EBK HUMAN BIOLOGY
11th Edition
ISBN: 9780100545939
Author: MCMILLAN
Publisher: YUZU
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Chapter 14, Problem 4CT
Larry goes to the doctor complaining that he can’t see the right side of the visual field with either eye. Where in the visual signal-processing pathway is Larry’s problem occurring?
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Students have asked these similar questions
Blindsight is the condition in which someone with damage in the primary visual cortex reports that they cannot see an object, but can usually guess what that object is. This means that some visual representation must reach the frontal speech area. What non-thalamic pathway might do that?
Question 8 options:
A)
The pathway through the suprachiasmatic nucleus
B)
The dorsal visual pathway
C)
The pathway through the superior colliculus
D)
The magnocelluar or M pathway
Three patients have suffered destruction of different portions of their visual pathway. Patient 1 has lost the right optic tract, patient 2 has lost the nerve fibers that cross at the optic chiasm, and patient 3 has lost the left occipital lobe. Draw a picture of what each person would perceive through each eye when looking at a white wall.
Mr. Ally went to the eye doctor and complained about dark areas in his vision. He had never noticed it before. There is no pain.
What is the diagnosis?
Explain the reason behind floaters and dark areas in the visual field.
How should the doctor treat Mr. Ally?
Chapter 14 Solutions
EBK HUMAN BIOLOGY
Ch. 14 - When a receptor cell detects a specific kind of...Ch. 14 - Name six categories of sensory receptors and the...Ch. 14 - How do somatic sensations differ from special...Ch. 14 - Explain where free nerve endings are located in...Ch. 14 - Prob. 5RQCh. 14 - What are the stimuli for taste receptors?Ch. 14 - How do smell signals arise and reach the brain?Ch. 14 - Label the parts of the ear:Ch. 14 - In the ear, sound waves cause the tympanic...Ch. 14 - Label the parts of the eye:
Ch. 14 - How does the eye focus the light rays of an image?...Ch. 14 - A __________is a specific form of energy that can...Ch. 14 - Awareness of a stimulus is called a ________.Ch. 14 - ____________ is understanding what particular...Ch. 14 - A sensory system is composed of __________. a....Ch. 14 - ___________detect energy associated with changes...Ch. 14 - Detecting substances present in the body fluids...Ch. 14 - Which of the special senses is based on the...Ch. 14 - Rods differ from cones in the following ways: a....Ch. 14 - The outer layer of the eye includes...Ch. 14 - The inner layer of the eye includes the...Ch. 14 - Your visual field is ______________. a. a...Ch. 14 - Match each of the following terms with the...Ch. 14 - Prob. 1CTCh. 14 - Prob. 2CTCh. 14 - Jill is diagnosed with sensorineural deafness, a...Ch. 14 - Larry goes to the doctor complaining that he cant...Ch. 14 - In a rock climber like the man pictured in Figure...
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- Jane makes an appointment with the optometrist for a vision test. Her test results for visual acuity are reported as 20/15. What does this test result mean? Is a rating of 20/20 better or worse?arrow_forwardlabelarrow_forwardWhy is more of the visual cortex devoted to your central vision then to your peripheral vision? Don’t overthink this!arrow_forward
- Damage to the right optic nerve would result in what type of visual field deficit? Question 6 options: A) Blindness in the majority of the left visual field (both binocular and monocular) B) Blindness in the majority of the right visual field (both binocular and monocular) C) Blindness in the majority of both monocular visual fields D) Blindness in the binocular visual field E) Blindness in the majority of the right monocular visual field F) Blindness in the majority of the left monocular visual fieldarrow_forwardIf a patient suffers visual impairment only in one eye, why must the damage be located in the visual pathway prior to the optic chiasma?arrow_forwardMany people think that vision is processed solely in the occipital lobe, and language in the temporal. Discuss why this is a poor heuristic and name at least three areas of major processing overlap in the frontal and/or parietal lobes.arrow_forward
- Starting with the optic nerve, trace the action potential from the right temporal visual field to the visual cortex. What is the possible effect of lesions of the visual pathway?arrow_forwardThe lateral geniculate nuclei (LGN)are 6-layer structures in each hemisphere, which receive input from the retina from the ipsilateral and contralateral eyes. What is true of the layer distribution of the LGN regarding how they receive inputs from the eyes? layers 1, 4 and 6 from contralateral eye layers 4,5 and 6 from ipsilateral eye layers 2,3 and 5 from ipsilateral eye a) and c)arrow_forwardA patient comes into the ER complaining of loss of vision. When tested, he seems to be missing visual information from both left and right temporal hemifields. What part of the visual pathway is most likely damaged?arrow_forward
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