proximal radius
(a) supinator
supination
(rotate antebrachium laterally so palmar surface of paw faces medially)
o: lateral epicondyle (humerus)
I: cranial aspect of proximal radius
(o) pronator teres
medial epicondyle (humerus)
(I) pronator teres
medial border of radius
(a) pronator teres
pronation
(rotate antebrachium medially so palmar surface of paw faces ground)
o: medial epicondyle (humerus)
I: medial border of radius
(o) abductor pollicis longus
distal ulna
adjacent interosseus membrane
(I) abductor pollicis longus
proximal end of metacarpal 1
(a) abductor pollicis longus
abduct digit 1
o: distal ulna, adjacent interosseus membrane
I: proximal end of metacarpal 1
(o) flexor carpi radialis
medial epicondyle (humerus) medial border of radius
(I) flexor carpi radialis
palmar surface of proximal aspect of metacarpal 2 & 3
(a) flexor carpi radialis
flex carpus
o: medial epicondyle (humerus), medial aspect of radius
I: palmar surface of proximal aspect of metacarpal 2 & 3
(o) superficial digital flexor
medial epicondyle (humerus)
(I) superficial digital flexor
palmar surface of proximal aspect of middle phalanges of digits 2, 3, 4 and 5
(a) superficial digital flexor
flex carpus
flex digits 2-5
o: medial epicondyle (humerus)
I: palmar surface proximal aspect middle phalanges of 2-5
(o) flexor carpi ulnaris
medial epicondyle (humerus) olecranon (caudal & medial aspect)
(I) flexor carpi ulnaris
accessory carpal bone
(a) flexor carpi ulnaris
flex carpus
o: medial epicondyle (humerus), olecranon
I: accessory carpal bone
(o) deep digital flexor
medial epicondyle (humerus, ulna and radius)
(I) deep digital flexor
flexor tubercle of distal phalanx of each digit
(a) deep digital flexor
flex carpus
flex digit
o: medial epicondyle (humerus, ulna, radius)
I: flexor tubercle of distal phalanx of each digit
(a) pronator quadratus
pronate the antebrachium
spans interosseus space between radius and ulna bones
interossei
four singular muscles, fleshy same shape and size
deep to deep digital flexor & cover palmar surfaces of four main metacarpal bones
tendon of each muscledivides and each tendon encompasses a sesamoid bone
