Laboratories 7 & 8: Muscles I and II

During the next two weeks we will be dissecting and identifying skeletal muscles of the cat.  You will be required to identify muscles both in the dissected cat, as well as humans.  On the final practical, all human muscle identification will be from illustrations or direct questions.

 

In addition to muscle identification, you are also required to know the origin, insertion, and action of a select group of muscles in the human.  Below are listed (1) muscles to identify in the cat, (2) muscles to identify in the human (using figures in the lab manual), and (3) muscles for which you must know the origin, insertion, and action in the human. This information exists in tables throughout Exercise 15.  Please note: where more than 2 origins, insertions, or actions are listed, you are only required to know the first two.  Example: see Pectoralis major in Table 15.3.  You are expected to know that the Pectoralis major originates on the clavicle and sternum, inserts on the greater tubercle of the humerus, and is a prime mover of arm flexion and adducts and medially rotates the arm.

 

Muscles to Identify in the Cat

1. Head and Neck region

a. Masseter

b. Digastric

c. Mylohyoid

d. Sternohyoid

e. Sternothyroid

f. Sternomastoid

g. Cleidomastoid

 

2. Superficial Ventral Thorax

a. Pectoralis major

b. Pectoralis minor

c. Pectoantebrachialis

d. Xiphihumeralis

 

3. Abdominal

a. Rectus abdominus

b. External oblique

c. Internal oblique

d. Tranversus abdominus

 

4. Superficial Dorsal Thorax

a. Clavotrapezius

b. Acromiotrapezius

c. Spinotrapezius

d. Clavodeltoid

e. Acromiodeltoid

f. Spinodeltoid

g. Levator scapulae ventralis

h. Latissimus dorsi

 

5. Deep Ventral Thorax

a. Scalenes

b. Subscapularis

c. Serratus ventralis

 

6. Deep Dorsal Thorax

a. Supraspinatus

b. Rhomboid capitus

c. Rhomboideus

 

7. Proximal Forelimb

a. Triceps brachii

b. Brachialis

c. Biceps brachii

d. Epitrochlearis

 

8. Distal Forelimb

a. Brachioradialis

b. Extensor carpi radialis

c. Pronator teres

d. Flexor carpi radialis

e. Flexor digitorum profundus

f. Palmaris longus

g. Flexor carpi ulnaris

 

9. Posterolateral Thigh

a. Sartorius

b. Gluteus medius

c. Gluteus maximus

d. Tensor fascia latae

e. Caudofemoralis

 

10. Proximal Hindlimb (posterior view)

a. Biceps femoris

b. Semimembranosus

c. Semitendinosus

 

11. Proximal Hindlimb (anterior view)

a. Sarotrius

b. Gracilis

c. Vastus medialis

d. Vastus lateralis

 

12. Distal Hindlimb (anterior view)

a. Gastrocnemius

 

Muscles to Identify in the Human

* Know origin, insertion, and action

1. Head and Neck region

a. Masseter*

b. Digastric

c. Mylohyoid

d. Sternohyoid

e. Sternothyroid

f. Sternocleidomastoid*

 

2. Superficial Ventral Thorax

a. Pectoralis major*

b. Pectoralis minor

c. Deltoid*

 

3. Abdominal

a. Rectus abdominus*

b. External oblique

c. Internal oblique

d. Transversus abdominus

4. Superficial Dorsal Thorax

a. Trapezius*

b. Deltoid*

c. Teres minor

d. Teres major*

e. Latissimus dorsi*

 

5. Deep Ventral Throax

a. Subscapularis

b. Serratus anterior

c. Intercostals exterior*

d. Intercostals interior*

 

6. Deep Dorsal Thorax

a. Supraspinatus

b. Infraspinatus

c. Rhomboid major*

d. Rhomboid minor*

e. Erector spinae*

 

7. Proximal Arm

a. Triceps brachii*

b. Brachialis*

c. Biceps brachii*

 

8. Distal Arm

a. Brachioradialis

b. Pronator teres

c. Flexor carpi radialis*

d. Palmaris longus

e. Flexor carpi ulnaris

 

9. Posterolateral Thigh

a. Gluteus medius*

b. Gluteus maximus

c. Tensor fascia latae

 

10. Proximal Leg (posterior view)

a. Biceps femoris

b. Semimembranosus

c. Semitendinosis*

 

11. Proximal Leg (anterior view)

a. Vastus medialis*

b. Rectus femoris*

c. Vastus lateralis*

d. Vastus intermedius*

 

12. Distal Leg

a. Gastrocnemius

b. Soleus