Skip to main content
. Author manuscript; available in PMC: 2012 Feb 10.
Published in final edited form as: Neuron. 2011 Feb 10;69(3):453–467. doi: 10.1016/j.neuron.2010.12.032

Figure 3. SMA L1 motor neurons are hyperexcitable.

Figure 3

(A) Antidromically evoked action potentials recorded in a WT and a SMA L1 motor neuron. The superimposed traces shown on an expanded time scale reveal the greater amplitude and rate of rise in the SMA (red) motor neuron. (B) The average amplitude and rate of rise of the antidromic action potential in SMA and WT motor neurons. (C) Membrane responses following current injection in a WT and a SMA motor neuron. (D) Current/voltage relationships for the two neurons shown in C. (E) The average input resistance, rheobase current and spike threshold for WT and SMA motor neurons. * p<0.01, t-test. Arrowheads show the stimulus artifact. Scale bars: A = 20mV, 10ms; superimposed traces = 20mV, 2ms; C = 20mV, 20ms, current: 400pA (WT), 200pA (SMA).