Fig. 6. Profile of intracellularly stained neuron #2. (A) The impaled neuron with the response properties shown in Fig. 5 was intracellularly labeled with Lucifer Yellow. The axon of neuron #2 labeled with Lucifer Yellow was directly traced to the superficial extensor muscle (Area-1), shown enlarged in Area-2. Note that there are no axonal branches to share with the stretch receptor. (B) The complete profile of another neuron #2 with a deformed -like dendritic structure. Bars, 500µm. N3, third segmental nerve; SEM1, medial superficial extensor muscle; SEM2, lateral superficial extensor muscle; SR, stretch receptor; TG, thoracic ganglion.