Muscle Exam Lab · Action → Muscle

Name at least one correct prime mover or high-value muscle before opening.

1. Scapular protraction and upward rotation

Serratus anterior.

2. Scapular retraction

Middle trapezius and rhomboids.

3. Scapular elevation

Upper trapezius and levator scapulae.

4. Shoulder abduction

Middle deltoid; supraspinatus assists/initiates.

5. Shoulder medial rotation

Subscapularis, pectoralis major, latissimus dorsi, teres major, anterior deltoid.

6. Shoulder lateral rotation

Infraspinatus and teres minor; posterior deltoid assists.

7. Shoulder extension/adduction/medial rotation

Latissimus dorsi and teres major.

8. Elbow flexion regardless of pronation/supination

Brachialis.

9. Elbow flexion plus powerful supination

Biceps brachii.

10. Elbow extension

Triceps brachii; anconeus assists.

11. Forearm pronation

Pronator teres and pronator quadratus.

12. Forearm supination

Supinator and biceps brachii.

13. Trunk contralateral rotation

External oblique.

14. Trunk ipsilateral rotation

Internal oblique.

15. Hip extension

Gluteus maximus; hamstrings assist.

16. Hip abduction/pelvic stabilization

Gluteus medius/minimus.

17. Hip flexion

Iliopsoas; rectus femoris/TFL/sartorius assist.

18. Hip adduction

Adductor group, gracilis, pectineus.

19. Knee extension

Quadriceps.

20. Knee flexion

Hamstrings; gastrocnemius/sartorius/gracilis assist.

21. Ankle plantarflexion

Gastrocnemius and soleus.

22. Dorsiflexion/inversion

Tibialis anterior.

23. Plantarflexion/inversion

Tibialis posterior.

24. Eversion

Fibularis longus/brevis; tertius assists.

25. Contralateral cervical rotation

SCM.

26. Ipsilateral cervical rotation

Splenius capitis/cervicis.

27. Mandibular elevation

Masseter, temporalis, medial pterygoid.

28. Primary inspiration

Diaphragm.

29. Abduct flexed hip + laterally rotate femur

Several deep lateral rotators, including piriformis/obturator internus/gemelli.

30. Unlock knee from terminal extension

Popliteus.