Free Essays on The Life Of A Plain Indian

The life of a plain Indian was one of simplicity and routine. As with most other Native Americans, plain Indians were very resourceful and were â€Å"one with their land.† Plain tribes such as the Sioux and the Cheyenne were dependent on the flourishment of the local wild food and the herds of buffalo. Also these Native Americans were very sheltered; they knew very much about life east of the Mississippi. Once peaceful plain Indians but later turned rebellious due to the white man’s destruction of what these Indians believed was sacred. First some of the major problems Indians had with the settlers were land and the buffalo. Land, settlers claimed whatever land they wanted whenever and no matter whose livelihood it destroyed. This idea of Manifest Destiny was reasoned that â€Å"Native Americans had forfeited their rights to the land because they hadn’t settled down to improve it.† Buffalo, the main source the plain Indian depended on. The plain Indian treated this animal as sacred performing rituals before and after killing and also using every part for some need. But as the white man settled the plains buffalos were say as easy game for a gun from a high, over-looking position. These settlers would kill thousands just for the hide and some misc. parts leaving most to waste. Soon with these mass killings the American buffalo would go from being one of our country’s most abundant animal to endangered specie. Once the plains became populated with many settlers the government took a strong hold against all the Indians, forcing them into barren areas such as the Sand Creek Reserve. Due to the lack of necessities the Cheyenne raided local trails and settlements. In retaliation the U.S. Army attacked surrendered Cheyenne. This night time massacre resulted in 200 sleeping Cheyenne men, women, and children all slain. But not only did they meet their demise their bodies were mutilated. Another clash that came between the ... Free Essays on The Life Of A Plain Indian Free Essays on The Life Of A Plain Indian The life of a plain Indian was one of simplicity and routine. As with most other Native Americans, plain Indians were very resourceful and were â€Å"one with their land.† Plain tribes such as the Sioux and the Cheyenne were dependent on the flourishment of the local wild food and the herds of buffalo. Also these Native Americans were very sheltered; they knew very much about life east of the Mississippi. Once peaceful plain Indians but later turned rebellious due to the white man’s destruction of what these Indians believed was sacred. First some of the major problems Indians had with the settlers were land and the buffalo. Land, settlers claimed whatever land they wanted whenever and no matter whose livelihood it destroyed. This idea of Manifest Destiny was reasoned that â€Å"Native Americans had forfeited their rights to the land because they hadn’t settled down to improve it.† Buffalo, the main source the plain Indian depended on. The plain Indian treated this animal as sacred performing rituals before and after killing and also using every part for some need. But as the white man settled the plains buffalos were say as easy game for a gun from a high, over-looking position. These settlers would kill thousands just for the hide and some misc. parts leaving most to waste. Soon with these mass killings the American buffalo would go from being one of our country’s most abundant animal to endangered specie. Once the plains became populated with many settlers the government took a strong hold against all the Indians, forcing them into barren areas such as the Sand Creek Reserve. Due to the lack of necessities the Cheyenne raided local trails and settlements. In retaliation the U.S. Army attacked surrendered Cheyenne. This night time massacre resulted in 200 sleeping Cheyenne men, women, and children all slain. But not only did they meet their demise their bodies were mutilated. Another clash that came between the ...

Gyri and Sulci of the Brain

Gyri and Sulci of the Brain The brain has a unique appearance that consists of many folds or ridges and indentations. A brain ridge is known as a gyrus, while an indentation or depression is a sulcus or fissure. The cerebral cortex consists of gyri that are typically surrounded by one or more sulci. Gyri and sulci give the brain its wrinkled appearance. The cerebral cortex is the most highly developed area of the brain and is responsible for higher brain functions such as thinking, planning and decision making. Key Takeaways: Brain Gyri and Sulci Gyri and sulci folds and indentations in the brain that are responsible for its wrinkled appearance.Gyri (gyrus singular) are the folds or bumps in the brain and sulci (sulcus singular) are the indentations or grooves in the brain.Folding of the cerebral cortex creates gyri and sulci which separate brain regions, increase the brains surface area, and increase cognitive ability.Gyri and sulci form boundaries between the lobes of the brain and divide the brain into two hemispheres.An example of a sulcus is the interhemispheric or medial longitudinal fissure that separates the left and right brain hemispheres. The corpus callosum is found within this fissure.An example of a gyrus is Brocas gyrus, an area of the brain that is noted in speech production. Gyri and Sulci Function Brain gyri and sulci serve two very important functions. These hills and valleys help to increase the surface area of the cerebral cortex. This allows more neurons to be packed into the cortex and increases the brains ability to process information. Gyri and sulci also form brain divisions by creating boundaries between the lobes of the brain and dividing the brain into two hemispheres. The cerebral cortex is divided into four lobes. The frontal lobes are located in the front-most region of the cerebral cortex. The parietal lobes and temporal lobes are positioned behind the frontal lobes, with the parietal lobes positioned above the temporal lobes. The occipital lobes sit at the posterior region of the cerebral cortex. Each of these brain lobes are responsible for several important functions. The frontal lobes are vital for motor control, thinking, and reasoning. The parietal lobes process sensory information, while the occipital lobes are the main centers for visual processing. The temporal lobes are important for language and speech production, as well as for memory and emotion processing. Brain Sulci or Fissures Below is a listing of several key sulci in the brain. Interhemispheric (Medial Longitudinal Fissure): This is a deep furrow located down the center of the brain that separates the left and right brain hemispheres. The corpus callosum is located within this fissure.Fissure of Sylvius (Lateral Sulcus): This deep grove separates the parietal and temporal lobes.Central Sulcus (Fissure of Rolando): This sulcus separates the parietal and frontal lobes.Collateral Sulcus: This furrow separates the fusiform gyrus and the hippocampal gyrus on the lower surface of the temporal lobes.Parieto-occipital Sulcus: This deep crevice separates the parietal and occipital lobes.Calcarine Sulcus: This grove is located in the occipital lobes and divides the visual cortex. Brain Gyri Listed below are a number of important gyri of the cerebrum. Agular Gyrus: This fold in the parietal lobe is the area of the brain that assists in processing auditory and visual stimuli. It is also involved in language comprehension.Brocas Gyrus (Borcas Area): This area of the brain, located in the left frontal lobe in most individuals, controls motor functions involved with speech production.Cingulate Gyrus: This arch-shaped fold in the brain is located above the corpus callosum. It is a component of the limbic system and processes sensory input concerning emotions and regulates aggressive behavior.Fusiform Gyrus: This bulge located in the temporal and occipital lobes consists of lateral and medial parts. It is thought to play a role in facial and word recognition.Hippocampal Gyrus (Parahippocampal Gyrus): This fold on the inner surface of the temporal lobe borders the hippocampus. The hippocampal gyrus surrounds the hippocampus and plays an important role in memory.Lingual Gyrus: This convolution of the occipital lobe is involved in visual p rocessing. The lingual gyrus is bordered by the calcarine sulcus and collateral sulcus. Anteriorly, the lingual gyrus is continuous with the parahippocampal gyrus and together they form the medial portion of the fusiform gyrus. Gyri and sulci are very important features of the central nervous system. Folding of the cerebral cortex creates these ridges and grooves which serve to separate brain regions and increase cognitive ability.