Identify the cerebellar structure indicated by the blue arrow in the following image:
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Options:
explanation: The image shows an anterior view of the brainstem (pons and medulla oblongata) in the centre of the image. The cerebellar hemispheres are seen on either side of the brainstem. The cerebellar tonsils are rounded, inferiorly located lobular extensions on the posterior part of each cerebellar hemisphere, involved in regulating balance and motor coordination. However, the blue arrow indicates the flocculonodular lobe, whose functional equivalent is the vestibulocerebellum, which is involved in controlling balance. The flocculonodular lobe is found inferior to the horizontal fissure, which travels around the cerebellum along its lateral and posterior surfaces, and superior to the posterolateral fissure, which separates it from the posterior lobe of the cerebellum.
name: Cerebellar tonsil
label: e
answer: no
explanation: The image shows an anterior view of the brainstem (pons and medulla oblongata) in the centre of the image. The cerebellar hemispheres are seen on either side of the brainstem. The anterior lobe of the cerebellum is formed by the anterior third of each cerebellar hemisphere and is found superior to the structure indicated by the arrow. However, the blue arrow indicates the flocculonodular lobe, whose functional equivalent is the vestibulocerebellum, which is involved in controlling balance. The flocculonodular lobe is found inferior to the horizontal fissure, which travels around the cerebellum along its lateral and posterior surfaces, and superior to the posterolateral fissure, which separates it from the posterior lobe of the cerebellum.
name: Anterior lobe
label: b
answer: no
explanation: The image shows an anterior view of the brainstem (pons and medulla oblongata) in the centre of the image. The cerebellar hemispheres are seen on either side of the brainstem. The posterior lobe is the largest cerebellar lobe, found posterior and lateral to the horizontal fissure and inferior to the posterolateral fissure. However, the blue arrow indicates the flocculonodular lobe, whose functional equivalent is the vestibulocerebellum, which is involved in controlling balance. The flocculonodular lobe is found inferior to the horizontal fissure, which travels around the cerebellum along its lateral and posterior surfaces, and superior to the posterolateral fissure, which separates it from the posterior lobe of the cerebellum.
name: Posterior lobe
label: c
answer: no
explanation: The image shows an anterior view of the brainstem (pons and medulla oblongata) in the centre of the image. The cerebellar hemispheres are seen on either side of the brainstem. The blue arrow indicates the flocculonodular lobe, whose functional equivalent is the vestibulocerebellum, which is involved in controlling balance. The flocculonodular lobe is found inferior to the horizontal fissure, which travels around the cerebellum along its lateral and posterior surfaces, and superior to the posterolateral fissure, which separates it from the posterior lobe of the cerebellum.
name: Flocculonodular lobe
label: a
answer: yes
explanation: The image shows an anterior view of the brainstem (pons and medulla oblongata) in the centre of the image. The cerebellar hemispheres are seen on either side of the brainstem. The vermis is the narrow, midline structure of the cerebellum that connects the two cerebellar hemispheres and plays a critical role in coordinating trunk and posture-related movements. It is located in the midline, on the posterior surface of the cerebellum, and, thus, it is not immediately visible in the image. However, the blue arrow indicates the flocculonodular lobe, whose functional equivalent is the vestibulocerebellum, which is involved in controlling balance. The flocculonodular lobe is found inferior to the horizontal fissure, which travels around the cerebellum along its lateral and posterior surfaces, and superior to the posterolateral fissure, which separates it from the posterior lobe of the cerebellum.
name: Vermis
label: d
answer: no

Correct answer: a