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CNS: Anatomy #Cerebrum
Q1. All of the following statements regarding the cerebral cortex are TRUE EXCEPT:
It is composed predominantly of neuronal cell bodies
It reaches up to 5 mm in thickness
It contains capillaries, dendrites, and axon terminals
It is composed mainly of myelinated fibers
Q2. Regarding the internal capsule, all of the following are correct EXCEPT:
It is a band of white matter
It lies between the lentiform nucleus and thalamus
It separates the caudate nucleus from the lentiform nucleus
It contains association fibers only
Q3. All of the following are characteristics of layer IV of the cerebral cortex EXCEPT:
Composed mainly of stellate cells
Contains the external band of Baillarger
Is very prominent in the visual cortex
Contains Betz cells
Q4. Regarding pyramidal cells in layer III, all are correct EXCEPT:
They increase in size from superficial to deep
The largest cells are located in the deepest part
They are larger than Betz cells
They are small to medium in size
Q5. All of the following statements regarding the lateral sulcus are correct EXCEPT:
It separates the temporal lobe from frontal and parietal lobes
It begins as a short stem on the inferior surface
It gives rise to anterior horizontal and ascending rami
It separates the parietal lobe from the occipital lobe
Q6. The first imaginary line is best described by all EXCEPT:
It separates occipital from parietal and temporal lobes
It is a continuation of the parieto-occipital sulcus
It extends from the occipital notch to the superior surface
It separates frontal from parietal lobes
Q7. All of the following statements regarding the precentral gyrus are TRUE EXCEPT:
It lies anterior to the central sulcus
It contains the primary motor cortex
It lies between the central and precentral sulci
It is part of the parietal lobe
Q8. Regarding the parietal lobe, all are correct EXCEPT:
It lies posterior to the central sulcus
It extends to the parieto-occipital sulcus
It contains the postcentral gyrus
It is located inferior to the lateral sulcus
Q9. All of the following are features of the temporal lobe EXCEPT:
Located below the lateral sulcus
Inferior temporal sulcus is seen on the lateral surface
Superior temporal sulcus runs parallel to lateral sulcus
Inferior temporal gyrus continues onto inferior surface
Q10. All of the following statements about the cingulate gyrus are correct EXCEPT:
It lies between the callosal and cingulate sulci
It extends from anterior to posterior corpus callosum
It is part of the limbic lobe
It lies lateral to the superior frontal gyrus
Q11. Regarding the calcarine sulcus, all are correct EXCEPT:
It begins under the posterior end of the corpus callosum
It divides the occipital lobe into cuneus and lingual gyrus
It joins the parieto-occipital sulcus at an obtuse angle
It arches upward and backward toward the occipital pole
Q12. All of the following statements about the cuneus are correct EXCEPT:
It is triangular in shape
It lies above the calcarine sulcus
It is bounded inferiorly by the collateral sulcus
It lies on the medial surface of the hemisphere
Q13. All of the following are true regarding the primary motor area EXCEPT:
It is located in the posterior part of the precentral gyrus
It extends into the paracentral lobule
Lesions cause flaccid ipsilateral paralysis
Electrical stimulation causes contralateral muscle contraction
Q14. Regarding the frontal eye field, all are correct EXCEPT:
It is located mainly in the middle frontal gyrus
It controls conjugate eye movements
Lesions cause permanent paralysis of eye movements
It directs gaze toward the opposite side
Q15. All of the following regarding the primary somatosensory cortex are TRUE EXCEPT:
It occupies the postcentral gyrus
It receives input from VPL and VPM nuclei
It is responsible for initiation of voluntary movement
Lesions cause contralateral sensory loss
Q16. Damage to the superior parietal lobule results in all EXCEPT:
Astereognosis
Impaired tactile object recognition
Loss of pain sensation
Contralateral deficit
Q17. All of the following statements about the primary auditory cortex are correct EXCEPT:
It lies in Heschl’s gyri
It is located in the inferior wall of the lateral sulcus
It corresponds to Brodmann areas 41 and 42
Lesions cause expressive aphasia
Q18. All of the following regarding Wernicke’s area are correct EXCEPT:
It is located in the posterior superior temporal gyrus
It is involved in speech comprehension
Lesions cause non-fluent aphasia
Speech remains fluent but meaningless
Q19. All of the following statements regarding the primary visual cortex are correct EXCEPT:
It is located around the calcarine sulcus
It occupies the cuneus and lingual gyrus
It contains the line of Gennari
It lies in the inferior temporal gyrus
Q20. All of the following are features of Broca’s aphasia EXCEPT:
Non-fluent speech
Preserved comprehension
Inability to form words
Fluent but meaningless speech
Q21. Regarding the motor homunculus, all are correct EXCEPT:
Representation is contralateral
The face is represented superiorly
Hand occupies a large cortical area
Perineum is represented on medial surface
Q22. All of the following are long association fibers EXCEPT:
Superior longitudinal fasciculus
Uncinate fasciculus
Arcuate fasciculus
Corpus callosum
Q23. All of the following regarding commissural fibers are correct EXCEPT:
They connect corresponding cortical areas
They arise from layer III
Corpus callosum is the largest commissure
They connect cortex to thalamus
Q24. All of the following are parts of the corpus callosum EXCEPT:
Genu
Isthmus
Uncus
Splenium
Q25. All of the following regarding the internal capsule are correct EXCEPT:
It contains both afferent and efferent fibers
It lies between thalamus and lentiform nucleus
The anterior limb lies between caudate and lentiform nuclei
It contains only cortico-petal fibers
Q26. The genu of the internal capsule is best described as:
Between thalamus and lentiform nucleus
The junction between anterior and posterior limbs
The posterior part carrying optic radiation
Located lateral to the claustrum