| Lateral horn | |
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| A spinal nerve with its anterior and posterior roots. (Lateral column labeled at top. ) | |
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| Transverse section of the medulla spinalis in the mid-thoracic region. (Lateral column labeled at center right. ) | |
| Latin | cornu laterale medullae spinalis |
| Gray's | subject #185 753 |
| Dorlands/Elsevier | c_55/12259818 |
In the thoracic region, the postero-lateral part of the anterior column projects lateralward as a triangular field, which is named the lateral column (lateral cornu, lateral horn). Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. This is a list of the subjects in Gray's Anatomy: IX Neurology Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group The thorax is a division of an Animal 's body that lies between the head and the Abdomen. The anterior horn of the Spinal cord (or anterior cornu, or anterior column, or ventral horn) is the ventral (front Grey matter
Nerve Cells in the Lateral Column
These form a column (the intermedioloateral cell column) which is best marked where the lateral gray column is differentiated, viz. , in the thoracic region; but it can be traced throughout the entire length of the medulla spinalis in the form of groups of small cells which are situated in the anterior part of the formatio reticularis. The spinal cord is a long thin tubular bundle of Nerves that is an extension of the Central nervous system from the brain and is enclosed in and protected The reticular formation is a part of the Brain that is involved in actions such as awaking/ sleeping cycle, and lying down The intermediolateral cell column exists at vertebral levels T1 - L2 and mediates the entire sympathetic innervation of the body. The intermediolateral nucleus is a region of Gray matter found in Rexed lamina VII of the Spinal column. Preganglionic, myelinated GVA fibers from viscera course through prevertebral and paravertebral (sympathetic) ganglia, white rami and dorsal roots to synapse with cells of the intermediolateral cell column. Sympathetic ganglia are the ganglia of the Sympathetic nervous system. These cells then give rise to preganglionic GVE fibers which will pass through ventral spinal roots, white rami, and into paravertebral ganglia where some will synapse, thus sending unmyelinated, postganglionic fibers through gray rami and into peripheral nerves. Those fibers that do not synapse in the paravertebral ganglia will eventually synapse at prevertebral ganglia near target viscera. Postganglionic neurons in the prevertebral ganglia send postganglionic fibers to target tissues.
In the upper part of the cervical region and lower part of the medulla oblongata as well as in the third and fourth sacral segments this column is again differentiated. The medulla oblongata is the lower portion of the Brainstem. It deals with autonomic functions such as breathing and blood pressure
In the medulla it is known as the lateral nucleus.
The cells of this column are fusiform or star-shaped, and of a medium size: the axons of some of them pass into the anterior nerve roots, by which they are carried to the sympathetic nerves: they constitute the white rami and are sympathetic or visceral efferent fibers; they are also known as preganglionic fibers of the sympathetic system; the axons of others pass into the anterior and lateral funiculi, where they become longitudinal. In Anatomy and Neurology, the ventral root (or anterior root) is the efferent motor root of a Spinal nerve. The Sympathetic Nervous System ( SNS) is a branch of the Autonomic nervous system along with the Enteric nervous system and Parasympathetic nervous The thoracic and the first and second Lumbar nerves each contribute a branch white ramus communicans to the adjoining Sympathetic ganglion. The general visceral efferent fibers ( GVE or sympathetic efferent fibers) probably arise from cells in the Lateral column or the base of the anterior column In the Autonomic nervous system, fibers from the CNS to the ganglion are known as preganglionic fibers.
This article was originally based on an entry from a public domain edition of Gray's Anatomy. The public domain is a range of abstract materials &ndash commonly referred to as Intellectual property &ndash which are not owned or controlled by anyone Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened is an English-language Human anatomy Textbook As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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