Topic: human neocortex

Inhibitory interneurons account for 20-30\% of neurons in the human neocortex (Markram et al. 2004) and separate into distinct cell-types (Gouwens et al. 2020, Lee et al. 2023). However, the functional role of these inhibitory cell-types is not yet well understood, especially not in the intact human neocortical circuit. Here we investigate the input-output transformations afforded by human inhibitory neurons as a function of cell-type compared to their rodent counterparts. To do so, we use multi-objective evolutionary optimization to develop approximately 4860 biophysically realistic and morph

Aging is associated with the slowdown of neuronal processing and cognitive performance in the brain; however, the exact cellular mechanisms behind this deterioration in humans are poorly elucidated. Recordings in human acute brain slices prepared from tissue resected during brain surgery enable the investigation of neuronal changes with age. Although neocortical fast-spiking cells are widely implicated in neuronal network activities underlying cognitive processes, they are vulnerable to neurodegeneration. Herein, we analyzed the electrical properties of 147 fast-spiking interneurons in neocort

Activation of group I metabotropic glutamate receptors (mGluR) in the brain mediates changes in neuronal excitability, synaptic transmission, and network activity of cortical circuits and has been linked to learning-related plasticity, brain state-modulation as well as various human neurological disorders but studies investigating their effect in human brain are scarce and mostly focused on excitatory neurons. We studied the effects of group I mGluR activation on monosynaptic glutamatergic synapses arriving onto interneurons and disynaptic GABAergic synapses using dual whole-cell patch clamp r