Advanced Chest, Arm, and Back Muscles

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Sternocleidomastoid

Pectoralis major

Serratus anterior

Rectus abdominis

External oblique

Deltoid

Pectoralis minor

Superficial Chest

Human: Human:

1

2

3

Superficial Chest

• 1 Pectoantebrachialis **no

homolog in humans

• 2 Pectoralis major

• 3 Pectoralis minor

• Xiphihumeralis **no homolog in

humans

DeepSuperficial

Levator scapulae

Teres major

Trapezius

Deltoid

Latissimus dorsi

Human: Human:

Superficial back

Teres minor

Rhomboid minor

Rhomboid major

Latissimus dorsi

Deltoid

Long head triceps

Trapezius

Superficial Shoulder, Back, & Forelimb

• Latissimus Dorsi

• Spinotrapezius • Acromiotrapezius • Clavotrapezius

• Levator Scapulae Ventralis

• Spinodeltoid • Acromiodeltoid • Clavodeltoid

• Triceps brachii Lateral Head

• Triceps brachii Long Head

Group VIGroup VI

Head

1

2

3

4

5

6

7

8

10

9

Shoulder

Spinodeltoid

Acromiodeltoid

Clavicodeltoid

Levator scapulae ventralis

Deep Shoulder and BackHuman: Human:

Fig. 11.2

• Clavotrapezius (Reflected)

• Acromiotrapezius

• Supraspinatus

• Infraspinatus

• Triceps Brachii (Long Head)

• Triceps Brachii (Lateral Head)

• Acromiodeltoid

• Clavodeltoid

• Levator scapulae dorsalis

• Splenius

• Rhomboideus minor

• Rhomboideus major

• Spinotrapezius

• Latissimus Dorsi

• Spinalis Dorsi

Deep Shoulder and Back1

2

3

4

56

78

9

10

11

12

13

1415

04_Cat_016-L

Group VIIGroup VII

Deep Shoulder and Back

1. Spinalis Dorsi

2. Longissimus

3. Iliocostalis

4. Serratus Dorsalis (Reflected)

5. Serratus Ventralis (Reflected)

6. omit

7. omit

8. Splenius

9. Levator scapulae dorsalis (Reflected) (aka. Rhomboideus Capitis)

deep back - epaxials

9

deep to clavotrapezius

Head

Deep Chest1. Scalenus ventralis

2. Scalenus medialis

3. Scalenus dorsalis

4. Serratus ventralis

5. Rectus abdominis

6. External intercostals

1 2 3

4

5

6

Head

Deep Chest

1. Transversus Costarum

2. Rectus Abdominis

3a. Scalenus ventralis

3b. Scalenus medius

3c. Scalenus dorsalis

4. Serratus anterior

5. Subscapularis

6. Teres Major

7. omit -- coracobrachialis

8. Latissimus Dorsi

Head

Fig.11.8

Human: Human:

Upper Arm

Group VIIIGroup VIII

Upper Arm, Lateral

1. Acromiotrapezius

2. Levator Scapulae Ventralis

3. Teres Major

4. Triceps brachii Lateral Head (Reflected)

5. Triceps brachii Long Head

6. Triceps brachii Medial Head

7. Biceps brachii

8. Brachialis

9. Clavodeltoid

Head

7

89

Group VIIIGroup VIII

Upper Arm, Medial

1. Clavodeltoid

2. Biceps Brachii

3. Triceps Brachii Medial Head

4. Epitrochlearis **no homolog in humans

5. Triceps Long Head

Head

Upper Arm, Medial

Head

Fig.11.10

Lower Arm, Anterior (Cat = Medial)Human: Human:

1. Brachioradialis

2. Extensor Carpi Radialis Longus

3. Extensor Carpi Radialis Brevis

4. Pronator Teres

5a. Flexor Carpi Radialis

5. Flexor Digitorum Profundus

6. Palmaris Longus

7. Flexor Carpi Ulnaris

8. Clavodeltoid

9. Biceps Brachii

10. Epitrochlearis

11. Long Head of Triceps

12. Medial Head of Triceps 13. omit - Flexor Digitorum Superficialis

Lower Arm, Medial

Head

5a

Lower Arm, Posterior (Cat = Lateral)

Fig.11.10

Human: Human:

Group IXGroup IX

Lower Arm, Lateral1. Triceps brachii (Long Head)

2. Triceps brachii (Lateral Head)

3. Brachialis

4. Brachioradialis

5. Extensor Carpi Radialis Longus

6. Extensor Carpi Radialis Brevis

7. Extensor Digitorum Communis

8. Extensor Digitorum Lateralis

9. Extensor Carpi Ulnaris

10. Flexor Carpi Ulnaris 11. omit – anconeus

Head

Lower Arm, Lateral

Head

Left - Anterior forearm

Brachioradialis

Flexor digitorum superficialis

Flexor carpi radialis

Palmaris longus

Flexor carpi ulnaris

Radial artery

Flexor pollicis longus

Pronator teres (cut)

Left - Posterior forearm

Extensor carpiradialis brevis

Extensor carpiulnaris

Extensor pollicis brevis

Abductor pollicis longus

Brachioradialis

Extensor digitorum

Extensor pollicis longus

Lower Arm, Medial

Lower Arm, Lateral