Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

10. Muscles

Muscle Actions

Anatomy & Physiology

10. Muscles

Muscle Actions

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Multiple Choice

Which muscles are most likely to be overactive when knee valgus occurs during the overhead squat?

Tensor fasciae latae

Gluteus maximus

Tibialis anterior

Vastus medialis oblique

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Verified step by step guidance

Understand the concept of knee valgus: Knee valgus refers to the inward collapse of the knees during movement, such as an overhead squat. It is often associated with muscle imbalances or improper biomechanics.

Identify the muscles involved in knee valgus: Overactive muscles are those that are compensating excessively, leading to the inward movement of the knees. These muscles typically pull the knee inward or contribute to improper alignment.

Analyze the role of the Tensor fasciae latae (TFL): The TFL is a hip abductor and internal rotator. When overactive, it can pull the femur inward, contributing to knee valgus during squatting movements.

Evaluate the role of the Gluteus maximus: The Gluteus maximus is a hip extensor and external rotator. If underactive, it fails to counteract the inward pull of the TFL, but if overactive in certain cases, it may contribute to compensatory movement patterns.

Consider the Vastus medialis oblique (VMO) and Tibialis anterior: The VMO is responsible for stabilizing the patella and knee alignment, while the Tibialis anterior controls dorsiflexion and foot positioning. These muscles are less likely to be overactive in knee valgus but may play a role in overall movement mechanics.