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vermis
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Diagram of a human brain showing a median sagittal section, highlighting the fourth ventricle and cerebellum in the hindbrain, with labeled anatomical structures including the pons, medulla oblongata, and central canal of the spinal cord.
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vermis

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Diagram of a human brain showing a median sagittal section, highlighting the fourth ventricle and cerebellum in the hindbrain, with labeled anatomical structures including the pons, medulla oblongata, and central canal of the spinal cord.
Structures of the human brain Sagittal section of the human brain, showing structures of the cerebellum, brainstem, and cerebral ventricles.

The vermis is the constricted, median lobe of the cerebellum that connects its two lateral hemispheres. This part of the brain is crucial for coordinating sensory input with muscular responses, helping to maintain balance and posture, and producing smooth, voluntary movements. The cerebellum integrates signals from the inner ear and muscles to make fine adjustments in muscle contractions. It is divided into three layers: the synaptic layer, the Purkinje layer, and the receptive layer. Damage to the cerebellum, including the vermis, can lead to neuromuscular disturbances like ataxia, tremors, and difficulty with coordination.12

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