Carnivore Thoracic Limb Muscle Chart

The platysma is primarily responsible for:

A. Flexing the elbow
B. Extending the shoulder
C. Tensing and moving the skin of the face
D. Extending the carpus

C. Tensing and moving the skin of the face

The platysma is innervated by the:

A. Radial nerve
B. Facial nerve
C. Axillary nerve
D. Median nerve

B. Facial nerve

The cutaneus trunci is used clinically to test the:

A. Patellar reflex
B. Withdrawal reflex
C. Panniculus reflex
D. Extensor reflex

C. Panniculus reflex

The cutaneus trunci is innervated by the:

A. Thoracodorsal nerve
B. Lateral thoracic nerve
C. Axillary nerve
D. Ulnar nerve

B. Lateral thoracic nerve

The omotransversarius originates from the:

A. Scapular spine
B. Wing of the atlas
C. Humerus
D. Sternum

B. Wing of the atlas

The omotransversarius primarily:

A. Retracts the limb
B. Extends the elbow
C. Advances the limb and laterally flexes the neck
D. Flexes the digits

C. Advances the limb and laterally flexes the neck

The omotransversarius is innervated by the:

A. Spinal accessory nerve
B. Radial nerve
C. Median nerve
D. Musculocutaneous nerve

A. Spinal accessory nerve

The latissimus dorsi inserts on the:

A. Deltoid tuberosity
B. Olecranon
C. Teres major tuberosity
D. Greater tubercle

C. Teres major tuberosity

The primary action of the latissimus dorsi is to:

A. Advance the limb
B. Retract the thoracic limb
C. Extend the elbow
D. Extend the carpus

B. Retract the thoracic limb

The latissimus dorsi is innervated by the:

A. Radial nerve
B. Axillary nerve
C. Thoracodorsal nerve
D. Median nerve

C. Thoracodorsal nerve

The superficial pectoral muscles arise from the:

A. First three sternebrae
B. Scapula
C. Radius
D. Thoracic vertebrae

A. First three sternebrae

The primary action of the superficial pectorals is:

A. Adduction of the thoracic limb
B. Elbow extension
C. Carpal flexion
D. Supination

A. Adduction of the thoracic limb

The superficial pectorals are innervated by:

A. Caudal pectoral nerves
B. Cranial pectoral nerves
C. Radial nerve
D. Axillary nerve

B. Cranial pectoral nerves

The deep pectoral muscle arises from:

A. The first three sternebrae only
B. All sternebrae
C. The scapula
D. Thoracic vertebrae

B. All sternebrae

The deep pectoral muscle is innervated by:

A. Cranial pectoral nerves
B. Caudal pectoral nerves
C. Radial nerve
D. Axillary nerve

B. Caudal pectoral nerves

The brachiocephalicus is composed of:

A. Deltoideus and trapezius
B. Cleidocephalicus and cleidobrachialis
C. Rhomboideus and trapezius
D. Biceps and brachialis

B. Cleidocephalicus and cleidobrachialis

Bilaterally, the brachiocephalicus functions to:

A. Extend the elbow
B. Flex the carpus
C. Advance the thoracic limb
D. Extend the digits

C. Advance the thoracic limb

The cleidobrachialis inserts on the:

A. Olecranon
B. Distal crest of the greater tubercle (dog)
C. Radial tuberosity
D. Lesser tubercle

B. Distal crest of the greater tubercle (dog)

The trapezius consists of ______ parts.

A. One
B. Two
C. Three
D. Four

B. Two

The two parts of the trapezius are:

A. Cervical and thoracic
B. Capital and thoracic
C. Acromial and spinous
D. Long and short

A. Cervical and thoracic

The trapezius primarily:

A. Extends the elbow
B. Elevates and adducts the scapula
C. Flexes digits
D. Supinates the antebrachium

B. Elevates and adducts the scapula

The rhomboideus consists of:

A. Two parts
B. Three parts
C. Four parts
D. Five parts

B. Three parts

The three parts of the rhomboideus are:

A. Capital, cervical, and thoracic
B. Acromial, spinous, and thoracic
C. Long, lateral, and medial
D. Cervical, lumbar, and sacral

A. Capital, cervical, and thoracic

The rhomboideus primarily acts to:

A. Flex the elbow
B. Stabilize and elevate the scapula
C. Extend the carpus
D. Flex the digits

B. Stabilize and elevate the scapula

The deltoideus inserts on the:

A. Greater tubercle
B. Deltoid tuberosity
C. Olecranon
D. Radial tuberosity

B. Deltoid tuberosity

The primary action of the deltoideus is:

A. Shoulder flexion
B. Shoulder extension
C. Elbow extension
D. Carpal flexion

A. Shoulder flexion

The deltoideus is innervated by the:

A. Radial nerve
B. Axillary nerve
C. Median nerve
D. Ulnar nerve

B. Axillary nerve

The infraspinatus originates from the:

A. Supraspinous fossa
B. Infraspinous fossa
C. Subscapular fossa
D. Glenoid cavity

B. Infraspinous fossa

The infraspinatus inserts on the:

A. Lesser tubercle
B. Greater tubercle
C. Deltoid tuberosity
D. Olecranon

B. Greater tubercle

The infraspinatus is innervated by the:

A. Axillary nerve
B. Radial nerve
C. Suprascapular nerve
D. Musculocutaneous nerve

C. Suprascapular nerve

The teres minor originates from the:

A. Coracoid process
B. Supraglenoid tubercle
C. Infraglenoid tubercle
D. Olecranon

C. Infraglenoid tubercle

The teres minor inserts on the:

A. Greater tubercle
B. Lesser tubercle
C. Teres minor tuberosity
D. Deltoid tuberosity

C. Teres minor tuberosity

The supraspinatus acts primarily to:

A. Flex the shoulder
B. Extend the shoulder
C. Extend the elbow
D. Flex the carpus

B. Extend the shoulder

The supraspinatus is considered a functional:

A. Medial collateral ligament
B. Lateral collateral ligament of the shoulder
C. Carpal ligament
D. Flexor retinaculum

B. Lateral collateral ligament of the shoulder

The brachialis originates from the:

A. Radial tuberosity
B. Brachial (musculospiral) groove
C. Olecranon
D. Greater tubercle

B. Brachial (musculospiral) groove

The primary action of the brachialis is:

A. Shoulder extension
B. Elbow flexion
C. Carpal extension
D. Digit extension

B. Elbow flexion

The brachialis is innervated by the:

A. Radial nerve
B. Axillary nerve
C. Musculocutaneous nerve
D. Median nerve

C. Musculocutaneous nerve

The anconeus is a weak:

A. Elbow flexor
B. Elbow extensor
C. Carpal flexor
D. Shoulder extensor

B. Elbow extensor

The anconeus is innervated by the:

A. Median nerve
B. Ulnar nerve
C. Radial nerve
D. Axillary nerve

C. Radial nerve

All heads of the triceps brachii insert on the:

A. Greater tubercle
B. Olecranon
C. Radial tuberosity
D. Deltoid tuberosity

B. Olecranon

The primary action of the triceps brachii is:

A. Elbow flexion
B. Elbow extension
C. Carpal extension
D. Digit flexion

B. Elbow extension

The triceps brachii is innervated by the:

A. Axillary nerve
B. Musculocutaneous nerve
C. Radial nerve
D. Ulnar nerve

C. Radial nerve

The tensor fasciae antebrachii originates from the aponeurosis of the:

A. Triceps brachii
B. Latissimus dorsi
C. Deltoideus
D. Biceps brachii

B. Latissimus dorsi

The subscapularis originates from the:

A. Supraspinous fossa
B. Infraspinous fossa
C. Subscapular fossa
D. Glenoid cavity

C. Subscapular fossa

The subscapularis inserts on the:

A. Greater tubercle
B. Lesser tubercle
C. Deltoid tuberosity
D. Olecranon

B. Lesser tubercle

The coracobrachialis originates from the:

A. Acromion
B. Infraglenoid tubercle
C. Coracoid process
D. Supraglenoid tubercle

C. Coracoid process

The biceps brachii originates from the:

A. Coracoid process
B. Infraglenoid tubercle
C. Supraglenoid tubercle
D. Deltoid tuberosity

C. Supraglenoid tubercle

The primary action of the biceps brachii is:

A. Elbow extension
B. Elbow flexion
C. Carpal flexion
D. Digit extension

B. Elbow flexion

The pronator quadratus originates from the:

A. Radius
B. Ulna
C. Humerus
D. Metacarpal III

B. Ulna

Both pronator quadratus and pronator teres are innervated by the:

A. Radial nerve
B. Ulnar nerve
C. Median nerve
D. Axillary nerve

C. Median nerve

The flexor carpi radialis inserts on:

A. Accessory carpal bone
B. MC II and MC III
C. Distal phalanges
D. MC V

B. MC II and MC III

The superficial digital flexor inserts on the:

A. Distal phalanges
B. Middle phalanges of digits II–V
C. Metacarpals II–V
D. Accessory carpal bone

B. Middle phalanges of digits II–V

The flexor carpi ulnaris inserts on the:

A. MC V
B. Radius
C. Accessory carpal bone
D. Distal phalanx

C. Accessory carpal bone

The deep digital flexor inserts on the:

A. Middle phalanges
B. Distal phalanges
C. Metacarpals
D. Accessory carpal bone

B. Distal phalanges

The extensor carpi radialis primarily:

A. Flexes the carpus
B. Extends the carpus
C. Flexes digits
D. Supinates the antebrachium

B. Extends the carpus

The brachioradialis is:

A. Well developed in dogs
B. Well developed in cats
C. Absent in cats
D. A carpal flexor

B. Well developed in cats

The common digital extensor inserts on the:

A. Distal phalanges of digits II–V
B. Middle phalanges
C. MC II and III
D. Accessory carpal bone

A. Distal phalanges of digits II–V

The ulnaris lateralis primarily:

A. Extends the carpus
B. Flexes the carpus
C. Extends digits
D. Supinates the antebrachium

B. Flexes the carpus

The supinator muscle is innervated by the:

A. Median nerve
B. Ulnar nerve
C. Radial nerve
D. Axillary nerve

C. Radial nerve

The abductor pollicis longus inserts on:

A. MC I
B. MC II
C. Digit II
D. Radius

A. MC I