Muscles of the Torso

Identify the muscle:

• Deltoid

• Pectoralis Major

• Pectoralis Minor

• Platysma

• Trapezius

Answer explanation

The deltoid is the major shoulder muscle visible from the outside. It is named deltoid because it is shaped like a triangle, like the greek letter delta.

Identify the muscle:

• Intercostals

• Pectoralis Major

• Pectoralis Minor

• Platysma

• Trapezius

Answer explanation

Inter = Between

Costal = ribs or near the ribs

Intercostal muscles are between the ribs.

Identify the muscle:

• Intercostals

• Pectoralis Major

• Pectoralis Minor

• Platysma

• Trapezius

Answer explanation

Pectus - Latin for breast

Pectoralis muscles are always located in the breast region.

Identify the muscle:

• Intercostals

• Pectoralis Major

• Pectoralis Minor

• Platysma

• Trapezius

Answer explanation

Pectus - Latin for breast

Pectoralis muscles are always located in the breast region.

This muscle is the smaller of the two - so it is referred to as minor.

Identify the muscle:

• Intercostals

• Pectoralis Major

• Pectoralis Minor

• Platysma

• Trapezius

Answer explanation

The platysma is a reference to a "plate". It is a flat, wide muscle that covers many of the other muscles of the neck.

Identify the muscle:

• Intercostals

• Serratus Anterior

• Sternocleidomastoid

• Pectoralis Minor

• Trapezius

Answer explanation

I don't know if the muscle is named for this, but the "bumpy" edge of the muscle group looks like the edge of a serrated knife. (# memory device)

Identify the muscle:

• Intercostals

• Serratus Anterior

• Sternocleidomastoid

• Pectoralis Minor

• Trapezius

Answer explanation

Named for the bones!

Sterno - sternum

Cleido - Clavicle

Mastoid - mastoid process

Identify the muscle:

• Intercostals

• Serratus Anterior

• Sternocleidomastoid

• Pectoralis Minor

• Trapezius

Answer explanation

This is another muscle named for its shape. Shaped like a trapezoid (sort of) from the back.

Identify the muscle:

• External Oblique

• Internal Oblique

• Rectus Abdominis

• Transverse Abdominis

• Seratus Anterior

Answer explanation

Oblique is always a reference to a diagonal direction. In this case, the muscle fibers are arranged diagonally compared to the axis of the body.

This is the outermost layer of these muscles - external.

Identify the muscle:

• External Oblique

• Internal Oblique

• Rectus Abdominis

• Transverse Abdominis

• Seratus Anterior

Answer explanation

Oblique is always a reference to a diagonal direction. In this case, the muscle fibers are arranged diagonally compared to the axis of the body.

This layer of muscle is just inside the outermost layer of muscle, so it is named "internal".