Muscles: Abdomen and Back

Question 1

What are the major movements of the trunk?

Answer 1

• Flexion/extension
• Lateral flexion
• Some rotation

Question 2

Where do glinding movements occur in the trunk?

The joint

Answer 2

Intevertebral facet joints (synovial joints)

Question 3

Label the abdominal muscles

Answer 3

Question 4

What are the muscles along each side of the spinous processes of vertebrae?

Answer 4

The erector spinae muscles

Question 5

Label the muscles of the anterior trunk

Answer 5

Question 6

What is the role of the linea alba?

Answer 6

To keep the left and right abdominal muscles separate

Question 7

What’s the muscle with serrated edge?

Answer 7

Serratus anterior

Question 8

What movements is the serratus anterior involved in?

Answer 8

• Involved in movements of the scapula
• Protraction
• Elevation of glenohumeral joint
• Rotation
• Stabilisation

Question 9

1. Name the muscle
2. Where does it insert

Answer 9

1. Pectoralis major
2. Lateral attachment point at the humerus

Question 10

1. Name the muscle
2. What joint does it cover
3. What movements does it allow

Answer 10

1. Deltoid
2. Glenohumeral joint
3. Abduction, flexion, extension at the shoulder joint

Question 11

1. Name the muscle
2. What movements does it permit at the pectoral girdle

Answer 11

1. Trapezius
2. • Elevation/depression
   • Retraction
   • Rotation
   • Shoulder abduction

Also helps with shoulder resistance, stops shoulder droop

Question 12

1. Name the muscle
2. What joint does it allow movement at
3. What movements does it allow

Answer 12

1. Latissimus dorsi
2. Shoulder/Scapulothoracic joint
3. • Extension/flexion of torso
   • Extension/lateral flexion of lumbar spine