Question

B. Criteria for Naming Muscles For each of the muscles below, state the criteria used for naming the muscle. For example, serratus anterior is a saw-toothed anterior muscle. __________ 1.Latissimus dorsi __________ 2.Rectus abdominis __________ 3.Trapezius __________ 4.Biceps brachii __________ 5.Levator scapulae __________ 6.Flexor carpi radialis __________ 7.Piriformis __________ 8.Gluteus medius __________ 9.Rhomboid major __________ 10.Pectoralis major

Answer 1

Answer:

1) Latissimus dorsi-    A broad back muscle ( relative size of the muscle is the criteria)

2) Rectus abdominis-  Parallel abdominal muscles ( the direction of muscle fascicles relative to its mid-line, is thee criteria)

3) Trapezius- Trapezoidal shaped muscle (shape of muscle is the criteria)

4) Biceps brachii- Muscle originating from two points (Origin of the muscle is the criteria)

5) Levator scapulae- A muscle which lifts the scapula (Function of the muscle is the criteria)

6) Flexor carpi radialis- Muscle which bends joints closer ( A Flexion) (Function of the muscle is the criteria)

7) Piriformis- Pear shaped muscle in the gluteal region of the lower limb (Shape of muscle is its criteria)

8) Gluteu medius- Medium largest gluteal muscle (Size of the muscle is the criteria)

9) Rhomboid major- Rhombus shaped muscle (shape of muscle is the criteria)

10) Pectoralis major- Large fan shaped breast muscle (Size and position of the muscle is the criteria)