An end corpuscle, also known as an end-bulb or an end-organ, refers to a specialized sensory receptor found in various parts of the body, predominantly in the skin and mucous membranes. It is responsible for detecting and relaying specific sensory information to the brain, thereby allowing individuals to experience various tactile sensations.
End corpuscles are commonly found in sensitive areas such as the fingertips, lips, and genitalia. They consist of nerve endings that are encapsulated within connective tissue, enhancing their sensitivity and responsiveness to stimuli. These specialized receptors convert mechanical stimuli such as pressure, vibration, and stretching into electrical signals that can be interpreted by the brain.
The specific types of end corpuscles include Meissner's corpuscles, Pacinian corpuscles, Merkel cells, and Ruffini corpuscles, each with its distinct characteristics and sensitivity. Meissner's corpuscles, for instance, are concentrated in the fingertips and are responsible for detecting light touch and texture. Pacinian corpuscles, on the other hand, are found in deeper layers of the skin and respond to deep pressure and high-frequency vibrations.
Overall, end corpuscles play a critical role in the somatosensory system, enabling individuals to perceive and interpret the world through touch. Their sensitivity and distribution throughout the body allow for a wide range of tactile experiences and contribute to our overall sensory perception.
