Cat Dissection First muscle test

Masseter

Elevates the Mandible

Mylohyoid

Elevates the floor of the mouth

Sternohyoid

Retracts the hyoid bone

Cleidomastoid

When clavicle is stationary: rotates the head

When head is stationary: moves clavicle cranially

Digastric

Depresses of the mandible

Sternomastoid

When simultaneously contracting: flex the head

When individually contracting: rotates the head

Clavotrapezius

Forwardly extends the humerus

Clavobrachialis (Clavodeltoid)

Flexes the forearm

Spinodeltoid

Functions synergist with the acromiodeltoid to flex and rotate the humerus

Acromiotrapezius

Adducts the scapula

Spinotrapezius

Pulls the scapula caudally (downward)

Latissimus Dorsi

Pulls the forelimb dorsocaudally (back and down)

Pectoralis Major

Adducts the forelimb

Pectoralis Minor

Adducts the forelimb

Xiphihumeralis

Functions synergist with the pectoralis muscles in adduction of the forelimb

Pectoantebrachialis

Adducts the Forelimb

Supraspinatus

Protracts the humerus

Infraspinatus

Rotates the Humerus in a lateral direction

Triceps brachii

Extends the antebrachium

Biceps brachii

Primary is flexion of the antebrachium, but also supinates the Manus and stabilizes the shoulder joint

Brachialis

Functions synergist with the biceps brachii to flex the antebrachium

Acromiodeltoid

It flexes and laterally rotates the humerus

Levator scapulae ventralis

Pulls scapula in cranial direction

Subscapularis

Adducts the humerus

Flexor digitorum superficialis (palmaris longus)

Flexes the digits

Flexor carpi ulnaris

Extends carpals on the ulnar side

Extensor digitorum lateralis

Extends the digits of the manus

Extensor Digitorum Communis

Extends second through fifth digits of the manus

Extensor carpi radialis longus

Extends the manus