Biology › Section N · Nervous and sensory systems › Topic N.5
Sensory processes and touch
Light, sound, a chemical on the tongue and a fingertip brushing a sleeve all reach you the same way: as trains of action potentials. This topic follows that conversion from stimulus to perception, then looks closely at touch, the sense spread across your whole skin.
In this topic
- Turning the world into nerve signals
- Receptors: two designs
- Reception and transduction
- Encoding: what, where, how long, how strong
- Perception and the just-noticeable difference
- Worked example: predicting a weight threshold
- The receptors of the skin and body
- Four touch specialists
- Worked example: reading a two-point test
- Pain: nociception and perception
- Common mistakes to avoid
- Key takeaways
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