Decreased Blood Pressure

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Decreased LOC occurs when the heart can’t overcome the pressure in the brain to deliver blood and oxygen to the cerebral tissues. In a healthy individual, blood, oxygen, and nutrients such as glucose are brought to the brain through both the vertebral arteries and the internal carotid arteries, which branch off from the aorta. The brain requires about 20% of the body’s cardiac output. The internal carotid arteries branch off into the anterior and middle cerebral arteries, which form the anterior circulation and supply the front of the brain. The anterior and middle cerebral arteries also come from the circle of Willis and branch off into other arteries that supply the front of the brain and deeper structures. The lenticulostriate arteries branch off of the middle …show more content…
These transport carriers also take essential amino acids from the blood and move them into the brain cells that don’t synthesize them. Sodium ion transporters and Na, K-ATPase move sodium from the blood into the cells of the brain.
Something has caused damage to the blood vessels that supply blood to the brain. This damage has allowed blood to escape the blood vessel and leak into the subarachnoid space. If the cause is an aneurysm, that aneurysm ruptured. The size of the aneurysm determines the size of the bleed.
The brain is composed of four lobes: the frontal, temporal, parietal, and occipital lobes. The brain also contains the thalamus, hypothalamus, basal ganglia, the limbic system, and the cerebellum.
Higher cognitive function, memory retention, voluntary eye movements, voluntary motor movement, and speech are controlled by the frontal lobe. Speech is regulated in Broca’s area.
Integration of somatic data, visual data, auditory data, past experiences, and Wernicke’s speech area are controlled and located in the temporal lobe. Wernicke’s speech area deals with language

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