Tactile Sensation

by Jalal ahmd

1. In the name of Almighty Allah The Most Merciful, Glorious And the Creator of this Mysterious Universe

2. TOPIC: DETECTION AND TRANSMISSION OF TACTILE SENSATION JALAL AHMAD

3. #-Interrelation of tactile sensation of touch, pressure and vibration. #-Tactile Receptors. #-Transmission of Tactile Sensation. #-Detection of Vibration, Tickle and Itch. CONTENTS:

4. Interrelation among sensation of Touch, Pressure and Vibration Touch : Receptors in the skin and tissue immediately beneath the skin. Pressure : sensation result from deformation of deeper tissue. Vibration : result from repetitive sensory signals but receptors are same as for touch and pressure.

5. Tactile Receptors 1 st … Free Nerve Endings.

6. Tactile Receptors 2 nd … Meissner’s Corpuscle.

7. Tactile Receptors 3 rd … Expanded tip Tactile Receptors. E.g. Merkel Discs. Iggo Dome Receptor

8. Tactile Receptors 4 th … Hair End-Organ.

9. Tactile Receptors 5 th … Ruffini’s Endings.

10. Tactile Receptors 6 th … Pacinian Corpuscle.

11. Transmission of Tactile Signals

12. Detection of Vibration: Pacinian Corpuscle: 30-800 cycles/sec Meissner’s Corpuscle: 2-80 cycles/sec Detection of Tickle And Itch by Free Nerve Ending: Sensations are transmitted by very small type C nerve fiber.