Anatomy of the Brain - Cerebellum

The Cerebellum
This is a stylized model of a human brain highlighting the cerebellum. Credit: Science Picture Co/Subjects/Getty Images

Cerebellum

In Latin, the word cerebellum means little brain. The cerebellum is the area of the hindbrain that controls movement coordination, balance, equilibrium and muscle tone. Like the cerebral cortex, the cerebellum is comprised of white matter and a thin, outer layer of densely folded gray matter. The folded outer layer of the cerebellum (cerebellar cortex) has smaller and more compact folds than those of the cerebral cortex.

The cerebellum contains hundreds of millions of neurons for processing data. It relays information between body muscles and areas of the cerebral cortex that are involved in motor control.

Cerebellum Lobes

The cerebellum can be subdivided into three lobes that coordinate information received from the spinal cord and from different areas of the brain. The anterior lobe receives input primarily from the spinal cord. The posterior lobe receives input primarily from the brainstem and cerebral cortex. The flocculonodular lobe receives input from the cranial nuclei of the vestibular nerve. The vestibular nerve is a component of the vestibulocochlear cranial nerve.

Cerebellum Function

The cerebellum is involved in several functions. The cerebellum processes information from the brain and peripheral nervous system for balance and body control. Activities such as walking, hitting a ball, and playing a video game all involve the cerebellum.

The cerebellum helps us to have fine motor control, while inhibiting involuntary movement.

  • Fine Movement Coordination
  • Balance and Equilibrium
  • Muscle Tone
  • Sense of Body Position

Cerebellum Location

Directionally, the cerebellum is situated at the base of the skull, above the brainstem and beneath the occipital lobes of the cerebral cortex.

Cerebellum Damage

Damage to the cerebellum may result in difficulty with motor control. Individuals may have problems maintaining balance, tremors, lack of muscle tone, speech difficulties, lack of control over eye movement, difficulty in standing upright, and an inability to perform accurate movements.

Divisions of the Brain:

The cerebellum is included in the division of the hindbrain known as the metencephalon. The metencephalon also includes the pons. Sagittally, the pons is anterior to the cerebellum and relays sensory information between the cerebrum and cerebellum.