Types of Sensory Receptors

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Pacinian Corpuscle
- Located in skin and fascial tissue
- Sensitive to rapid touch and vibration
- Adapts incredibly fast, at a rate of 1/100th of a second
Ruffini’s Corpuscle
- Consists of multibranched encapsulated endings
- Primarily responsible for sensing prolonged touch and deep pressure
- Located in joints and adapted slowly
Merkel’s Disc
- Found in expanded tip tactile receptors on fingertips and hairy skin
- Forms structures known as touch domes
- Detects light, sustained touch and texture
- Adaptation speed is slower compared to other receptors
Meissner’s Corpuscle
- Located in non-hairy skin, specifically fingertips and lips
- Sensitive to gentle movements across the skin surface
- Responds to low frequency vibrations, adapting in a fraction of a second
Free Nerve Endings
- Present in skin and cornea of the eye
- Sensitive to touch, pressure, and pain
- Adaptation speed is long, allowing for sustained responses