In histological studies, oligodendrocytes can be identified using specific histological stains and antibodies. Techniques such as immunohistochemistry and electron microscopy are commonly employed to study their structure and function. Stains like Luxol Fast Blue are used to visualize myelin sheaths, while antibodies against proteins like Olig2 and myelin basic protein (MBP) help identify oligodendrocytes and their myelin products.