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Brain
The center of our nervous system and daily thoughts, the brain is a complex, magnificent organ. Ask questions about parts of the brain and their functions here.
2,537 Questions
What deficiency is manifested in fingernails?
If you have a healthy blood supply, your nails will show a peachy pink. The fingernails can show most of your health problems.
* Discolored nails: Diabetes, stress, allergies and simple illness can cause your nails to appear discolored.
* A greenish nail color, however, can be a sign of infection, either in the nail bed or in your system.
* Bluish nail beds can be a sign of lung problems. This could be emphysema or even asthma (asthma doesn't usually show up in the nails). It can also be a sign of poor circulation. A simple dark blue line in the nail can be a sign of skin cancer.
* Tiny black streaks can indicate a heart problem.
* Reddish-brown spots can indicate a deficiency of folic acid, protein or Vitamin C. * Yellowing nails are early signals of various internal disorders, such as diabetes, respiratory or liver problems.
* White lines in or across the nail can signal general sickness, fever, liver or heart disease, some kidney disorders or, more likely; a lack of iron or zinc in your diet.
Midbrain
What part of the brain are smells processed?
The lobe that controls sight is the occipital lobe. The lobe that contorls hearing is the temporal lobe, the lobe that deals with pain, pressure, temperature, touch, and part of taste is the parietal lobe. The lobe that controls consciousness and primary body movements is the frontal lobe. The temporal lobe is said to control smell.
What part of the brain controls hunger?
The parasympathetic nervous system is responsible for digestion. The GI tract is innervated by the Gastric nerve, otherwise known as the Vagus nerve.
What are the structural differences between a cow brain and a human brain?
That all depends on what specific organ you are asking about. As for diet, that requires a simple answer: The diet of a human is naturally that of plants and meat or omnivorous, whereas the diet of a cow is that of a herbivorous one.
How do you get a retarded brain?
You were either born with it (due to genetics), or you have suffered some kind of brain injury as a result of trauma or lack of Oxygen. Even people with dementia and Traumatic Brain Injury later in life can resemble someone who's "retarded".
Personally, I prefer the term "mentally disabled".
As of the year 2012, nobody in the scientific community has really been able to answer this question with research. Although the brain itself does not possess sensory innervation, the outer covering of the brain, called the meninges, does. These meninges can sense pain through the meningeal branches of the trigeminal nerve. This is the reason why people can sense pain when they have meningitis and this is probably the reason why people can feel the electrical sensations that most on the internet have described as "brain zaps," "brain shivers," or "battery head."
Brain zaps are usually associated with taking or withdrawing from certain anti-depressants, such as SSRIs, but they can also be caused by taking or withdrawing from other drugs, such as benzodiazapines. Some may go as far as even claiming that they can have psychogenic origins, such as with anxiety or panic attacks.
It appears to be a form of post-acute withdrawal syndrome and some might argue that it falls under the purview of SSRI discontinuation syndrome. Whatever it is, one thing is certain: it is extremely uncomfortable, it is extremely irritating, and it must be scientifically investigated.
Theoretically, these symptoms could last anywhere from months, years, to a lifetime. These symptoms could be permanent, there is little known about how to best treat them, and it is not known whether or not these have any unforeseen long-term health consequences, such as predisposing an individual to early dementia. Nevertheless, anecdotal evidence exists on the internet regarding the use of GABA agonists and NMDA antagonists to treat this disease, such as acaprosate, memantine, magnesium, ketamine, dextromethorphan, and phencyclidine.
Genetics, GABA receptor downregulation, and NMDA upregulation must play a large role in the pathogenesis of these symptoms. It seems to be a phenomenon of cerebral neuroexcitability sensed via the meningeal branches of the trigeminal nerve.
It is entirely possible that coconsumption of GABA agonists while taking SSRIs may precipitate this symptom in the genetically susceptible. For example, studies have shown that the chronic administration of GABA agonists can cause hyperexcitability (Begleiter 1977) and binge drinking and depression are associated with serontonin receptor mutations (Herman et al 2003). Many people take benzodiazapines and/or drink alcohol while on SSRIs, so it is possible that they are causing permanent downregulation of the GABA receptors allowing for a hyperexcitable cerebral cortex--i.e. "battery head."
What seems to be the most disconcerting about this symptom, however, is the fact that Alzheimer's disease is associated with a hyperexcitable cerebral cortical cortex as well. Thus, in will interesting to see how many legal complaints will be filed against pharmaceutical companies if it turns out that there is an association between taking SSRIs and dementia in the near future.
Begleiter, H., & Porjesz, B. (1977). Persistence of brain hyperexcitability following chronic alcohol exposure in rats. Advances in experimental medicine and biology, 85B, 209-222.
Herman AI et.al. (2003). Serotonin Transporter Promoter Polymorphism and Differences in Alcohol Consumption Behavior in a College Student Population. Alcohol and Alcoholism 38: 446-449.
Glutamate-mediated excitotoxicity and neurodegeneration in Alzheimer's disease.
Matthew R. Hynd, Heather L. Scott, Peter R. Dodd
Neurochem Int. 2004 October; 45(5): 583-595. doi: 10.1016/j.neuint.2004.03.007
The brain controls body temperature, water balance, and sleep.
Can adderall increase oxygen to the brain?
it releases chemicals that your brain has stored in order to increase attention span and efficiency of your thought processes
At birth it was only about a quarter of its eventual adult size. But by age 2, it has reached three-fourths of adult size! And by 5, the brain will be very close to adult size and volume.
The meninges and cerebrospinal fluid separate the brain from the skull and provide protection and cushion for the brain. The meninges are composed of three layers which surround not only the brain but the entire central nervous system. From the topmost layer closest to the skull to the bottommost layer closest to the brain, the meninges consist of the dura mater, arachnoid and pia matter. The cerebrospinal fluid fills the region between the arachnoid and pia mater and within the skull the brain, in essence, floats within this fluid.
What are the disadvantages of brain fingerprinting testing?
It is 100% accurate but it invades privacy...
What part of the brain does happiness come from?
When you are happy the brain releases chemical such as serotonin.
The activity of the hypothalamus most directly influences?
The hypothalamus directly influences the nervous system and the endocrine system. The hypothalamus uses the pituitary gland to link those 2 systems together.
nerves in your body transmit the info to your brain but many other systems are involved in the process. But that's the main one.
A person whose brain suffers from a dysregulation of the serotonin system might suffer from?
epilepsy
Yes.
Yes they do have a brain everything that is living has a brain.
mi_ch_ae_la_7 says:
Actually that's not completely true... Trees for instance do not have brains, yet they are living. I think the question is relevant to an actual brain in the anatomy, not a metaphorical brain of a living thing. Another living thing that does not have a brain is fungi, it's still living, yet has no brain. An amoeba? Also does not have brain. Cells do not have brains. I think I've proven my point. Thank you.
