Which sensory receptor is primarily responsible for detecting deep pressure and vibrations?

- The sensory receptor primarily responsible for detecting deep pressure and vibrations is the Pacinian corpuscle.
- These receptors are large, onion-shaped structures located deep within the dermis and in various other tissues such as the pancreas and joints.
- They are highly sensitive to rapid changes in pressure and high-frequency vibrations, making them essential for perceiving sensations like textures transmitted through tools or the feeling of vibration from machinery.

In contrast:
- Meissner's corpuscles are located closer to the skin surface and are specialized for detecting light touch and low-frequency vibrations.
- Merkel's discs provide information about sustained touch and pressure, especially related to shape and texture.
- Ruffini endings detect skin stretch and sustained pressure, playing a role in proprioception.

Therefore, the Pacinian corpuscles are the primary receptors for detecting deep pressure and vibrations due to their unique structure and location.

Reference: Guyton and Hall Textbook of Medical Physiology, 14th Edition, Chapter 48 - Somatic Sensory Receptors and Pathways