23. Split-brain patients cannot verbally identify items shown to the:

A. Left visual field
B. Right visual field
C. Both fields
D. Upper visual field

Question

23. Split-brain patients cannot verbally identify items shown to the:

A. Left visual field
B. Right visual field
C. Both fields
D. Upper visual field

BlackTom AI · Accepted Answer

Question restatement: The prompt asks which visual field, when shown an item to it, cannot be verbally identified by split-brain patients.
Option A: Left visual field. This is the correct choice because in split-brain patients, the left visual field is processed by the right hemisphere and language centers typically reside in the left hemisphere. Since the right hemisphere cannot directly communicate verbally with the left-hemisphere language centers, a person often cannot verbalize what was seen in the left visual field.
Option B: Right visual field. Items shown to the right visual field are processed by the left hemisphere, which houses language centers in most individuals, enabling verbal identification. Thus, this option describes information that usually can be verbalized, making it why this is not the correct choice for split-brain verbal inability.
Option C: Both fields. If a patient were to see items in both fields, there would be a need for interhemispheric transfer to verbal centers. However, split-brain patients typically still have the issue with the left visual field specifically; saying both fields cannot be verbalized would be inaccurate since the right field can often be named via the left hemisphere.
Option D: Upper visual field. In standard anatomy, the upper visual field maps to lower portions of the retinas and can be processed by both hemispheres depending on the specific neural pathways. The classic split-brain finding concerns the left vs. right field separation for language localization, not a general inability tied strictly to the upper field, making this choice less accurate as a general rule for verbal identification.
Synthesis: The core concept is hemispheric specialization for language and how split-brain separation prevents cross-hemispheric verbal reporting. Since language centers are typically in the left hemisphere and the left visual field projects to the right hemisphere, the item presented to the left visual field is the one that is least accessibles for articulation, explaining why this option is correct.
In short, the reasoning hinges on contralateral visual field processing and the lateralization of language to the left hemisphere, which is why items seen in the left visual field are often not verbally reportable by split-brain patients.

202570_PSYC3_73232 Final Exam: Part ONE A Multiple Choice (Remotely Proctored)

23. Split-brain patients cannot verbally identify items shown to the: A. Left visual field B. Right visual field C. Both fields D. Upper visual field

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