Table 2.
Extracellularly determined responses of ventral pallidal neurons sensitive to subthalamic nucleus stimulation
| Response component2-a | ||||
|---|---|---|---|---|
| Short-latency excitation (n = 43) | Intermediate-latency excitation (n = 24) | Long-latency excitation (n = 13) | Inhibition (n = 27) | |
| STN stimulation threshold current (mA) | 0.5 ± 0.0 | 0.5 ± 0.0 | 0.6 ± 0.1 | 0.5 ± 0.1 |
| Response onset latency (msec) | 5.6 ± 0.1 | 14.1 ± 0.8 | 34.5 ± 4.5 | 10.8 ± 1.6 |
| Response duration (msec) | 18.7 ± 4.6 | 18.3 ± 2.4 | 17.7 ± 4.0 | 22.6 ± 3.0 |
| Response magnitude (number of action potentials) | 80 ± 8 | 107 ± 19 | 50 ± 12 | 20 ± 6 |
Data are presented as mean ± SEM.
F2-a
A total of 78 neurons were evaluated at threshold stimulation current. This included 56 neurons randomly sampled and 22 neurons selected for responding to STN stimulation with an evoked excitatory response. Responses are categorized as either excitatory or inhibitory and further categorized on the basis of onset latency. Neurons often demonstrated complex response profiles with two or more response components so the total number of components (presented as the n in each column) is greater than the total number of neurons tested.