Question

tactile receptors
which mechanoreceptor detects deep pressure?
lamellated corpuscle
tactile corpuscle
merkel cell fiber
ruffini ending

Explanation:

• Lamellated corpuscles (also known as Pacinian corpuscles) are large, encapsulated mechanoreceptors. They are located deep in the dermis, hypodermis, and some viscera. Their structure (multiple concentric layers of connective tissue around a nerve ending) makes them specialized to detect deep pressure, high - frequency vibrations (up to 500 Hz), and transient (but intense) mechanical stimuli.
• Tactile corpuscles (Meissner's corpuscles) are located in the dermal papillae (superficial dermis). They are sensitive to light touch, low - frequency vibrations (10 - 50 Hz), and fine tactile discrimination, not deep pressure.
• Merkel cell fibers (Merkel discs) are located in the stratum basale of the epidermis. They are involved in detecting light touch, texture, and edges, not deep pressure.
• Ruffini endings are located in the dermis. They detect skin stretch, joint angle changes, and sustained pressure (but not the deep, intense pressure that lamellated corpuscles detect).

Answer:

Lamellated corpuscle