‘Sparrow’s foot marks’ are seen in which of the following injuries?
**Core Concept**
Sparrow's foot marks, also known as 'bird's foot marks' or 'abrasion marks', are a type of skin injury pattern resulting from a specific mechanism of force. This pattern is characterized by a series of small, scattered, or linear abrasions that resemble a bird's foot or sparrow's foot.
**Why the Correct Answer is Right**
Sparrow's foot marks are typically seen in cases of blunt trauma involving a spinning or rotating object, such as a motor vehicle accident or a fall onto a rough surface. The force exerted by the object causes multiple small abrasions on the skin, creating a characteristic pattern. This type of injury is often associated with a high-speed impact, which results in the skin being scraped and abraded in multiple directions.
**Why Each Wrong Option is Incorrect**
* **Option A:** Lacerations are typically caused by a sharp object, resulting in a clean cut or tear in the skin, rather than the scattered abrasions seen in Sparrow's foot marks.
* **Option B:** Contusions, or bruises, result from blood leakage into the tissues due to blunt trauma, but they do not typically present with the characteristic pattern of Sparrow's foot marks.
* **Option C:** Avulsion injuries involve the tearing of skin or underlying tissue, often resulting in a larger, more irregular wound, rather than the small, scattered abrasions seen in Sparrow's foot marks.
**Clinical Pearl / High-Yield Fact**
Sparrow's foot marks should be considered in cases of high-speed blunt trauma, where the mechanism of injury is likely to result in a spinning or rotating object causing multiple small abrasions.
**Correct Answer: C. Contusions are typically caused by a blunt object hitting the skin, resulting in blood leakage into the tissues.