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Corticospinal And Reciprocal Inhibition Actions On Human Soleus Motoneuron Activity During Standing And Walking, Berthe Hanna-Boutros, Sina Sangari, Louis-Solal Giboin, Mohamed-Mounir El Mendili, Alexandra Lackmy-Vallée, Véronique Marchand-Pauvert, Maria Knikou
Corticospinal And Reciprocal Inhibition Actions On Human Soleus Motoneuron Activity During Standing And Walking, Berthe Hanna-Boutros, Sina Sangari, Louis-Solal Giboin, Mohamed-Mounir El Mendili, Alexandra Lackmy-Vallée, Véronique Marchand-Pauvert, Maria Knikou
Publications and Research
Reciprocal Ia inhibition constitutes a key segmental neuronal pathway for coordination of antagonist muscles. In this study, we investigated the soleus H-reflex and reciprocal inhibition exerted from flexor group Ia afferents on soleus motoneurons during standing and walking in 15 healthy subjects following transcranial magnetic stimulation (TMS). The effects of separate TMS or deep peroneal nerve (DPN) stimulation and the effects of combined (TMS + DPN) stimuli on the soleus H-reflex were assessed during standing and at mid- and late stance phases of walking. Subthreshold TMS induced short-latency facilitation on the soleus H-reflex that was present during standing and at …
A Principle Of Economy Predicts The Functional Architecture Of Grid Cells, Xue-Xin Wei, Jason Prentice, Vijay Balasubramanian
A Principle Of Economy Predicts The Functional Architecture Of Grid Cells, Xue-Xin Wei, Jason Prentice, Vijay Balasubramanian
Publications and Research
Grid cells in the brain respond when an animal occupies a periodic lattice of ‘grid fields’ during navigation. Grids are organized in modules with different periodicity. We propose that the grid system implements a hierarchical code for space that economizes the number of neurons required to encode location with a given resolution across a range equal to the largest period. This theory predicts that (i) grid fields should lie on a triangular lattice, (ii) grid scales should follow a geometric progression, (iii) the ratio between adjacent grid scales should be √e for idealized neurons, and lie between 1.4 and 1.7 …