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Mouse subthalamic nucleus neurons with local axon collaterals
Author(s) -
GoutyColomer LaurieAnne,
Michel François J,
Baude Agnès,
LopezPauchet Catherine,
Dufour Amandine,
Cossart Rosa,
Hammond Constance
Publication year - 2018
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.24334
Subject(s) - subthalamic nucleus , neuroscience , biology , axon , population , nucleus , glutamatergic , glutamate receptor , parkinson's disease , deep brain stimulation , medicine , biochemistry , demography , receptor , disease , pathology , sociology
The neuronal population of the subthalamic nucleus (STN) has the ability to prolong incoming cortical excitation. This could result from intra‐STN feedback excitation. The combination of inducible genetic fate mapping techniques with in vitro targeted patch‐clamp recordings, allowed identifying a new type of STN neurons that possess a highly collateralized intrinsic axon. The time window of birth dates was found to be narrow (E10.5–E14.5) with very few STN neurons born at E10.5 or E14.5. The fate mapped E11.5–12.5 STN neuronal population included 20% of neurons with profuse axonal branching inside the nucleus and a dendritic arbor that differed from that of STN neurons without local axon collaterals. They had intrinsic electrophysiological properties and in particular, the ability to generate plateau potentials, similar to that of STN neurons without local axon collaterals and more generally to that of classically described STN neurons. This suggests that a subpopulation of STN neurons forms a local glutamatergic network, which together with plateau potentials, allow amplification of hyperdirect cortical inputs and synchronization of the STN neuronal population.