Angular movements are sensed by –
**Core Concept**
Angular movements, such as rotation and flexion/extension, are essential components of motor function. The vestibular system and proprioception are responsible for sensing these movements. Proprioception involves the perception of the position and movement of body parts, while the vestibular system detects changes in head position and movement.
**Why the Correct Answer is Right**
Angular movements are primarily sensed by the proprioceptive receptors in muscles, tendons, and joints. These receptors, particularly the muscle spindle receptors, are sensitive to changes in muscle length and velocity, allowing for the detection of angular movements. The information from these receptors is transmitted to the central nervous system, where it is integrated with other sensory inputs to generate a sense of movement and position. In addition, the vestibular system, located in the inner ear, also plays a role in sensing angular movements, particularly those involving the head.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a particular type of movement or receptor system.
* **Option B:** This option is incorrect because it is not a recognized type of receptor or sensory system responsible for sensing angular movements.
* **Option C:** This option is incorrect because it is a type of sensory input, but not the primary receptor system responsible for sensing angular movements.
**Clinical Pearl / High-Yield Fact**
The proprioceptive system is essential for maintaining posture and balance, and is often affected in conditions such as Parkinson's disease and peripheral neuropathy. In these conditions, patients may experience difficulty with balance and coordination, highlighting the importance of proprioception in motor function.
**Correct Answer: C. Proprioceptors in muscles, tendons, and joints.**