Mind map
tactile receptors
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tactile receptors
Meissner corpuscles
- Egg-shaped mass of dendrites enclosed by a capsule of connective tissue.
- Rapidly adapting receptors
- Found in the dermal papillae of hairless skin, where one's ability to discern spatial location of touch is highly developed.
hair root plexuses
- Rapidly adapting touch receptors found in the hairy skin
- Free nerve endings wrapped around hair follicles
- Detect movements on the skin surface that disturb hairs
Merkel discs
- Also known as type I cutaneous mechanoreceptors
- Slowly adapting touch receptors
- Saucer-shaped, flattened free nerve endings.
- Found in the fingertips, hands, lips, and external genitalia.
Ruffini corpuscles
- Also called as type II cutaneous mechanoreceptors
- Elongated, encapsulated receptors.
- Located deep in the dermis and in ligaments and tendons
- Found in the hands, and soles
- very slowly adapting, therefore, it's important for signaling continuous states, such is heavy prolonged touch and pressure signals
pacinian corpuscles
- Large oval structure composed of a multilayered connective tissue capsule that encloses a dendrite
- Fast adapting receptors
- Found around joints, tendons, and muscles; in the periosteum, mammary glands, external genitalia, pancreas and urinary bladder.
- respond to acceleration and deceleration of joints during movement
free nerve endings
- found everywhere in the skin and in many other tissue.
- can detect pressure and touch
- Thermoreceptorsare free nerve endings
- cold receptors, more in NO.
- warm receptors
- Free nerve endings and Ruffini corpuscles in the capsules of joints respond to pressure.
