Greater cornua of the hyoid bone fuses with the body at what age ?
**Core Concept**
The question pertains to the ossification and development of the hyoid bone, a vital anatomical structure in the anterior part of the neck. The hyoid bone serves as a point of attachment for several muscles and is composed of a body and two pairs of cornua (greater and lesser). The development and fusion of these components are crucial for understanding the bone's overall anatomy.
**Why the Correct Answer is Right**
The greater cornua of the hyoid bone typically fuse with the body between the ages of 2 to 7 years. This process is part of the normal ossification sequence of the hyoid bone, which begins early in fetal life and continues into childhood. The fusion of the greater cornua with the body is a key milestone in the development of the hyoid bone, reflecting the bone's growth and maturation.
**Why Each Wrong Option is Incorrect**
**Option A:** This age is too early for the fusion of the greater cornua with the body, as the process begins later in fetal life and continues into early childhood.
**Option B:** This age is too late for the fusion of the greater cornua with the body, as the process is usually complete by the age of 7 years.
**Option C:** This age is not relevant to the fusion of the greater cornua with the body, as the hyoid bone's development is not significantly influenced by this factor.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the development and fusion of the hyoid bone's components can be affected by various factors, including genetic disorders and abnormal growth patterns. Understanding the normal anatomy and development of the hyoid bone is crucial for diagnosing and managing related conditions.
**Correct Answer: C. 5 years**