Scientists discover new pain-sensing organ in the skin

The video discusses the traditional understanding of mechanical pain perception through nerve cell endings in the epidermis and introduces a new discovery by researchers at Sweden's Karolinska Institute. They found a sensory organ, the nociceptive glio-neural complex, between the skin's layers, which is sensitive to mechanical stimuli. The organ's functionality was tested by genetically modifying mice to respond to light stimulation, resulting in pain-indicative behaviors.

What was the traditional belief about how mechanical pain is perceived?

• Through nerve cell endings with a protective layer

• By temperature-sensitive nerve cells

• Via a network of glial cells

• Through sensitive nerve cell endings lacking a protective layer

What is the newly discovered sensory organ called?

• Pain receptor organ

• Nociceptive neural network

• Glial sensory complex

• Nociceptive glio-neural complex

Which type of stimuli is the nociceptive glio-neural complex most sensitive to?

• Cold

• Mechanical stimuli like pinpricks

• Chemical stimuli

• Heat

How did researchers test the functionality of the nociceptive glio-neural complex?

• By applying electrical stimuli

• By genetically modifying mice to respond to light

• By using chemical irritants

• By exposing mice to extreme temperatures

What behavior did mice exhibit when the nociceptive glio-neural complex was stimulated by light?

• Pain-indicative behaviors like lifting and licking their feet

• No noticeable change

• Aggressive behavior

• Increased appetite