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

12. The Central Nervous System

Introduction to the Central Nervous System

Anatomy & Physiology

12. The Central Nervous System

Introduction to the Central Nervous System

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Multiple Choice

In an adult, the spinal cord typically ends at which vertebral level?

T12

L1-L2

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Verified step by step guidance

Understand the anatomy of the spinal cord: The spinal cord is a cylindrical structure that extends from the brainstem and is protected by the vertebral column. It serves as a communication pathway between the brain and the rest of the body.

Learn the typical termination point of the spinal cord: In adults, the spinal cord does not extend the entire length of the vertebral column. Instead, it typically ends at the level of the L1-L2 vertebrae, forming the conus medullaris.

Recognize the significance of the conus medullaris: Below the conus medullaris, the spinal nerves continue as a bundle called the cauda equina, which resembles a horse's tail. This anatomical feature is important for understanding the transition from the spinal cord to peripheral nerves.

Compare the options provided: T12 is too high, as the spinal cord extends beyond this level. L5 and S1 are too low, as the spinal cord terminates before reaching these levels. L1-L2 is the correct range for the termination point in adults.

Apply this knowledge to clinical contexts: Understanding the termination point of the spinal cord is crucial for procedures like lumbar punctures, which are typically performed below L2 to avoid damaging the spinal cord.