Intrinsic Muscles Of Thoracic Limb Flashcards
Origin of INTEROSSEUS
Palmer surface of distal row of carpal bones and proximal Palmer surface of the third metacarpal (cannon) bone
Insertion of INTEROSSEUS
Proximal sesamoid and e tensor process of distal phalanx
Function of INTEROSSEUS
Prevents overextension of metacarpophalangeal and interphalangeal and is part of stay apparatus
Origin of SUBSCAPULARIS
Subscapular fossa
Insertion of SUBSCAPULARIS
Lesser tubercle of humerus
Innervation of SUBSCAPULARIS
Subscapular nerve
Action of SUBSCAPULARIS
Addicts humerus and pronates limb
Origin of TERES MAJOR
Caudal angle and caudal border of scapula
Insertion of TERES MAJOR
Teres tuberosity
Innervation of TERES MAJOR
Axillary nerve
Action of TERES MAJOR
Pronates and adducts humerus
Origin of TERES MINOR
Caudal border of scapula
Insertion of TERES MINOR
Ridge connecting greater tubercle and deltoid tuberosity
Innervation of TERES MINOR
Axillary nerve
Action of TERES MINOR
Assists in shoulder flexion and arm abduction, and supination
Origin of INFRASPINATUS
Infraspinatus fossa
Insertion of INFRASPINATUS
Greater tubercle of humerus
Inner action of INFRASPINATUS
Suprascapula nerve
Action of INFRASPINATUS
Abducts arm and externally rotates it. Makes fine adjustments to angle of shoulder joint
Origin of SUPRASPINATUS
Supraspinous fossa of scapula
Insertion of INFRASPINATUS
Craniodorsal parts of bother greater and lesser tubercles of humerus
Innervation of SUPRASPINATUS
Suprascapular nerve
Action of SUPRASPINATUS
Provides lateral support for glenohumeral joint