PREGANGLIONIC AUTONOMIC FIBERS
\pɹɪɡˌaŋɡlɪˈɒnɪk ɔːtənˈɒmɪk fˈa͡ɪbəz], \pɹɪɡˌaŋɡlɪˈɒnɪk ɔːtənˈɒmɪk fˈaɪbəz], \p_ɹ_ɪ_ɡ_ˌa_ŋ_ɡ_l_ɪ__ˈɒ_n_ɪ_k ɔː_t_ə_n_ˈɒ_m_ɪ_k f_ˈaɪ_b_ə_z]\
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Nerve fibers which project from the central nervous system to autonomic ganglia. In the sympathetic division most preganglionic fibers originate with neurons in the intermediolateral column of the spinal cord, exit via ventral roots from upper thoracic through lower lumbar segments, and project to the paravertebral ganglia; there they either terminate in synapses or continue through the splanchnic nerves to the prevertebral ganglia. In the parasympathetic division the fibers originate in neurons of the brain stem and sacral spinal cord. In both divisions the principal transmitter is acetylcholine but peptide cotransmitters may also be released.
By DataStellar Co., Ltd
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hydromorphic
- [Greek] Structurally adapted to an aquatic environment, as organs of water plants.
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