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In 1968 Shirley Chisholm became the first Black woman elected to the United States Congress. In 1972 she launched a campaign for the Democratic presidential nomination, breaking another political barrier.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
Cuneate means "wedge-shaped", and can apply to:
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
Cuneate means "wedge-shaped", and can apply to: Cuneate leaf, a leaf shape Cuneate nucleus, a part of the brainstem Cuneate fasciculus, a tract from the spinal cord into the brainstem
The dorsal column–medial lemniscus pathway (DCML) (also known as the posterior column-medial lemniscus pathway (PCML) is the major sensory pathway of the central nervous system that conveys sensations of fine touch, vibration, two-point discrimination, and proprioception (body position) from the skin and joints. It transmits this information to the somatosensory cortex of the postcentral gyrus in the parietal lobe of the brain. The pathway receives information from sensory receptors throughout the body, and carries this in the gracile fasciculus and the cuneate fasciculus, tracts that make up the white matter dorsal columns (also known as the posterior funiculi) of the spinal cord. At the level of the medulla oblongata, the fibers of the tracts decussate and are continued in the medial lemniscus, on to the thalamus and relayed from there through the internal capsule and transmitted to the somatosensory cortex. The name dorsal-column medial lemniscus comes from the two structures that carry the sensory information: the dorsal columns of the spinal cord, and the medial lemniscus in the brainstem. There are three groupings of neurons that are involved in the pathway: first-order neurons, second-order neurons, and third-order neurons. The first-order neurons are sensory neurons located in the dorsal root ganglia, that send their afferent fibers through the two dorsal columns. The first-order axons make contact with second-order neurons of the dorsal column nuclei (the gracile nucleus and the cuneate nucleus) in the lower medulla. The second-order neurons send their axons to the thalamus. The third-order neurons are in the ventral posterolateral nucleus in the thalamus and fibres from these ascend to the postcentral gyrus. Sensory information from the upper half of the body is received at the cervical level of the spinal cord and carried in the cuneate tract, and information from the lower body is received at the lumbar level and carried in the gracile tract. The gracile tract is medial to the more lateral cuneate tract. The axons of second-order neurons of the gracile and cuneate nuclei are known as the internal arcuate fibers and when they cross over the midline, at the sensory decussation in the medulla, they form the medial lemniscus which connects with the thalamus; the axons synapse on neurons in the ventral posterolateral nucleus which then send axons to the primary somatosensory cortex in the postcentral gyrus of the parietal lobe. All of the axons in the DCML pathway are rapidly conducting, large, myelinated fibers.
Friedrich Schultze (12 August 1848 – 14 October 1934) was a German neurologist and native of Rathenow, Brandenburg. He is known for being the founder of child neurology. In 1871 he earned his doctorate at Heidelberg, and afterwards spent several years as an assistant to pathologist Nikolaus Friedreich (1825–1882). In 1887 he was invited as a "full professor" to the Imperial University of Dorpat, and shortly afterwards became director of the medical clinic and policlinic at the University of Bonn, where he spent the remainder of his career. Schultze is remembered for his numerous medical publications involving neuroanatomical and neuropathological investigations that he performed. In 1884 he was credited with being the first physician to describe a neurological disorder that later became known as Charcot-Marie-Tooth disease. He also provided an early description of acroparesthesia. In 1891 with Wilhelm Heinrich Erb (1840–1921) and Adolph Strümpell (1853–1925), he founded the journal Deutsche Zeitschrift für Nervenheilkunde. His name is lent to the eponymous "comma tract of Schultze" (interfascicular fasciculus), a compact bundle of posterior root fibers situated near the border between the fasciculus gracilis (tract of Goll) and cuneate fasciculus (tract of Burdach) of the spinal cord.
The accessory cuneate nucleus (also lateral cuneate nucleus, or external cuneate nucleus) is a nucleus situated in the caudal medulla oblongata just lateral to the cuneate nucleus. It relays unconscious proprioceptive sensory information from the upper limb and upper trunk to the cerebellum via the cuneocerebellar fibers. The neurons of the ACN (as well as those of the lateral portion of the cuneate nucleus) are functionally homologous with the posterior thoracic nucleus; the cuneocerebellar fibers are therefore the upper body functional equivalent of the dorsal spinocerebellar tract.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Mae Jemison, aboard Space Shuttle Endeavour in 1992.