Biological S
- Created by: kathleen_tara
- Created on: 28-05-18 18:47
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How do we sense touch?
- somatosensation is process that conveys info regarding body surface and its interaction with environment
- three main components
- > sensory receptors
- > somatosensory pathways
- > sensory cortex
Sensory receptors
- nature - pressure, temperature, pain
- intensity - firing rate
- duration - adaption
- loction - receptive field
Nature: mechanoreceptors
- ruffini ending
- > slow adapting, respond to skin stretch
- Merkels' disk
- > slow adapting, respond to light touch
- free nerve endings
- > detect temperature and pain
- Meissners' corpuscles
- > rapidly adapting, respond to low frequency and light touch
- Pacinian corpuscles
- > rapidly adapting, deep receptors that respond to deep pressure and high frequency
Somatosensory homunculus
- related to relative density…
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