Which of the following blood vessels supplies the anatomical region indicated by the blue arrow in the image below?
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Options:
explanation: The image shows an axial view of the brain cut at the level of the diencephalon and the insular lobe, as well as the levels of the third ventricle and the occipital horns of the lateral ventricles. The interhemispheric fissure is in the midline, with the frontal lobes at the top of the image and the splenium of the corpus callosum anterior to the occipital lobes (bottom of the image). The middle cerebral artery originates from the internal carotid artery, and supplies the lateral surface of the frontal, parietal and superior temporal lobes of each hemisphere. However, the blue arrow indicates the medial aspect of the frontal lobe on the left side, whose arterial supply comes from the anterior cerebral artery, a branch of the internal carotid artery.
name: Middle cerebral artery
label: b
answer: no
explanation: The image shows an axial view of the brain cut at the level of the diencephalon and the insular lobe, as well as the levels of the third ventricle and the occipital horns of the lateral ventricles. The interhemispheric fissure is in the midline, with the frontal lobes at the top of the image and the splenium of the corpus callosum anterior to the occipital lobes (bottom of the image). The posterior cerebral artery is a branch of the basilar artery and supplies the occipital, the medial parietal and the medial temporal lobes of the brain. However, the blue arrow indicates the medial aspect of the frontal lobe on the left side, whose arterial supply comes from the anterior cerebral artery, a branch of the internal carotid artery.
name: Posterior cerebral artery
label: c
answer: no
explanation: The image shows an axial view of the brain cut at the level of the diencephalon and the insular lobe, as well as the levels of the third ventricle and the occipital horns of the lateral ventricles. The interhemispheric fissure is in the midline, with the frontal lobes at the top of the image and the splenium of the corpus callosum anterior to the occipital lobes (bottom of the image). The lenticulostriate arteries are small vessels supplying the basal ganglia in the depths of each cerebral hemisphere. Clinically they are important because an occlusion of these vessels can infarct the internal capsule and result in contralateral motor paralysis. However, the blue arrow indicates the medial aspect of the frontal lobe on the left side, whose arterial supply comes from the anterior cerebral artery, a branch of the internal carotid artery.
name: Lenticulostriate arteries
label: e
answer: no
explanation: The image shows an axial view of the brain cut at the level of the diencephalon and the insular lobe, as well as the levels of the third ventricle and the occipital horns of the lateral ventricles. The interhemispheric fissure is in the midline, with the frontal lobes at the top of the image and the splenium of the corpus callosum anterior to the occipital lobes (bottom of the image). The anterior communicating artery is a small vessel connecting the left and right anterior cerebral arteries in the circle of Willis at the base of the brain. This artery does not have branches, so it does not supply any particular brain region. However, the blue arrow indicates the medial aspect of the frontal lobe on the left side, whose arterial supply comes from the anterior cerebral artery, a branch of the internal carotid artery.
name: Anterior communicating artery
label: d
answer: no
explanation: The image shows an axial view of the brain cut at the level of the diencephalon and the insular lobe, as well as the levels of the third ventricle and the occipital horns of the lateral ventricles. The interhemispheric fissure is in the midline, with the frontal lobes at the top of the image and the splenium of the corpus callosum anterior to the occipital lobes (bottom of the image). The blue arrow indicates the medial aspect of the frontal lobe on the left side, whose arterial supply comes from the anterior cerebral artery, a branch of the internal carotid artery.
name: Anterior cerebral artery
label: a
answer: yes

Correct answer: a