Vision pathways of the sensory systems

Pathways of the Sensory Systems

Continuing from the sense of touch last week, there are four additional senses: hearing, taste, smell, and vision. For any of these senses, the information needs to travel from the external environment, be transduced by sensory receptors, and then be transmitted to the brain. Along the way, information from most senses is filtered by passing through the thalamus before reaching the specialized sensory areas in the brain.

For this Discussion, you will explore the pathways from the environment to the brain for an assigned sense. Then you will consider a clinical condition in which that sensory system does not work correctly.

Note: For this Discussion, you are required to complete your initial post before you will be able to view and respond to your colleagues’ postings. Begin by clicking on the Post to Discussion Question link, and then select Create Thread to complete your initial post. Remember, once you click on Submit, you cannot delete or edit your own posts—and cannot post anonymously. Please check your post carefully before clicking on Submit.

To prepare:

  • To ensure that all five senses are considered in this class, you will be assigned a sense based on your last name.
    • Last Name A – E: Touch
    • Last Name F – J: Hearing
    • Last Name K – N: Smell
    • Last Name O – R: Taste
    • Last Name S – Z: Vision
  • For your assigned sense, review this week’s Learning Resources and focus on how signals from the environment are received in the brain.
  • Research a clinical condition involving the impairment of your assigned sense.

By Day 3

Post a response to the following:

For your assigned sense:

  • Describe the pathways from the environment to the brain.
  • Identify and describe the receptors that transduce the signal from the environment. Then name and briefly describe the path that this sensory information takes from the receptors to the central nervous system.
  • Include and describe the region of the brain where this signal terminates.
  • Finally, describe a clinical condition in which this sense is impaired and the biological reason for the impairment.

Support your posting with specific references from literature in the Walden Library and Learning Resources.


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