The pathways by which sensory information from the peripheral nerves is transmitted to the cerebral cortex. Ascending tracts are also known as somatosensory pathways or systems.
Pain travels through “redundant” pathways, ensuring to inform the subject to Get out of this situation immediately.. 7.1 Pain Pathways. The ascending pathways that mediate pain consist of three different tracts: the neospinothalamic tract, the paleospinothalamic tract and the archispinothalamic tract. The first-order neurons are located in the dorsal root ganglion (DRG) for all three pathways.  tract-a bundle of myelinated nerve fibers following a path through the brain. nerve pathway, nerve tract, pathway. optic radiation, radiatio optica-a nerve pathway from the lateral geniculate body to the visual cortex. commissure-a bundle of nerve fibers passing from one side to the other of the brain or spinal cord. 1. a. An expanse of land or water. b. A specified or limited area of land: developing a 30-acre tract. 2. Anatomy. a. A system of organs and tissues that together perform a specialized function: the alimentary tract. tract. n. 1. an extended area, as of land. 2. (Anatomy) anatomy a system of organs, glands, or other tissues that has a particular function: the digestive tract. 3. (Anatomy) a bundle of nerve fibres having the same function, origin, and termination: the optic tract. 1. a. An expanse of land or water. b. A specified or limited area of land: developing a 30-acre tract. 2. Anatomy. a. A system of organs and tissues that together perform a specialized function: the alimentary tract. The spinal cord is the most important structure between the body and the brain. The spinal cord extends from the foramen magnum where it is continuous with the medulla to the level of the first or second lumbar vertebrae. It is a vital link between the brain and the body, and from the body to the brain. The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter. Two consecutive rows of nerve roots emerge on each of its sides. These nerve roots join distally to form 31 pairs of spinal nerves.  This article is about the ascending tracts – the pathways by which sensory information from the peripheral nerves is transmitted to the cerebral cortex. In some texts, ascending tracts are also known as somatosensory pathways or systems. Functionally, the ascending tracts can be divided into the type of information they transmit; conscious or unconscious: 1  Conscious tracts – Comprised of the dorsal column-medial lemniscal pathway, and the anterolateral system. 2  Unconscious tracts – Comprises of the spinocerebellar tracts. Ascending pathway: A nerve pathway that goes upward from the spinal cord toward the brain carrying sensory information from the body to the brain. In contrast, descending pathways are nerve pathways that go down the spinal cord and allow the brain to control movement of the body below the head.  From Wikipedia, the free encyclopedia. The spinoreticular tract is an ascending pathway in the white matter of the spinal cord, positioned closely to the lateral spinothalamic tract. The tract is from spinal cord—to reticular formation — to thalamus. The spinoreticular tract utilizes four levels of neurons, unlike most ascending tracts which have first-through third-order neurons. The tract begins with first-order neurons, which immediately synapse with second-order neurons in the posterior horn of the spinal column. This article is about the descending tracts of the central nervous system. The descending tracts are the pathways by which motor signals are sent from the brain to lower motor neurones. The lower motor neurones then directly innervate muscles to produce movement. The spinothalamic tract (also known as anterolateral system or the ventrolateral system) is a sensory pathway from the skin 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 adjacent pathways: anterior and lateral. The anterior spinothalamic tract carries information about crude touch. The lateral spinothalamic tract conveys pain and temperature. In the spinal cord, the spinothalamic tract has somatotopic organization.
http://neuroscience.uth.tmc.edu/s2/chapter07.html http://www.thefreedictionary.com/ascending+tract http://www.thefreedictionary.com/ascending+tract http://neuroscience.uth.tmc.edu/s2/chapter03.html http://teachmeanatomy.info/neuro/pathways/ascending-tracts-sensory/ http://www.medicinenet.com/script/main/art.asp?articlekey=11289 https://en.wikipedia.org/wiki/Spinoreticular_tract http://teachmeanatomy.info/neuro/pathways/descending-tracts-motor/ https://en.wikipedia.org/wiki/Spinothalamic_tract
ascending tract definition