Trunk Muscles

If a muscle's name includes the term "rectus" it means:

• Its fibers run parallel to the midline
• Its fibers run perpendicular to the midline
• It is part of the rectum
• Its fibers run on a slant

If a muscle's name includes the term "oblique" it means:

• Its fibers run parallel to the midline
• Its fibers run perpendicular to the midline
• It does not allow light to pass through it
• Its fibers run on a slant

This muscle has a broad origin from the occipital skull bone and spine. It inserts on the scapula and clavicle.

• Lattisimus Dorsi
• External Oblique
• Trapezius
• Deltoid

This muscle has its origin on the lower part of the spine and inserts on the humerus. It is important in swimming or throwing a punch.

• Deltoid
• Erector Spinae
• Latissimus Dorsi
• Trapezius

This muscle has fibers that runs parallel to the midline over the abdominal girdle. It is known as the "six pack" muscle

• External Oblique
• Transverse Abdominis
• Rectus Abdominis
• Quadratus Lumborum

Which is not a muscle of the abdominal girdle?

• Internal Oblique
• External Oblique
• Transverse Abdominis
• Quadratus Lumborum

This muscle functions to flex and medially rotate the shoulder, abduct the arm, and extend and laterally rotate the arm.

• Deltoid
• Latissimus Dorsi
• Trapezius
• Pectoralis Major

This muscle is fan-shaped and covers the upper part of the chest. It works to adduct the arm.

• Pectoralis major
• Intercostal muscles
• Trapezius
• Latissimus dorsi

These muscles are the primary movers of the spine. They are composite muscles consisting of three muscle columns.

• Deltoid
• Erector spinae
• Latissimus dorsi
• Quadratus lumborum

What is the name of this muscle?

• Pectoralis
• Triceps
• External Obliques
• Rectus Abdominus