Meissner’s corpuscles present in which layer of skin?
**Core Concept**
Meissner's corpuscles are a type of mechanoreceptor found in the skin, responsible for detecting light touch and changes in texture. These sensory receptors are essential for tactile perception, allowing us to feel and identify various surfaces, shapes, and objects.
**Why the Correct Answer is Right**
Meissner's corpuscles are located in the dermal papillae of the epidermis, specifically in the _stratum basale_ and _stratum spinosum_ layers. This positioning enables them to respond to gentle touch and pressure, facilitating fine motor control and sensory feedback. The nerve endings within Meissner's corpuscles are unmyelinated and contain type I sensory fibers, which transmit signals to the central nervous system.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Meissner's corpuscles are not found in the _stratum corneum_, the outermost layer of the epidermis, which is primarily responsible for barrier function and water retention.
**Option B:** This option is incorrect because Pacinian corpuscles, not Meissner's corpuscles, are found in the _hypo dermis_, a deeper layer of skin that responds to pressure and vibration.
**Option C:** This option is incorrect because Merkel's discs, not Meissner's corpuscles, are located in the _stratum basale_ and _stratum spinosum_ layers, but they are involved in detecting sustained pressure and texture.
**Clinical Pearl / High-Yield Fact**
Meissner's corpuscles are highly sensitive to changes in temperature and humidity, which can affect their function and contribute to sensory disturbances in certain skin conditions. Understanding the anatomy and physiology of these mechanoreceptors is essential for diagnosing and managing conditions related to tactile perception.
**Correct Answer: C. dermal papillae of the epidermis**