CSF carries bioactive factors that keep the brain fit and also drain away the brain’s waste products.
An injury or stroke to both the left and right occipital lobes causes blindness, even though the eyes work fine.
Glioblastoma=A bright splotch on the MRI means that it is likely to be a glioblastoma. These high-grade, aggressive tumours send chemical signals to prompt the growth of new blood vessels to nourish them. As a result, they can suck up the contrast agent that is injected into the person’s vein, thereby making them look bright
During sleep: instead of taking in new information, our brain’s subconscious is occupied defragging, deleting and storing the prior day’s doings for long-term retrieval; cleaning out bits and pieces; and presenting us with immersive 3-D virtual stories in which we are the star. By erasing and ‘forgetting’ information that is built up throughout the day that would clutter the synaptic network that defines us.
This targeted forgetting is necessary for efficient learning and deficits in this process may underlie various kinds of intellectual disabilities and mental health problems. The brain literallly flushes out cellular detritus built up during the day.
Pentobarbital drug suppress the electrical spikes in the brain by putting her into como-like state. Eliminating these spikes would bring her brain to its lowest metabolic demand and make it biologically dormant while the swelling in the brain abated.
Hyperventilation during panic attack makes people feel like they don’t have enough oxygen when they do have plenty. Heavy breathing lowers the concentration of carbon dioxide-the gas we exhale. However, we need a certain amount of carbon dioxide circulating in our blood; if the carbon dioxide is too low, the brain responds by squeezing and shrinking the small blood vessels.
Other organs can go hours without blood flow their cells die, but neurons survive only a few minutes without blood.
Hypothalamus= regulates hormones that control blood pressure, body temperature, growth and more.
Brain stem= breathing, sleeping, heart rate, consciousness, and pain sensitivity.Recovery for damage in brainstem is impossible.
Cerebellum= physical movements, coordination and timing, and refines thoughts and emotions
The cerebral cortex= consciousness, language, perception, thought
Pineal gland=: source of melatonin
%60 of the brain is white matter
CSF carries bioactive factors that keep the brain fit and also drain away the brain’s waste products.
Lack of dopamine in the brain causes Parkinson’s patients to struggle with movement (medicine= L-dopa)
The scalp feels pain, but the surface of the brain has no pain receptors.
85 billion glia feed neurons with nutrients and oxygen, insulate them from each other, destroy invading pathogens, remove dead neurons and enhance their communication.
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