**Question:** Receptor of joint capsule and ligaments is

A. Mechanoreceptors
B. Thermoreceptors
C. Proprioceptors
D. Chemoreceptors

**Core Concept:**

In the context of the musculoskeletal system, the joint capsule and ligaments play crucial roles in maintaining joint stability, protection, and communication with the central nervous system. Joint capsule is a thin, elastic connective tissue layer surrounding the joint, while ligaments are thick, tough connective tissue bands that connect bones to other bones at joints. These structures contain specific sensory receptors that transmit information about joint position, movement, and tension to the central nervous system.

**Why the Correct Answer is Right:**

The correct answer, C. Proprioceptors, are specialized sensory receptors found in the joint capsule and ligaments. They are responsible for sensing joint position, movement, and tension. This information is crucial for maintaining balance and coordination of movements, as well as detecting changes in joint stability.

**Why Each Wrong Option is Incorrect:**

A. Mechanoreceptors are sensory receptors that respond to mechanical stimuli, such as touch and pressure. Although they can detect joint movement, they are not specific to joint receptors.
B. Thermoreceptors are specialized sensory receptors that respond to temperature changes, not joint-related information.
D. Chemoreceptors are responsible for detecting chemical substances and changes in the environment, not joint-related information.

**Clinical Pearl:**

Understanding the role of proprioceptors in joint function is essential for physicians, surgeons, and other healthcare professionals. Proprioceptors help in maintaining balance, coordination, and detecting joint instability, which are crucial for diagnosis, treatment, and rehabilitation of musculoskeletal disorders.