Dorsal Muscles

We will study the deep muscles of the thoracic region only. These muscles include the rhomboid, rhomboid capitis, supraspinatus, infraspinatus, and teres major.

Connecting the vertebral column with the scapula is the many-portioned rhomboid. This muscle is homologous to the rhomboid major and the rhomboid minor of the human.

The rhomboid capitis of the cat extends from the rhomboid to the head. There is no homologue to the rhomboid capitis in the human.

The supraspinatus, as its name suggests, lies above the spine of the scapula. The infraspinatus lies below the spine of the scapula. The teres major runs along the inferior edge of the scapula connecting the scapula to the humerus. The teres major can be seen on both the ventral and dorsal views of the cat.

You are expected to be able to identify all of the muscles of the cat and human in bold print and the additional optional muscles as your teacher requires. For a list of all of the requisite muscles see pages 137 to 139.

Exercise 16.3

Using your textbook as a guide, label the muscles of the human trunk as listed on Figure 16.1.

Exercise 16.4

Examine the model of the human torso. Be able to identify all of the muscles on the model which have been covered in this chapter.



Posterior Dorsal Human Muscles
Skull Labeling Exercises
Figure 16.1 Muscles of the Human Trunk

Aponeurosis of external oblique Deltoid External oblique Infraspinatus Internal oblique Latissimus dorsi Pectoralis major Pectoralis minor Rectus abdominis Serratus anterior Supraspinatus Teres major Transverse abdominis Trapezius (X2)

Collateral Vessels For Heart DamageIdentifying Skulls For Evolution

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