Actions of Muscles (Thoracic Limb) Flashcards
Superficial Pectoral
adduct limb (non-weight bearing) & prevent abduction (weight-bearing)
Deep Pectoral
Supporting weight: pull trunk cranial, extend shoulder
Not supporting weight: draw limb in caudal, flex shoulder, adduct limb
Brachiocephalicus
extend shoulder & draw head/neck lateral
Sternocephalicus
draw head/neck lateral
Sternohyoideus
pull tongue/larynx caudal
Sternothyroideus
Pull tongue/larynx caudal
Omotransversarius
Advance limb or flex neck lateral
Trapezius
elevate & abduct forelimb
Rhomboideus
elevate forelimb & draw scapula against trunk
Latissimus Dorsi
draw free limb caudal
flex shoulder
Serratus Ventralis (Cervicis & Thoracis)
support trunk & depress scapula
Deltoideus
flex shoulder
Infraspinatus
extend or flex shoulder
Supraspinatus
extend & stabilize shoulder
Teres Minor
flex shoulder & rotate lateral
prevent medial rotation when weight bearing
Teres Major
Flex shoulder & rotate medial
Prevent lateral rotation when weight bearing
Coracobrachialis
adduct, extend, stabilize shoulder
Subscapularis
adduct, extend, medial stabilize shoulder
prevent lateral rotation when weight bearing
Triceps Brachii: Long head
extend elbow, flex shoulder
Triceps Brachii: Lateral/Accessory/Medial head
Extend elbow
Anconeus
extend elbow
Biceps Brachii
flex elbow, extend shoulder
Brachialis
flex elbow
Brachioradialis
supination of antebrachium
Extensor Carpi Radialis
extend carpus
Common Digital Extensor
extend joints of 4 main digits & carpus
Lateral Digital Extensor
extend carpus & joints III,IV,V
Extensor Carpi Ulnaris
abduct carpal joint, support extended carpus
Supinator
rotate forearm lateral (supine) to flex elbow
Abductor Pollicis Longus
abduct first digit & extend carpal joints
Pronator Teres
rotate forearm medial (prone), flex elbow
Flexor Carpi Radialis
flex carpus
Superficial Digital Flexor
flex carpal, metacarpophalangeal, proximal interphalangeal joints of digits II-V
Superficial Digital Flexor
flex carpal, metacarpophalangeal, proximal interphalangeal joints of digits II-V
Superficial Digital Flexor
flex carpal, metacarpophalangeal, proximal interphalangeal joints of digits II-V
Flexor Carpi Ulnaris
flex carpus
flex carpal & metacarpophyalangeal joints of digits
Pronator Quadratus
pronate paw