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Human Brain Growth
Author : Dayvis Ocampo
Submitted : 2011-09-18 Word Count : 870 Popularity: Not Rated
Tags: Brain, Human brain, Neural, Mind, Tumor, Growth, Cancer, Lump, Swelling
The brain and spinal column structure the central nervous system (CNS), where all vital functions, including thought, speech, and strength of the body are controlled. Whenever a tumor occurs within the CNS, it is very problematic because of possible effect on somebody's thought processes or movements.
Primary brain tumors (gliomas) start inside the brain and affect the central nervous system (CNS). They might be noncancerous or cancerous. Inferior brain tumors, which are 10 times more common, are cancers that originated elsewhere in our bodies and have absolutely metastasized (spread) for the brain. Secondary tumors are about 3 times more common than primary tumors from the brain. The most common form of brain cancer is called a primary brain tumour. A primary brain tumour is usually a tumour which starts inside brain, in lieu of a tumour which has spread from another a part of our bodies (commonly called metastases). Primary brain tumours are the 10th most common reason for cancer death in NZ. The bulk of primary brain tumours are called high-grade astrocytomas, of which the bulk are glioblastoma multiforme (GBM). There are approximately 100-120 patients diagnosed with GBM in NZ each year.
A brain tumor begins when normal cells from your brain change and grow uncontrollably, forming a mass. A tumor may very well be benign (noncancerous) or malignant (cancerous). Generally, primary CNS tumors don't spread outside through the CNS. Malignant brain tumors are further classified getting a grade: low, intermediate, or high. More information are available in Staging. This section describes primary brain tumors, which are tumors that begin inside the brain. Secondary brain tumors (also called brain metastases) are common than primary tumors. A secondary brain tumor is usually a cancerous tumor that started in another a part of our bodies (such as the breast, lung, or colon) after which it spread near the brain. Learn more about cancer that started elsewhere in one's body and spread for the brain by reading that specific cancer type.
Anatomy from the brain
The brain is made from four main parts: the cerebrum, the cerebellum, the brain stem, together with the meninges. The cerebrum. This can be the largest part of the brain. It contains two cerebral hemispheres and is divided into four lobes where specific functions occur:
Middle Frontal
The frontal lobe controls reasoning, emotions, problem-solving, expressive speech and movement.The frontal lobe controls reasoning, emotions, problem-solving, expressive speech and movement.
The frontal lobe is an area from the brain of humans and other mammals, located within the front of each cerebral hemisphere and positioned anterior to (before) the parietal lobe and superior and anterior towards the temporal lobes. It's separated from the parietal lobe by a strip of cortical tissue called the post-central gyrus, and from the temporal lobe by a deep fold called the lateral (Sylvian) sulcus. The post-central gyrus, forming the posterior border from your frontal lobe, contains the first motor cortex, which controls voluntary movements of specific body parts.
Parietal lobe
The parietal lobe contain the primary sensory cortex which controls sensation (touch, pressure. Behind the first sensory cortex is a huge association area that controls fine sensation (judgment of texture, weight, size, shape). There are Parietal Lobes for the left and right sides
The parietal lobes may be divided into two functional regions. One involves sensation and perception and the other is concerned with integrating sensory input, primarily while using visual system. The 1st function integrates sensory information to form an individual perception (cognition).
Damage to the right parietal lobe can lead to neglecting part of our bodies or space (contralateral neglect), which often impair many self-care skills like dressing and washing. Right side damage can also cause difficulty in making things (constructional apraxia), denial of deficits (anosagnosia) and drawing ability.
Temporal Lobe
The temporal lobe controls memory, the special senses, intended forinstance hearing, and the thought to know spoken or written words.
The top (superior or dorsal) a part of the temporal lobe includes an area (within the Sylvian fissure) where auditory signals through the cochlea (relayed via several subcortical nuclei) first reach the cerebral cortex. This a part of the cortex (primary auditory cortex) is involved in hearing. Adjacent areas about the superior, posterior and lateral areas of the temporal lobe are involved in high-level auditory processing. In humans this includes speech, the left temporal lobe specifically appears being specialized.
Occipital
The occipital lobe controls vision. The occipital lobe will be the visual processing center about the mammalian brain containing many anatomical region when using the visual cortex. The primary visual cortex is Brodmann area 17, commonly called V1 (visual one). Human V1 is found within the medial side with the occipital lobe inside calcarine sulcus; the whole extent of V1 often continues onto the posterior pole from the occipital lobe. V1 is often also called striate cortex because possibly identified by a tremendous stripe of myelin, the Stria of Gennari.
The cerebellum. The cerebellum is located in the rear an integral part of the brain below the cerebrum. It is critical to coordination and balance. The brain stem. That's the portion while using brain that connects into the spinal cord, controls involuntary functions essential forever, as an example the beating of the heart and breathing. Moreover, messages for every one of the functions controlled from the cerebrum and cerebellum travel by brain stem to the connections inside body.
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