Abstract :
[en] Dendrites of dopaminergic neurons receive and convey synaptic input, support action potential back-propagation and neurotransmitter release.
Understanding these fundamental functions will shed light on the information transfer in these neurons. Dendritic patch-clamp recordings provide
the possibility to directly examine the electrical properties of dendrites and underlying voltage-gated ion channels. However, these fine structures
are not easily accessible to patch pipettes because of their small diameter. This report describes a step-by-step procedure to collect stable and
reliable recordings from the dendrites of dopaminergic neurons in acute slices. Electrophysiological measurements are combined with post hoc
recovery of cell morphology. Successful experiments rely on improved preparation of slices, solutions and pipettes, adequate adjustment of
the optics and stability of the pipette in contact with the recorded structure. Standard principles of somatic patch-clamp recording are applied to
dendrites but with a gentler approach of the pipette. These versatile techniques can be implemented to address various questions concerning the
excitable properties of dendrites.
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