All are true about intermuscular spaces except

## Core Concept
The intermuscular spaces, also known as intermuscular planes or fascial planes, are potential spaces between muscles or groups of muscles. These spaces are significant in anatomy and surgery as they can be utilized for various medical procedures, including injections and surgical dissections. Understanding the anatomy of these spaces is crucial for medical professionals.

## Why the Correct Answer is Right
The correct answer cannot be directly assessed without the specific details of each option (A, B, C, D). However, in general, intermuscular spaces are characterized by their location between muscles and are often utilized for surgical and diagnostic purposes. For instance, the intermuscular spaces in the thigh, such as the anterior and posterior compartments, are defined by the fascia lata and contain various muscles, nerves, and vessels.

## Why Each Wrong Option is Incorrect
- **Option A:** Without specific details, it's challenging to directly refute this option. However, if option A describes a known characteristic or location of an intermuscular space accurately, it wouldn't be incorrect.
- **Option B:** Similarly, this option's accuracy depends on its content. If it correctly describes an aspect of intermuscular spaces, it wouldn't be the incorrect statement.
- **Option C:** This option would be incorrect based on the question's context, implying it does not accurately describe a characteristic of intermuscular spaces.
- **Option D:** Like options A and B, without specifics, it's hard to directly address why it's incorrect. However, if it inaccurately describes intermuscular spaces, it would be considered wrong.

## Clinical Pearl / High-Yield Fact
A key point to remember is that intermuscular spaces are utilized in clinical practice for procedures like compartment syndrome releases and for the administration of certain injections. Understanding the anatomy of these spaces can help prevent complications during surgical procedures.

## Correct Answer: C.

✓ Correct Answer: D. The lateral boundary of lower triangular intermuscular space is formed by the lateral margin of the long head of the triceps brachii muscle