The document discusses the muscles of the neck and trunk. It divides the neck into the anterior and posterior triangles, separated by the sternocleidomastoid muscle. It then describes various neck muscles including the sternocleidomastoid, trapezius, infrahyoid, suprahyoid, and lateral neck muscles. Regarding the trunk, it outlines the deep muscles of the back, deep muscles of the thorax, respiratory muscles, muscles of the abdominal wall, muscles that form the floor of the abdominopelvic cavity, muscles that act on the scapula, and muscles that act on the arm. The document stresses the importance of identifying these muscles through diligent study.

1. The Muscles of the Neck and Trunk

2. The Muscles of the Neck

5. Regions of the Neck To facilitate the seemingly complicated area, the neck is divided into two major areas, or triangles, by the sternocleidomastoid muscle. These are: 1. anterior triangle - the area anterior to the SCM and below the inferior border of the mandible. 2. posterior triangle - the area posterior to the SCM and is limited posteriorly by the trapezius muscle.

7. Sternocleidomastoid Muscle

8. Trapezius Muscle

9. I. Infrahyoid Muscles

11. II. Suprahyoid Muscles

12. Suprahyoid Muscles

14. The lateral muscles of the neck

18. The Muscles of the Trunk

19. 1. Deep Muscles of the Back Collectively these muscles control the vertebral column

23. Deep Muscles of the Thorax Respiratory Muscles

28. Muscles of the Abdominal Wall

32. Muscles that Form the Floor of the Abdominopelvic Cavity

35. Muscles that Act on the Scapula

38. Muscles that Act on the Arm

41. LET US IDENTIFY THESE MUSCLES!!

51. Got to study really hard now!