Spring ligament is also called
**Core Concept**
The spring ligament is a fibrocartilaginous ligament that plays a crucial role in supporting the medial (inner) aspect of the foot, particularly the head of the talus. It is a vital structure in maintaining the medial longitudinal arch of the foot.
**Why the Correct Answer is Right**
The spring ligament is also known as the plantar calcaneonavicular ligament. It is a strong, flat ligament that connects the calcaneus (heel bone) to the navicular bone, thereby providing essential support to the medial arch of the foot. This ligament helps to distribute pressure evenly and prevents the talus from sinking into the foot, thereby maintaining the medial arch. The spring ligament is a key component of the medial longitudinal arch, and its integrity is crucial for normal foot mechanics.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not accurately describe the spring ligament.
* **Option B:** This is incorrect because it is not a recognized alternative name for the spring ligament.
* **Option D:** This is incorrect because it refers to a different ligament altogether.
**Clinical Pearl / High-Yield Fact**
The spring ligament is often implicated in conditions such as flat foot and medial arch collapse, particularly in patients with diabetes or rheumatoid arthritis. It is essential to recognize the role of the spring ligament in maintaining foot mechanics and to identify potential abnormalities in this ligament during clinical examination.
**Correct Answer: C. Plantar calcaneonavicular ligament.**