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Questions and Answers
Which of the following is NOT a type of receptor involved in somatic sensation?
Which of the following is NOT a type of receptor involved in somatic sensation?
What is the function of lateral inhibition in sensory perception?
What is the function of lateral inhibition in sensory perception?
Which of the following is NOT a modality of somatic sensation?
Which of the following is NOT a modality of somatic sensation?
Where are the cell bodies of the first order sensory neurons located?
Where are the cell bodies of the first order sensory neurons located?
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Which part of the brain is involved in the perception of sensation?
Which part of the brain is involved in the perception of sensation?
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Study Notes
Somatic Sensation Receptors
- Mechanoreceptors: Detect mechanical stimuli like touch, pressure, vibration, and stretch.
- Thermoreceptors: Detect temperature changes, both heat and cold.
- Nociceptors: Detect painful stimuli, including tissue damage and extreme temperatures.
- Proprioceptors: Detect body position and movement.
Lateral Inhibition
- Enhances contrast and sharpness of sensory perception.
- Lateral inhibition works by inhibiting the activity of neighboring neurons.
- When a sensory neuron is stimulated, it inhibits its neighboring neurons. This creates a "lateral" inhibition, which helps to isolate the signal and improve the contrast and sharpness of the perceived stimulus.
Somatic Sensation Modalities
- Touch: Sense of pressure and texture.
- Temperature: Senses of heat and cold.
- Pain: Signal of tissue damage or potential harm.
- Proprioception: Awareness of body position and movement.
First Order Sensory Neuron Cell Bodies
- Located in the dorsal root ganglia (DRG) of the spinal cord.
Perception of Sensation Brain Region
- Somatosensory cortex: Located in the parietal lobe of the brain, receives and processes sensory information from the body.
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Description
Test your knowledge of sensory physiology with this quiz! Explore topics such as functional properties of sensory receptors, receptive fields, two-point discrimination, lateral inhibition, adaptation modalities, ascending tracts, and somatosensory cortex. Recommended reading materials are also provided.
