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The spinal cord is elliptical in cross section, being compressed dorsolaterally. Two prominent grooves, or sulci, run along its length. The posterior median sulcus is the groove in the dorsal side, and the anterior median fissure is the groove in the ventral side.
Cross-section through cervical spinal cord. The central canal (also known as spinal foramen or ependymal canal[ 1]) is the cerebrospinal fluid -filled space that runs through the spinal cord. [ 1] The central canal lies below and is connected to the ventricular system of the brain, from which it receives cerebrospinal fluid, and shares the same ...
The intermediolateral nucleus ( IML) is a region of grey matter found in one of the three grey columns of the spinal cord, the lateral grey column. This is Rexed lamina VII. The intermediolateral cell column exists at vertebral levels T1 – L3. [ 1] It mediates the entire sympathetic innervation of the body, but the nucleus resides in the grey ...
The four main divisions of the spinal column, from top to bottom: cervical, thoracic, lumbar, and sacral. The lateral grey column (lateral column, lateral cornu, lateral horn of spinal cord, intermediolateral column) is one of the three grey columns of the spinal cord (which give the shape of a butterfly); the others being the anterior and posterior grey columns.
Pyramidal tracts. The term pyramidal tracts refers to upper motor neurons that originate in the cerebral cortex and terminate in the spinal cord ( corticospinal) or brainstem ( corticobulbar ). Nerves emerge in the cerebral cortex, pass down and may cross sides in the medulla oblongata, and travel as part of the spinal cord until they synapse ...
Anatomical terminology. [ edit on Wikidata] The dorsal root of spinal nerve (or posterior root of spinal nerve or sensory root) [ 1] is one of two "roots" which emerge from the spinal cord. It emerges directly from the spinal cord, and travels to the dorsal root ganglion. Nerve fibres with the ventral root then combine to form a spinal nerve.
The spinothalamic tract is a nerve tract in the anterolateral system in the spinal cord. [ 1] This tract is an ascending sensory pathway to the thalamus. From the ventral posterolateral nucleus in the thalamus, sensory information is relayed upward to the somatosensory cortex of the postcentral gyrus . The spinothalamic tract consists of two ...
The lateral grey column, or the lateral horn of spinal cord, is part of the sympathetic nervous system and receives input from brain stem, organs, and hypothalamus. The lateral column is only present in the thoracic region and upper lumbar segments. The lateral grey column contains preganglionic cell bodies of the autonomic nervous system and ...