Laser Technician (International Board of Electrologist Certification) IBEC Board Exam

What type of corpuscle is found in the papillary layer that is sensitive to touch?

1. Meissner

2. Merkel

3. Pacinian

4. Krause

The correct answer is: Meissner

The type of corpuscle found in the papillary layer of the skin that is sensitive to touch is Meissner's corpuscle. These specialized nerve endings are densely located in areas of the skin that are highly sensitive, such as the fingertips and palms. Meissner's corpuscles are responsible for detecting light touch and changes in texture, making them essential for our tactile sense. Located within the papillary layer, Meissner's corpuscles are encapsulated structures that respond to mechanical deformation. When pressure is applied to the skin, these corpuscles are activated, leading to the sensation of touch. Their proximity to the surface of the skin allows them to respond rapidly to stimuli, which is why they play a crucial role in our ability to perceive fine details and movements on the skin's surface. Other types of corpuscles, such as Merkel cells, are indeed involved in touch sensation, but they are not classified as corpuscles; rather, they are specialized epithelial cells. Pacinian corpuscles, on the other hand, are found deeper in the dermis and are more responsive to deep pressure and vibration rather than light touch. Krause end bulbs are involved in the sensation of cold and are not primarily associated with touch sensitivity. This specialization illustrates the complexity