Which layer of the skin is primarily responsible for sensation?

• A. Hypodermis
• B. Dermis
• C. Epidermis
• D. Stratum corneum

Answer: (B)

The dermis is the layer of the skin primarily responsible for sensation due to its rich supply of nerves and sensory receptors. It contains various structures including tactile corpuscles, which are specialized for detecting light touch, as well as Ruffini endings that respond to stretch and pressure. Additionally, the dermis houses pain receptors (nociceptors) and temperature receptors (thermoreceptors), making it essential for the skin's sensory functions.

While the epidermis forms the outermost protective barrier of the skin, it has a limited role in sensation itself. The hypodermis, which lies beneath the dermis, primarily serves as a layer for insulation and padding and does not have the same concentration of sensory receptors. The stratum corneum, being the outermost layer of the epidermis, is comprised of dead skin cells and functions mainly in barrier protection rather than in sensory perception. Hence, the dermis stands out as the primary layer responsible for processing sensory information.