Neural Integration I: Sensory Pathways and the Somatic Nervous System. Martini Chapter 15 March 2008. General Senses. Sensation of temperature, pain, touch, pressure, vibration, and proprioception Sensation : Information provided by sensory receptors to the CNS.
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Martini Chapter 15
Sensation: Information provided by sensory receptors to the CNS.
Perception: The conscious awareness of sensation.
touch, pressure, pain, special senses
chemical changes, stretching of tissues, temperature
Location of self
only in skeletal muscle, tendons, joints, ligaments, & CT coverings of bones & muscles
Classification by sensation
deformed by force
touch, pressure (BP), vibration, stretch, itch
chemicals in solution
Smell, taste, blood chemistryGeneral Senses
Keep in mind:
The perception of pain may be gone, but the stimulus remains.
3 major groups (tonic non-adapting receptors)
First-Order Neuron (DRG, CN)
2 spinal tracts:
proportions of homunculus relate to number of motor units in region
hand and mouth large because they have many motor units for fine motor control