Question
A 42-year-old man sustained a head injury, and after that blood collected around his eyes produced swelling. Which structural attachment is the cause of this condition?
| A. |
Aponeurosis attachment
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| B. |
Periosteum
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| C. |
Cellulitis
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| D. |
None of the above
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Show Answer
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Correct Answer � A
Explanation
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Pathophysiology of Periorbital Swelling:
- The swelling around the eyes (periorbital ecchymosis or “raccoon eyes”) following a head injury results from the tracking of blood into the loose connective tissue of the eyelids.
- This occurs due to the connections and movements facilitated by the galea aponeurotica, which is the aponeurosis layer of the scalp. The galea aponeurotica is continuous with the superficial musculoaponeurotic system (SMAS), which allows blood to spread from the site of injury, including the forehead or scalp, to the periorbital area.
Role of Aponeurosis in the Condition:
- The galea aponeurotica provides a pathway for the spread of blood from the scalp or forehead region to the loose connective tissue around the eyes.
- Injuries to the forehead or scalp can lead to blood tracking inferiorly under the force of gravity, collecting in the periorbital area.
Reasons to rule out other options
Option B- The periosteum is a dense layer of connective tissue that covers the outer surface of bones. While it plays a role in bone health and repair, it is not directly associated with the formation of swelling around the eyes due to a head injury.
Option C- Cellulitis is a bacterial infection of the skin and underlying tissues. It can cause redness, swelling, and pain in the affected area. However, it is not the primary cause of the described condition involving blood collection and swelling after a head injury.
