Morphological differences between the dendrites of TH-positive, CTB-positive RVLM neurons from sedentary and active rats were not consistent for all types of dendrite. A, The number of primary dendrites was similar between sedentary and active rats, but sedentary rats had more higher-order dendrites relative to active rats. B, Sedentary rats had shorter primary dendrites than active rats, but higher-order dendrites were longer. C, In sedentary rats, 1st to 4th order dendrites had more branches than in active rats. *, p<0.05, individual differences between sedentary and active animals.