A (nerve cord) can be hollow.Logical formLearned from9 sentences. A nerve can be in a human body.Logical formLearned from9 sentences. Nerves may undergo an irritation.Logical formLearned from9 sentences. A sheath may cover an optic nerve.Logical formLearned from9 sentences. A (nerve center) may pertain-to an empire.Logical formLearned from9 sentences. Damage can be to optic nerves.Logical formLearned from9 sentences. A (nerve agent) can be volatile.Logical formLearned from9 sentences. (Nerve impulses) can be from a brain.Logical formLearned from9 sentences. Nerves may undergo a degeneration.Logical formLearned from9 sentences. (Nerve terminals) can be in regions of a brain.Logical formLearned from9 sentences. Nerves can be weak.Logical formLearned from9 sentences. Part may pertain-to an optic nerve.Logical formLearned from9 sentences. Nerves may relax.Logical formLearned from9 sentences. Nerves can be in a state.Logical formLearned from9 sentences. A nerve can be open.Logical formLearned from9 sentences.