In injury to head of fibula, all are involved except
## Core Concept
The head of the fibula is a common site for fractures, and understanding the structures nearby is crucial. The **common peroneal nerve** (also known as the common fibular nerve) wraps around the lateral aspect of the fibular neck, which is close to the head of the fibula. This nerve is particularly susceptible to injury in fractures of the fibular head or neck.
## Why the Correct Answer is Right
The **common peroneal nerve** is closely associated with the neck of the fibula, not the head. The structures typically involved in an injury to the head of the fibula include the **lateral collateral ligament** of the knee and potentially the **tibial nerve** or **popliteal vessels** due to their proximity, but most directly and commonly, concern is with structures immediately adjacent.
## Why Each Wrong Option is Incorrect
- **Option A:** The lateral collateral ligament could be involved due to its attachment near the head of the fibula.
- **Option B:** This option likely involves a structure near the head of the fibula; however, without specifics, we infer based on common injury patterns.
- **Option D:** Similarly, another structure that could plausibly be involved.
## Why the Correct Answer is Correct (Specifics on Common Peroneal Nerve)
The **common peroneal nerve** is more closely associated with the **neck** of the fibula rather than the **head**. This nerve can be easily damaged in fractures of the fibular neck.
## Clinical Pearl / High-Yield Fact
A key clinical point to remember is that the common peroneal nerve is particularly at risk in **fibular neck fractures**, not the head. This can lead to **foot drop** due to weakness of the muscles involved in dorsiflexion.
## Correct Answer: C. common peroneal nerve.