( ( In ( its ( disabled state ) ) ) ( , ( ( the thalamus ) ( ( is ( thought ( to ( ( allow ( ( unfiltered throughput ) ( of pain ) ) ) ( on ( into ( ( ( the ( conscious brain ) ) and ) ( the ( emotional centers ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (PRP$ its) (JJ disabled) (NN state))) (, ,) (NP (DT the) (NNS thalamus)) (VP (VBZ is) (VP (VBN thought) (S (VP (TO to) (VP (VB allow) (NP (NP (JJ unfiltered) (NN throughput)) (PP (IN of) (NP (NN pain)))) (PP (IN on) (IN into) (NP (NP (DT the) (JJ conscious) (NN brain)) (CC and) (NP (DT the) (JJ emotional) (NNS centers))))))))) (. .)))
In its disabled state, the thalamus is thought to allow unfiltered throughput  of pain on into the conscious brain and the emotional centers.
(ROOT (S (NP (DT The) (NNS thalamus)) (VP (VBZ helps) (S (VP (TO to) (VP (VP (VB regulate) (NP (NN consciousness))) (, ,) (VP (VB arousal)) (, ,) (CC and) (VP (VB sleep) (NP (NNS states))))))) (. .)))