Civil Rights
Movements, leaders, victories and the continuing fight for equality.
Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
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Mansa Musa was the ruler of the Mali Empire in West Africa. Details recorded here should be sourced; unknown information is left blank.
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
| Isthmus of cingulate gyrus( Brodmann area 29) | |
|---|---|
Medial surface of left cerebral hemisphere. (Isthmus labeled at left center.) | |
| Details | |
| Identifiers | |
| Latin | isthmus gyri cinguli |
| NeuroNames | 163 |
| NeuroLex ID | birnlex_1541 |
| TA98 | A14.1.09.232 |
| TA2 | 5514 |
| FMA | 62502 |
| Anatomical terms of neuroanatomy | |
The cingulate gyrus commences below the rostrum of the corpus callosum, curves around in front of the genu, extends along the upper surface of the body, and finally turns downward behind the splenium, where it is connected by a narrow isthmus with the parahippocampal gyrus.
This article incorporates text in the public domain from page 825 of the 20th edition of Gray's Anatomy (1918)
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
The cingulate gyrus commences below the rostrum of the corpus callosum, curves around in front of the genu, extends along the upper surface of the body, and finally turns downward behind the splenium, where it is connected by a narrow isthmus with the parahippocampal gyrus.
In anatomy, "isthmus" refers to a constriction between organs. This is a list of anatomical isthmi: Aortic isthmus, section of the aortic arch Cavo-tricuspid isthmus of the right atrium of the heart, a body of fibrous tissue in the lower atrium between the inferior vena cava and the tricuspid valve Isthmus, the ear side of the eustachian tube Isthmus, the narrowed part between the trunk and the splenium of the corpus callosum Isthmus, formation of the shell membrane in birds' oviducts Isthmus lobe, a lobe in the prostate Isthmus of cingulate gyrus Isthmus of fauces, opening at the back of the mouth into the throat Isthmus organizer, a secondary organizer region at the junction of the midbrain and metencephalon Isthmus tubae uterinae, which links the fallopian tube to the uterus Kronig isthmus, a band of resonance representing the apex of the lung Thyroid isthmus, a thin band of tissue connecting some of the lobes that make up the thyroid Uterine isthmus, the inferior-posterior part of the uterus
Brodmann area 29, also known as granular retrolimbic area 29 or granular retrosplenial cortex, is a cytoarchitecturally defined portion of the retrosplenial region of the cerebral cortex. In the human it is a narrow band located in the isthmus of cingulate gyrus. Cytoarchitecturally it is bounded internally by the ectosplenial area 26 and externally by the agranular retrolimbic area 30 (Brodmann-1909). Brodmann has this to say about area 29, amongst his other comments on it: "An unusual regression of layer II together with layer III is found in the granular retrosplenial cortex, illustrated in Figures 38 to 41 for four different animals. Here, in addition to the regression of layers II and III, there is fusion of the original layers V and VI and at the same time an isolated massive increase of the inner granular layer, that is particularly prominent in Figures 38 and 39;..."
Brodmann area 30, also known as agranular retrolimbic area 30, is a subdivision of the cytoarchitecturally defined retrosplenial region of the cerebral cortex. In the human it is located in the isthmus of cingulate gyrus. Cytoarchitecturally it is bounded internally by the granular retrolimbic area 29, dorsally by the ventral posterior cingulate area 23 and ventrolaterally by the ectorhinal area 36 (Brodmann-1909). In primates, Brodmann area 30 demonstrates projections to the mid-dorsolateral prefrontal cortex (Brodmann areas 46 and 9) and the thalamus. Additionally, approximately 20% of cortical inputs to the entorhinal cortex arise from the retrosplenial cortex. Individuals with lesions to retrosplenial cortex, predominantly Brodmann’s area 30, demonstrate dysfunction in their topographical orientation, including defective navigation in novel and familiar environments.
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 →Madam C.J. Walker