Muscle Anatomy: Upper Forelimb Flashcards
Where does the biceps brachi originate?
Cranial aspect of the humerus
Where does the biceps Brachi insert?
Cranial aspect of the radius
What is the action of the biceps brachi?
Extends and stabilizes the shoulder
and flex the elbow
Extends carpus
Where does the brachialis originate?
Proximal end of humerus on caudal surface
Where does the brachialis insert?
Head of radius cranially and medially
What is the action of the Brachialis?
Flex the elbow
What are the 4 pectoral muscles?
Transverse
Descending
Ascending
Subclavian
What two pectoral muscles are superficial?
Transverse
Descending
What two pectoral muscles are deep?
Ascending
Subclavius
Where does the ascending pectoral originate?
Ventral surface of sternum & costal cartilages from ribs 4-9
Where does the ascending pectoral insert?
Humerus
What is the action of the ascending pectoral?
Adduct the limb
Pulls trunk of body forward
Where does the descending pectoral originate?
Manubrium on sternum
Where does the descending pectoral insert?
Humerus
Arm fascia
What is the action of the descending pectoral?
Adduct the limb
Where does the subclavian pectoral originate?
Sternum on cranial half
Lateral surface from first 4 costal cartilage
Where does the subclavian pectoral insert?
Cranial border of scapula
What is the action of the subclavian pectoral?
Support trunk of body
Moves scapula cranially
Where does the transverse pectoral originate?
Sternum
Costal cartilages 1-6
Where does the transverse pectoral insert?
Forearm fascia at top end
What is the action of transverse pectoral?
Adduct forelimb
Tenses forearm fascia
