Chapter 51: The Eye: III. Central Neurophysiology of Vision

Chapter 51: The Eye: III. Central Neurophysiology of Vision

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

1. Which of the following statements best describes the function of the lateral geniculate nucleus (LGN)?
2. The LGN is the site of convergence of the signals from the two eyes
3. The LGN controls the involuntary fixation process
4. The LGN controls the voluntary fixation process
5. The LGN provides a “gate control” for information destined to be received by the primary visual cortex

ANS: D

2. Ganglion cells attached to photoreceptors located on the nasal portion of each retina terminate in which of the following structures?
3. The contralateral lateral geniculate nucleus
4. The calcarine fissure of the occipital cortex
5. The contralateral medial geniculate nucleus
6. The ipsilateral lateral geniculate nucleus

ANS: A

3. Injury to the superior cervical ganglion on the left side of the neck could result in which of the following symptoms?
4. Presbyopia in the left eye
5. A dilated pupil in the left eye
6. Blindness in the left eye
7. A constricted pupil in the left eye

ANS: D

4. The women of ancient Egypt who put an extract from the Belladonna plant into their eyes for cosmetic reasons would most likely have experienced the following decrement is visual function?
5. Difficulty in seeing objects close at hand
6. Difficulty in seeing objects at a distance
7. Difficulty in adjusting to low light conditions
8. Difficulty in moving their eyes in a coordinated fashion

ANS: A