Question

question
which of the ascending tracts have no third - order neurons?
answer
lateral spinothalamic tracts
anterior and posterior spinocerebellar tracts
fasciculus cuneatus
anterior spinothalamic tracts
fasciculus gracilis
i dont know yet

Explanation:

The anterior and posterior spinocerebellar tracts are part of the sensory pathways. They are unique among the ascending tracts in that they do not have third - order neurons. These tracts carry proprioceptive information (information about body position and movement) from the spinal cord to the cerebellum. The first - order neurons are in the dorsal root ganglia. The second - order neurons are in the spinal cord (e.g., Clarke's nucleus for the posterior spinocerebellar tract). The information then goes directly to the cerebellum without a third - order neuron relay in the thalamus (unlike other sensory pathways like the spinothalamic tracts which have third - order neurons in the thalamus).

Answer:

anterior and posterior spinocerebellar tracts