Identify the structure indicated by the arrow in the image below.
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Options:
explanation: The image shows a coronal view of a dissected left hemisphere. The frontal lobe is at the top of the image and the temporal lobe is at the bottom of the image, with the lateral fissure in between on the right side of the image. The third ventricle is a narrow cavity found in the midline of the brain at the level of the diencephalon. It connects the two lateral ventricles with the fourth ventricle through the foramina of Monro and the cerebral aqueduct, respectively. The third ventricle is not visible in this image, as it only represents one hemisphere of the brain. However, the arrow points to the temporal horn of the lateral ventricle which is located deep within the temporal lobe, running antero-inferiorly along the hippocampus and to the tip of the amygdala.
name: Third ventricle
label: c
answer: no
explanation: The image shows a coronal view of a dissected left hemisphere. The frontal lobe is at the top of the image and the temporal lobe is at the bottom of the image, with the lateral fissure in between on the right side of the image. The fourth ventricle is a midline cavity within the brainstem, bordered anteriorly by the pons and the medulla, and posteriorly by the cerebellum. It is not visible in the image, as the specimen does not include the brainstem which would normally be located more postero-inferior to the level of the prosection. However, the arrow points to the temporal horn of the lateral ventricle which is located deep within the temporal lobe, running antero-inferiorly along the hippocampus and to the tip of the amygdala.
name: Fourth ventricle
label: e
answer: no
explanation: The image shows a coronal view of a dissected left hemisphere. The frontal lobe is at the top of the image and the temporal lobe is at the bottom of the image, with the lateral fissure in between on the right side of the image. The frontal horn of the lateral ventricle is found anterior to the body of the lateral ventricle, deep within the frontal lobe. It is located more anterior compared to the level of the coronal section in the image. The ventricular cavity in the superior aspect of the specimen represents the body of the left lateral ventricle. However, the arrow points to the temporal horn of the lateral ventricle which is located deep within the temporal lobe, running antero-inferiorly along the hippocampus and to the tip of the amygdala.
name: Frontal horn of the lateral ventricle
label: d
answer: no
explanation: The image shows a coronal view of a dissected left hemisphere. The frontal lobe is at the top of the image and the temporal lobe is at the bottom of the image, with the lateral fissure in between on the right side of the image. The arrow points to the temporal horn of the lateral ventricle which is located deep within the temporal lobe, running antero-inferiorly along the hippocampus and to the tip of the amygdala.
name: Temporal horn of the lateral ventricle
label: a
answer: yes
explanation: The image shows a coronal view of a dissected left hemisphere. The frontal lobe is at the top of the image and the temporal lobe is at the bottom of the image, with the lateral fissure in between on the right side of the image. The occipital horn is the smallest segment of the lateral ventricle running postero-medially into the occipital lobe. This is not the correct answer because the level of the coronal section is more anterior compared to the occipital lobe. However, the arrow points to the temporal horn of the lateral ventricle which is located deep within the temporal lobe, running antero-inferiorly along the hippocampus and to the tip of the amygdala.
name: Occipital horn of the lateral ventricle
label: b
answer: no

Correct answer: a