Block 5 Neuro Atlas Ch 7 W Expl
- 1.The MRI of a 66-year-old man shows a tumor 2.0 cm in diameter located in the lateral wall of the atrium of the lateral ven-tricle.Which of the following structures does this lesion mostlikely damage?
- A.
Corticonuclear fibers
- B.
Corticospinal fibers
- C.
Optic radiations
- D.
Pulvinar nucleus
- E.
Splenium,corpus callosum
- 2.Which of the following structures is clearly seen in coronal and axial brain slices, and in many MRIs, in sagittal planes extending from the midline laterally through the basal nuclei?
- A.
Anterior commissure
- B.
Column of the fornix
- C.
Genu of the internal capsule
- D.
Optic chiasm
- E.
Posterior commissure
- 3.The MRI of a 59-year-old woman with movement and personality disorders and with cognitive dysfunction shows a large anterior horn of the lateral ventricle. The attending physician suspects that her disease has resulted in loss of brain tissue inthe lateral wall of the anterior horn. A loss of which of the following structures would result in this portion of the ventricular system being enlarged?
- A.
Body of the caudate nucleus
- B.
Head of the caudate nucleus
- C.
Lenticular nucleus
- D.
Pulvinar nucleus (i)
- E.
Septum pellucidum and fornix
- 4.The axial MRI of a 54-year-old man shows an arteriovenous malformation located between the thalamus and lenticular nucleus. Which of the following structures is probably most affected by this malformation?
- A.
Anterior commissure
- B.
Anterior limb of the internal capsule
- C.
Extreme capsule
- D.
Retrolenticular limb of the internal capsule
- E.
Posterior limb of the internal capsule
- 5.In a sagittal MRI, and in a sagittal brain slice, both taken just off the midline (2–4 mm), which of the following structures would be clearly evident immediately caudal to the anterior commissure?
- A.
Column of the fornix
- B.
Lamina terminalis
- C.
Mammillothalamic tract
- D.
Optic chiasm
- E.
Precommissural fornix
- 6.The coronal MRI of a 2-year-old child shows a 2.0-cm diameter tumor in the rostral tip of the temporal (inferior) horn of the lateral ventricle. It is possibly arising from the choroid plexus in this area of the ventricle. In addition to the hippocampus, this tumor is most likely impinging on which of the following structures?
- A.
Amygdaloid nucleus
- B.
Body of the caudate nucleus
- C.
Hypothalamus
- D.
Optic radiations
- E.
Putamen
- 7.Which of the following structures is located immediately internal to the crus cerebri and appears as a dark shade of grey(hypointense) in a sagittal T1-weighted MRI?
- A.
Brachium of the inferior colliculus
- B.
Periaqueductal grey
- C.
Pretectal area
- D.
Red nucleus
- E.
Substantia nigra
- 8.An 81-year-old man is brought to the emergency department following a fall while walking in the park.The examination reveals mild confusion and memory loss, but no obvious motoror sensory deficits. MRI shows an old infarct in the territory of the thalamus served by the thalamoperforating artery. Which of the following nuclei is most likely involved in this lesion?
- A.
Centromedian
- B.
Medial geniculate
- C.
Ventral anterior
- D.
Ventral posterolateral
- E.
Ventral posteromedial
- 9.Which of the following nuclei is located within the internal medullary lamina and may be visible in an axial MRI in eitherT1- or T2-weighted images?
- A.
Centromedian
- B.
Dorsomedial
- C.
Pulvinar
- D.
Ventral anterior
- E.
Ventral lateral
- 10.The sagittal MRI of a 23-year-old woman shows a mass in the right interventricular foramen (possibly a colloid cyst); the right lateral ventricle is enlarged. Based on its location, this mass is most likely impinging on which of the following structures?
- A.
Anterior nucleus of thalamus
- B.
Posterior limb of internal capsule
- C.
Habenular nucleus
- D.
Head of caudate nucleus
- E.
Lamina terminalis
- 11.The sagittal MRI of a 42-year-old woman taken adjacent to the midline shows a round structure immediately rostral to the interpeduncular fossa on the inferior surface of the hemisphere. Which of the following most likely represents this elevation?
- A.
Anterior commissure
- B.
Basilar pons
- C.
Lamina terminalis
- D.
Mammillary body
- E.
Optic chiasm
- 12.Which of the following structures is located immediately inferior to the pulvinar and,in the sagittal plane (MRI or brain sec-tion), forms a distinct elevation immediately adjacent to the crus cerebri?
- A.
Mammillary nuclei
- B.
Medial geniculate nucleus
- C.
Optic tract
- D.
Subthalamic nucleus
- E.
Uncus
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