Final answer:
The 2nd-order neuron of the hypothalamospinal tract does not arise from the lateral horn of T1. The lateral horn of T1 is associated with the sympathetic division of the autonomic nervous system. The hypothalamospinal tract arises from the hypothalamus in the brain and is involved in the control of skeletal muscles.
Step-by-step explanation:
The 2nd-order neuron of the hypothalamospinal tract does not arise from the lateral horn of T1. The lateral horn of T1 is associated with the sympathetic division of the autonomic nervous system. The hypothalamospinal tract, on the other hand, is involved in the control of skeletal muscles and arises from the hypothalamus in the brain.