CDT Anatomy & Physiology Fundamentals 2 — Questions and Answers
Question 1: Which cortical region is primarily responsible for processing the visual form of written words during reading?
- Broca's area
- Visual word form area (VWFA) in the left fusiform gyrus (Correct answer)
- Wernicke's area
- Angular gyrus
Correct answer: Visual word form area (VWFA) in the left fusiform gyrus
The visual word form area, located in the left fusiform gyrus, is specialized for recognizing the visual patterns of written words and is often called the 'letterbox area.'
Question 2: The corpus callosum's role in reading is best described as:
- Storing long-term phonological memories
- Transferring visual information between the two cerebral hemispheres (Correct answer)
- Regulating attention during decoding tasks
- Producing subvocal speech during silent reading
Correct answer: Transferring visual information between the two cerebral hemispheres
The corpus callosum is the large white matter tract that connects the left and right cerebral hemispheres, enabling the transfer of visual and linguistic information during reading.
Question 3: Which cranial nerve is responsible for conveying auditory signals from the cochlea to the brainstem?
- Cranial nerve V (trigeminal)
- Cranial nerve VII (facial)
- Cranial nerve VIII (vestibulocochlear) (Correct answer)
- Cranial nerve X (vagus)
Correct answer: Cranial nerve VIII (vestibulocochlear)
Cranial nerve VIII, the vestibulocochlear nerve, carries both auditory (cochlear branch) and balance (vestibular branch) information from the inner ear to the brainstem.
Question 4: The planum temporale, often asymmetric and larger on the left in most people, is associated with:
- Visual-spatial processing
- Language and phonological processing (Correct answer)
- Motor planning for speech articulation
- Emotional regulation
Correct answer: Language and phonological processing
The planum temporale, a triangular region on the superior temporal lobe, is associated with language and phonological processing and is typically larger in the left hemisphere.
Question 5: In individuals with dyslexia, neuroimaging studies most consistently show reduced activation in which region during phonological tasks?
- Right frontal lobe
- Left temporoparietal cortex (Correct answer)
- Right occipital lobe
- Left motor cortex
Correct answer: Left temporoparietal cortex
Research consistently shows that individuals with dyslexia demonstrate reduced activation in the left temporoparietal cortex, particularly during phonological decoding tasks.
Question 6: What is the primary function of myelin sheaths surrounding axons in the central nervous system?
- Providing structural support to neuron cell bodies
- Speeding up the conduction of nerve impulses (Correct answer)
- Synthesizing neurotransmitters at synapses
- Regulating blood flow to neural tissue
Correct answer: Speeding up the conduction of nerve impulses
Myelin sheaths insulate axons and enable saltatory conduction, dramatically increasing the speed at which electrical signals travel along nerve fibers.
Question 7: Which structure connects Broca's area to Wernicke's area and is critical for phonological processing?
- Internal capsule
- Uncinate fasciculus
- Arcuate fasciculus (Correct answer)
- Superior longitudinal fasciculus I
Correct answer: Arcuate fasciculus
The arcuate fasciculus is the white matter tract that connects Broca's area (frontal) with Wernicke's area (temporal), and its integrity is essential for phonological processing and reading.
CDT Anatomy & Physiology Fundamentals 2
Which cortical region is primarily responsible for processing the visual form of written words during reading?