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Questions and Answers
What type of sensory information is carried in the anterolateral pathways?
What type of sensory information is carried in the anterolateral pathways?
- Taste and smell
- Pain, temperature, and crude touch (correct)
- Auditory and visual input
- Fine touch, vibration, and conscious proprioception
Where do conscious perceptions of sensory input ultimately reach in the CNS?
Where do conscious perceptions of sensory input ultimately reach in the CNS?
- Primary somatosensory region of the cerebral cortex (correct)
- Spinal cord
- Peripheral sensory receptors
- Cerebellum
What is the function of the posterior column–medial lemniscal pathway?
What is the function of the posterior column–medial lemniscal pathway?
- Conveying taste and smell sensations
- Conveying sensations of discriminative or fine touch, vibration, and conscious proprioception (correct)
- Conveying pain and temperature sensations
- Conveying auditory and visual input
What type of sensory input is transmitted to the cerebellum?
What type of sensory input is transmitted to the cerebellum?
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What is the function of the spinal cord in sensory pathways?
What is the function of the spinal cord in sensory pathways?
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What is the term for the ability to perceive and sense the position and movement of our body?
What is the term for the ability to perceive and sense the position and movement of our body?
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Study Notes
Sensory Pathways in the CNS
- Sensory information from peripheral sensory receptors is transmitted through a series of neurons that synapse with targets in the spinal cord, cerebral cortex, and other brain structures.
- The sensory modalities carried in these pathways include pain, temperature, tactile, and proprioceptive input.
Conscious Perception of Sensory Input
- Conscious perception of sensory input is transmitted through neuronal pathways that reach the primary somatosensory region of the cerebral cortex.
- Two somatosensory pathways ascend within the spinal cord to reach the cortex.
Somatosensory Pathways
- The anterolateral pathways convey sensations of: • Pain • Temperature • Crude touch
- The posterior column–medial lemniscal pathway conveys sensations of: • Discriminative or fine touch • Vibration • Conscious proprioception
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