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

If a person has a crush injury to the C3-C5 spinal segments, you would expect that he:

may lose the ability to breathe independently due to paralysis of the diaphragm

will have impaired fine motor control of the fingers only

will lose all sensation in the lower limbs but retain normal breathing

will experience loss of vision and hearing

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Verified step by step guidance

Understand the anatomy of the spinal cord and its segments: The C3-C5 spinal segments are part of the cervical region of the spinal cord. These segments are crucial because they house the phrenic nerve, which controls the diaphragm, the primary muscle responsible for breathing.

Recognize the role of the diaphragm in respiration: The diaphragm contracts and relaxes to facilitate inhalation and exhalation. If the phrenic nerve is damaged due to injury at the C3-C5 level, the diaphragm may become paralyzed, leading to difficulty or inability to breathe independently.

Eliminate incorrect options based on the injury location: Fine motor control of the fingers is primarily governed by lower cervical segments (C6-C8), not C3-C5. Loss of sensation in the lower limbs is associated with injuries to the lumbar or sacral spinal cord, not the cervical region. Vision and hearing are controlled by cranial nerves and brain structures, not the spinal cord.

Correlate the injury to the expected outcome: A crush injury to the C3-C5 spinal segments can impair the phrenic nerve, leading to paralysis of the diaphragm. This would result in the inability to breathe independently, which is the most likely consequence of such an injury.

Conclude the reasoning: Based on the anatomy and physiology of the spinal cord and the diaphragm, the correct answer is that the person may lose the ability to breathe independently due to paralysis of the diaphragm.