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• CA3–CA1 long‐term potentiation occurs regardless of respiration and cardiac cycle phases in urethane‐anesthetized rats 

  Nokia, Miriam S.; Waselius, Tomi; Penttonen, Markku (Wiley, 2023)

  Breathing and heartbeat synchronize to each other and to brain function and affect cognition in humans. However, it is not clear how cardiorespiratory rhythms modulate such basic processes as synaptic plasticity thought ...

• Auditory cortical and hippocampal local-field potentials to frequency deviant tones in urethane-anesthetized rats: An unexpected role of the sound frequencies themselves 

  Ruusuvirta, Timo; Lipponen, Arto; Pellinen, Eeva-Kaarina; Penttonen, Markku; Astikainen, Piia (Elsevier BV; International Organization of Psychophysiology, 2015)

  The human brain can automatically detect auditory changes, as indexed by the mismatch negativity of event-related potentials. The mechanisms that underlie this response are poorly understood. We recorded primary auditory ...

• Intrinsic running capacity associates with hippocampal electrophysiology and long-term potentiation in rats 

  Mäkinen, Elina E.; Lensu, Sanna; Wikgren, Jan; Pekkala, Satu; Koch, Lauren G.; Britton, Steven L.; Nokia, Miriam S. (Elsevier, 2024)

  Good aerobic and metabolic fitness associates with better cognitive performance and brain health. Conversely, poor metabolic health predisposes to neurodegenerative diseases. Our previous findings indicate that rats ...

• Deviance detection in sound frequency in simple and complex sounds in urethane-anesthetized rats 

  Yang, Tiantian; Hämäläinen, Jarmo; Lohvansuu, Kaisa; Lipponen, Arto; Penttonen, Markku; Astikainen, Piia (Elsevier, 2021)

  Mismatch negativity (MMN), which is an electrophysiological response demonstrated in humans and animals, reflects memory-based deviance detection in a series of sounds. However, only a few studies on rodents have used ...

• Auditory cortical and hippocampal-system mismatch responses to duration deviants in urethane-anesthetized rats 

  Ruusuvirta, Timo; Lipponen, Arto; Pellinen, Eeva; Penttonen, Markku; Astikainen, Piia (Public Library of Science, 2013-04-05)

  Any change in the invariant aspects of the auditory environment is of potential importance. The human brain preattentively or automatically detects such changes. The mismatch negativity (MMN) of event-related potentials ...