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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
THE NERVOUS SYSTEM
The Central Nervous System-the brain and spinal cord
1. Cerebrum-memory, thinking, learning, controls movement, senses report info here.
2. Cerebellum- 2nd largest, controls balance and coordination
3. Brain stem- controls breathing, digestion, heart rate, and blood pressure/connects brain to spinal cord
The spinal cord connects various organs of human body to the brain
Sensory neurons take signals from senses and brings messages to the Central Nervous System
Motor neurons carries out brains instructions (pull away from pain)
Interneurons takes info from sensory neuron (pain) sends it to brain
The Eye
The lens bends and focuses light rays
The retina is the screen of the eye, light is changed to electricity
The iris controls amount of light entering the eye
The optic nerve carries electrical impulses to the brain
The pupil light enters the eye through this hole
The cornea thin, transparent protective membrane
The choroid contains blood vessels that nourish the eye
The aqueous humor watery fluid in front of the eye
The vitreous humor jelly like fluid, keeps shape of back of eye
The sclera opaque, tough protective membrane
The Human Ear Table
Hammer amplifies sound first
Anvil amplifies sound second
Semi-circular canals controls sense of balance
Auditory nerve carries electrical impulses to the brain
Cochlea changes sound waves into electricity
Stirrup amplifies sound third and last
Ear drum vibrates with incoming sound waves
Eustachian Tube equalizes air pressure
Auditory canal passageways for vibrations
Pinna catches and funnels vibrations
I hope this helped. Each section has something to do with the brain so take some time to read it all. :)
Edit: AMAZING answer - nicely COPIED & PASTED from a web-site !
What part of the hypothalamus would have to be damaged for one to be anorexic?
The hypothalamus does not have great enough of an influence on the human appetite to cause "anorexia." You have to remember that cultural influences, regular eating behavior, and contractions of the stomach also cause hunger. In addition to all that, anorexia is not a condition caused by the hypothalamus. Anorexia is more of a cognitive disability. I'm no scientist or doctor, so you should definitely take a visit to the library before making generalizations based on just what I say.
What would happen if the DNA was damaged?
it could change the entire dna structure, and cause deformations
What is a temporary disturbance of the brain's ability to function?
brain's ability to shift function from damaged to undamaged areas.
What are brodman areas of the brain?
The Brodman areas of the brain are divisions of the brain as published by Korbinian Brodman in 1909. He defined around 50 areas of the human brain. His studies were based on cell structure and assumed function.
What does the brain vertex do?
I'm not quite sure what it does, but its in the highest front part of the brain.
The Cortex is the outermost part of the brain (cortex means "bark")
Does extasy produce serotonin?
Yes, ecstasy produces mass amounts of serotonin, which gives you that feel good and happy feeling. But, on the other side of it, the next day your body has over used its serotonin so there is none flowing into your body, which makes you depressed and/or lethargic.
Yes. Our ability to adapt is the basis for intelligence. All living organisms adapt to the environment around them in order to survive. If you visited an unfamiliar country you would quickly learn the cultural differences and adapt many of them to be accepted.
Adaption occurs at the level of the synapse. It can be in the form of 1. Hebian synapse (Pavlovian Conditioning) which permanently alters the neuron (in a simplified explanation) form new connections.
Or it can be in the form of non-hebian synapse (Alpha conditioning) which is basically sensitization, so turning the volume up or down on the release of neurotransmitters until the stimulus is removed then the neurons revert back to normal.
Although adults can no longer make new neuron cells, the brain is constantly changing. The neurons already present still develop and make new connections all the time.
What is brain can you explain brain parts?
The parts of the brain are the cerebrum, cerebellum and the brain stem. The cerebrum makes up 90% of the brain and controls speech, memory, thoughts and all conscious actions. The cerebellum controls balance and co-ordinates complex muscle movements.
The brain stem controls all unconscious thoughts such as ; heat rate and breathing
It makes no sense because the facial muscles are innervated by the facial nerve. And this nerve comes off the brain stem.
A zebra's brain is about twice the size of a Size 8 soccer boot. The zebra has a larger brain compared to many other mammals its size.
Does someones gender affect their auditory and visual memories?
It is mostly on age. Your memory decreases as you get older.
Gangrene of brain is uncommon, but has been known to happen.
What in the body signals the spinal cord to initiate urination?
See also:The neural control of micturition. Clare J. Fowler, Derek Griffiths, and William C. de Groat. Published in final edited form in: Nat Rev Neurosci. 2008 Jun; 9(6): 453–466.
Quoted: "The neural pathways that control lower-urinary-tract function are organized as simple on–off switching circuits that maintain a reciprocal relationship between the urinary bladder and the urethral outlet. Storage reflexes are activated during bladder filling and are organized primarily in the spinal cord, whereas voiding is mediated by reflex mechanisms that are organized in the brain (FIG. 5)."
