Central Nervous System Art-labeling Activity: Figure 12.16a Anterior lobe Arbor vitae Pons Medulla oblongata Cerebellar cortex Posterior lobe Choroid plexus Flocculonodular lobe
The Correct Answer and Explanation is:
The image you’ve provided is from a lab activity on the central nervous system, specifically focusing on a sagittal section of the cerebellum and surrounding brainstem structures. Below are the correct labels that correspond to the parts of the diagram:
Correct Labeling (Top to Bottom, Left to Right):
- Pons
- Anterior lobe
- Arbor vitae
- Cerebellar cortex
- Posterior lobe
- Choroid plexus
- Flocculonodular lobe
- Medulla oblongata
Explanation
The cerebellum is a critical component of the central nervous system responsible for coordinating voluntary motor movements, balance, and posture. The image in question presents a mid-sagittal section, revealing both external and internal features of the cerebellum and portions of the brainstem.
The pons is a part of the brainstem that lies above the medulla oblongata and plays a key role in relaying signals between the cerebrum and cerebellum. Below the pons is the medulla oblongata, responsible for regulating vital functions such as heartbeat and respiration.
The anterior lobe and posterior lobe are two of the three primary subdivisions of the cerebellum, separated by the primary fissure. These lobes process information related to body movement. The flocculonodular lobe, the third subdivision, is involved in balance and eye movement coordination and connects closely with the vestibular system.
Inside the cerebellum, the white matter is arranged in a branching, tree-like pattern known as the arbor vitae (“tree of life”). This structure allows for efficient communication between the cerebellar cortex and other brain regions. Surrounding the arbor vitae is the cerebellar cortex, composed of gray matter, which processes input and regulates motor movements.
The choroid plexus is also visible and plays a crucial role in producing cerebrospinal fluid (CSF), which cushions the brain and removes waste products.
Together, these structures demonstrate how the cerebellum integrates sensory input with motor output to ensure smooth and coordinated bodily movements. Damage to any of these regions can result in motor dysfunction, imbalance, or even life-threatening autonomic issues.
