If the tract name ends with _____, the tract delivers info to the _____ cord which means it is motor. Key Terms. somatosensory tract: The system that reacts to diverse stimuli using thermoreceptors, nociceptors, mechanoreceptors, and chemoreceptors.The transmission of information from the receptors passes via sensory nerves … Generally speaking, the sensory neurons travel up the spinal cord to transmit action impulses to the brain, thalamus, midbrain, or whatever its terminal point need be. spinothalamic tract: A sensory pathway originating in the spinal cord.It transmits information to the thalamus about pain, temperature, itch, and crude touch. The spinal cord is part of the central nervous system and coordinates motor, sensory, and reflex signals. Anatomically, the spinal cord is located within the spinal canal and extends from the bottom of the medulla (at the first cervical vertebra C1) to the conus medullaris (between L1 and L2). 3. The axons of these neurons form sensory fibers that enter the cord via the dorsal root of spinal nerve. UMNs originate in the motor region of the cerebral cortex or the brain stem and carry motor information down to the LMNs Brown-Séquard syndrome refers to a hemisection (one sided lesion) of the spinal cord. Anterior or the ventral horn mainly consists of motor neurons whose activity maybe influenced by the various inputs either from the descending tracts, interneurons or the afferent sensory neurons forming the spinal … LMNs are located in either the ventral horn of the spinal cord or the cranial nerve nuclei of the brainstem with motor function. Summary. Tracts descending to the spinal cord are involved with voluntary motor function, muscle tone, reflexes and equilibrium, visceral innervation, and modulation of ascending sensory signals. I. The tracts are responsible for carrying sensory and motor stimuli to … Sensory fibers enter the cord via the dorsal root, while motor fibers exit via the ventral root. Spinal Cord Tracts. Descending spinal tracts. The spinal cord has numerous groups of nerve fibers going towards and coming from the brain. These columns are sometimes called funiculi (or funiculus when singular) and are made up of axons that are traveling up (ascending) or down (descending) the spinal cord. The white matter of the spinal cord is divided into the paired posterior (dorsal), lateral, and anterior (ventral) columns. The largest, the corticospinal tract, originates in broad regions of the cerebral cortex. spinal, spinal Neurons in the sensory tracts are arranged according to ______ anatomical principles. The lateral spinothalamic tract (or lateral spinothalamic fasciculus), which is a part of the anterolateral system, is a bundle of afferent nerve fibers ascending through the white matter of the spinal cord, carrying sensory information to the brain.It carries pain, crude touch and temperature sensory information (protopathic sensation) to the thalamus. They consist of a chain of three neurons: First, second, and third-order neurons. Ascending tracts represent functional pathways that convey sensory information from the periphery to higher levels. Lamina X is the small gray matter area around the central canal of the spinal cord. They innervate muscles and are part of the PNS. Injury to the anterolateral system will produce an impairment of pain and temperature sensation. Tracts of the Spinal Cord A. Ascending Tracts 1. A sensory pathway typically involves 3 neurons: – First-order neurons detect stimuli and transmit signals to the spinal cord. 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