This study investigates the electrophysiological properties of Purkinje cell dendrites in mammalian cerebellar slices. Intradendritic recordings show that white matter stimulation produces large synaptic responses via the climbing fibre afferent, but antidromic potentials do not actively invade the dendritic tree. Climbing fibre responses can be reversed, similar to the somatic level, but show less biphasicity. The input resistance of these dendrites ranges from 15 to 30 MΩ, with non-linear properties similar to the somatic level, though less anomalous rectification is observed. Repetitive firing elicited by outward DC current shows that fast somatic potentials do not invade the dendrite, but dendritic spike bursts are prominent. Two types of voltage-dependent Ca responses are observed: a plateau-like depolarization accompanied by conductance change and large dendritic action potentials. These responses are TTX-resistant but blocked by Cd, Co, Mn, or D600. Blocking Ca conductance reveals plateau potentials near the soma, indicating a somatic membrane association. Spontaneous firing in Purkinje cell dendrites is similar to the soma, with larger burst amplitudes, and is generated at multiple sites. Six ionic conductances are involved in Purkinje cell electroresponsiveness: two Na conductances, a spike- and plateau-generating Ca conductance, and voltage- and Ca-dependent K currents. The role of these conductances in Purkinje cell integration is discussed. The study highlights the active electroresponsiveness of dendrites, with Ca currents playing a key role in generating dendritic spikes and bursts. Dendritic spike bursts are Ca-dependent, with multiple sites of origin, and are followed by prolonged K conductance changes. Sodium conductances are also present, but their role is less prominent in dendritic regions. Spontaneous firing is Ca-dependent and occurs in the dendritic tree. The study provides insights into the integration properties of Purkinje cells, emphasizing the importance of Ca and K conductances in dendritic function.This study investigates the electrophysiological properties of Purkinje cell dendrites in mammalian cerebellar slices. Intradendritic recordings show that white matter stimulation produces large synaptic responses via the climbing fibre afferent, but antidromic potentials do not actively invade the dendritic tree. Climbing fibre responses can be reversed, similar to the somatic level, but show less biphasicity. The input resistance of these dendrites ranges from 15 to 30 MΩ, with non-linear properties similar to the somatic level, though less anomalous rectification is observed. Repetitive firing elicited by outward DC current shows that fast somatic potentials do not invade the dendrite, but dendritic spike bursts are prominent. Two types of voltage-dependent Ca responses are observed: a plateau-like depolarization accompanied by conductance change and large dendritic action potentials. These responses are TTX-resistant but blocked by Cd, Co, Mn, or D600. Blocking Ca conductance reveals plateau potentials near the soma, indicating a somatic membrane association. Spontaneous firing in Purkinje cell dendrites is similar to the soma, with larger burst amplitudes, and is generated at multiple sites. Six ionic conductances are involved in Purkinje cell electroresponsiveness: two Na conductances, a spike- and plateau-generating Ca conductance, and voltage- and Ca-dependent K currents. The role of these conductances in Purkinje cell integration is discussed. The study highlights the active electroresponsiveness of dendrites, with Ca currents playing a key role in generating dendritic spikes and bursts. Dendritic spike bursts are Ca-dependent, with multiple sites of origin, and are followed by prolonged K conductance changes. Sodium conductances are also present, but their role is less prominent in dendritic regions. Spontaneous firing is Ca-dependent and occurs in the dendritic tree. The study provides insights into the integration properties of Purkinje cells, emphasizing the importance of Ca and K conductances in dendritic function.