[MORPHOLOGICAL BASES OF REORGANIZATION OF THE RAT CEREBELLAR CORTEX IN SENESCENCE].

Area of Science:

• Neuroscience
• Histology
• Immunochemistry

Context:

• Investigates age-related changes in the cerebellar cortex.
• Compares senescent (36-month-old) Wistar rats to young controls.
• Focuses on the impact of aging on neuronal structure and function.

Purpose:

• To examine histological and immunohistochemical alterations in the senescent cerebellar cortex.
• To identify molecular markers associated with neuronal degeneration.
• To understand functional implications of aging on cerebellar circuitry.

Summary:

• Senescent Wistar rats exhibit Purkinje cell degeneration.
• Loss of calbindin, a calcium-binding protein, correlates with Purkinje cell dysfunction.
• Degeneration affects synaptophysin-positive basket cell networks, impairing inhibitory synapses.
• Alterations in cerebellar glomeruli suggest disrupted information transfer.

Impact:

• Calbindin presence in Purkinje cells is a marker of neuronal functional activity.
• Impaired GABAergic synapses contribute to functional deficits in aging.
• Changes in cerebellar glomeruli indicate altered cerebro-cerebellar communication pathways.