The lobster p1 neuromuscular system is temperature-sensitive.

<p>(A) As temperature (top trace) was decreased the force of muscle contraction (middle trace) increased. The activity of the nerve containing the LP neuron input to the muscle is shown in the bottom trace. (B) and (C) Time expansion from (A) showing muscle force (top trace) and neural input (bottom trace) at 9°C and 15°C. Arrows show that two LP neuron bursts chosen for having essentially identical characteristics induced very different muscle contraction amplitudes at the two temperatures. Inset in (C) is muscle force at an expanded scale to show that even at warm temperatures each motor neuron burst continued to induce (very small) muscle contractions.