Identify the granular layer of the cerebellum.

Identify the granular layer of the cerebellum.

• A. Molecular layer of the cerebrum
• B. Purkinje layer of cerebrum
• C. None of the answers are correct
• D. Granular layer of the cerebellum

Answer: (D)

The granular layer is the innermost layer of the cerebellar cortex. It’s densely packed with small granule cells that receive input from mossy fibers and, via their axons ascending to the molecular layer as parallel fibers, help shape the signals reaching Purkinje cells. This layer sits beneath the Purkinje cell layer and above the white matter. So naming it the granular layer of the cerebellum correctly identifies this deepest cerebellar layer. The molecular layer is the outer cerebellar layer, and the Purkinje layer is the middle one, so the other options don’t describe the granular layer.

The granular layer is the innermost layer of the cerebellar cortex. It’s densely packed with small granule cells that receive input from mossy fibers and, via their axons ascending to the molecular layer as parallel fibers, help shape the signals reaching Purkinje cells. This layer sits beneath the Purkinje cell layer and above the white matter. So naming it the granular layer of the cerebellum correctly identifies this deepest cerebellar layer. The molecular layer is the outer cerebellar layer, and the Purkinje layer is the middle one, so the other options don’t describe the granular layer.