Exercise 12
What is the origin of the brachialis?
Anterior distal surface of humerus
Which muscles are antagonists to the triceps brachii? (2)
Biceps Brachii and Brachialis
What is the origin of the levator scapulae?
C1-C4
What are the three muscles that correspond to the single trapezius in humans?
Clavotrapezius, Acromiotrapezius, and Spinotrapezius
What is the insertion of the pectoralis minor?
Corocoid Process of Scapula
What is the action of the triceps brachii?
Extends and adducts arm, extends forearm
What is the action of the epitrochlearis?
Extends the forelimb
What muscle extends both the hand and the phalanges?
Extensor Digitorum
What is the action of the flexor carpi radialis muscles? (2)
Flexes and abducts hand
The pectoralis major has what action?
Flexes, adducts and medially rotates arm
Which muscle is more developed in cats, the flexor digitorum superficialis or the flexor digitorum profundus?
Flexor digitorum profundus
What is the insertion of the latissimus dorsi?
Intertubercular groove of humerus
What is the action of the deltoid muscle?
It abducts the arm, flexes, extends medially and laterally rotates arm
What is the insertion of the subscapularis?
Lesser tubercle of humerus
What is the origin of the flexor carpi ulnaris? (3)
Medial Epicondyle of humerus, dorsal ulna and olecranon process
What is the insertion of the extensor carpi ulnaris muscle?
Metacarpal 5
Where does the flexor digitorum superficialis insert?
Middle phalanges of digits 3-5
Does the biceps brachii muscle originate or insert on the humerus?
Neither
What is the origin of the trapezius?
Occipital Protuberance, nuchal ligament, spinous process, C7-T12
What muscles flex the hand? Name all the flexor muscles of forearm
Palmaris longus, flexor digitorum profundus and superficialis, flexor carpi radialis, flexor carpi ulnaris
Name all the muscles that flex the arm (4)
Pectoralis major, Deltoid, coracobrachialis and Biceps brachii
Where are the extensor carpi muscles located, on the anterior or posterior side of the forearm?
Posterior
What is an antagonist to the supinator muscle? (2)
Pronator Teres and Pronator quadratus
Name the origin of the supraspinatus muscle
Supraspinous Fossa
How does the deltoid of the cat differ from the deltoid of the human?
The deltoid in the cat contains 3 muscles: Clavodeltoid, Acromiodeltoid, and Spinodeltoid
Which muscle does not correspond to a human muscle?
Xiphihumeralis
What muscles extend the thumb? (2)
extensor pollicis longus and brevis
