Fig. 10.

Postnatal development of intrinsic oscillations in dLGN neurons. A–C, Voltage recordings show the three main types of intrinsic oscillatory activity that were distinguished in kitten dLGN neurons. The histogram on theright side of each recording shows the corresponding distribution of inter-LTS frequency: note the presence of two clear peaks in B (see text for further details). Records inC₁ and C₂ were obtained in the same neuron at the upper and lower limits of the voltage region of existence of the δ oscillations, respectively, and show the extent of their frequency change within a neuron. D, Age-related distribution of the intrinsic oscillatory activity. Data for the adult have been taken from experiments performed under similar conditions (Leresche et al., 1991). Note that at P42–P49 the percentage of neurons displaying intermittent δ oscillations or δ oscillations is similar to the one in the adult.