Functional properties and cell type specific distribution of I(h) channels in leech neurons.

The hyperpolarisation-activated cation current (I(h)) has been described in many vertebrate and invertebrate species and cell types. In neurons, I(h) is involved in rhythmogenesis, membrane potential stabilisation and many other functions. In this work, we investigate the distribution and functional properties of I(h) in identified leech neurons of intact segmental ganglia.