TSitologiya i Genetika 2025, vol. 59, no. 2, 76-90
Cytology and Genetics 2025, vol. 59, no. 2, 206–218, doi: https://www.doi.org/10.3103/S0095452725020069

Volodymyr Betz’s cytoarchitectonic observations, contextual to the modern concept of the brain modular organization

Medvediev V.V., Cherkasov V.G., Vaslovych V.V., Tsymbaliuk V.I.

  1. Bogomolets National Medical University, 13, Tarasa Shevchenka Blv, Kyiv, 01601, Ukraine
  2. SI «Romodanov Neurosurgery Institute, National Academy of Medical Sciences of Ukraine», 32, Platona Mayborody Str., Kyiv, 04050, Ukraine

SUMMARY. Modern neurobiology is based on the neuron doctrine, recognizing the main substrate of brain function as a network of neurons organized into numerous spatial and/or functional clusters – modules. The best-known illustration of this structural principle is Mountcastle’s concept of the columnar organization of the cortex, the emergence of which is associated with the idea of the vertical cortical cylinder by Lorente de No and a number of complementary cytoarchitectonic, electrophysiological, and neuroontogenetic data. In the proposed article, we present important cytoarchitectonic Betz’s observa-tions, which, from the perspective of modernity, il-lustrate the modular principle of brain organization. In particular, we demonstrate that Betz provided the first description of the «bundling» of cortical pyramidal neurons apical dendrites – one of the key morphological features of the brain modularity. We also demonstrate that Betz first described the entorhinal islands-another widespread example of cortex modular organization. Finally, we present Betz’s pioneering evidence regarding the clustered arrangement of giant pyramidal neurons in the primary motor cortex. In general, the list of Betz’s observations, consistent with the idea of a modular brain organization, includes a description of three cytoarchitectonic phenomena of the human cerebral cortex and the macroscopic counterpart of one of them – the entorhinal tuberosity.

Keywords: neurobiology, neuron doctrine, modular organization of the brain, cortical column, entorhinal islands, Betz cells, Volodymyr Betz

TSitologiya i Genetika
2025, vol. 59, no. 2, 76-90

Current Issue
Cytology and Genetics
2025, vol. 59, no. 2, 206–218,
doi: 10.3103/S0095452725020069

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