( ( Myelin ( insulates ( nerve cells ) ) ) ( , ( ( the ( same ( way plastic ) ) ) ( ( ( ( ( insulates ( an ( electrical wire ) ) ) , ) and ) ( is ( essential ( for ( ( ( transmitting ( electrical signals ) ) ( through ( the brain ) ) ) ( without interference ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (NNP Myelin)) (VP (VBZ insulates) (NP (NN nerve) (NNS cells)))) (, ,) (NP (DT the) (JJ same) (NN way) (NN plastic)) (VP (VP (VBZ insulates) (NP (DT an) (JJ electrical) (NN wire))) (, ,) (CC and) (VP (VBZ is) (ADJP (JJ essential) (PP (IN for) (S (VP (VBG transmitting) (NP (JJ electrical) (NNS signals)) (PP (IN through) (NP (DT the) (NN brain))) (PP (IN without) (NP (NN interference))))))))) (. .)))
Myelin insulates nerve cells, the same way plastic insulates an electrical wire, and is essential for transmitting electrical signals through the brain without interference.
(ROOT (S (NP (JJ Electrical) (NNS wires)) (VP (VBP are) (ADVP (RB usually)) (VP (VBN covered) (PP (IN with) (NP (NN plastic) (CC or) (NN rubber))) (S (VP (TO to) (VP (VB insulate) (NP (DT the) (JJ electrical) (NN wire))))))) (. .)))
Electrical wires are usually covered with plastic or rubber to insulate the electrical wire.