0
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 is the Impairment in speech due to a brain lesion?
Speech is simply one of those issues that is vital that is going to demand professional attending regarding
What to do when there is not enough fluids going into the brain?
your body should naturally replenish it on its own a small loss in spinal fluid should have to large of an effect to cause any permanent damage to your brain or nervous system
Does the brain produce electrical activity while you are asleep?
The brain is electrically active both during sleep and while awake. The brain produces more activity when a person sleeps When a person is asleep, the brain goes through different stages of sleep. With each stage of dreaming, there is increase of neuronal activity.
How does the nervous system aid in the survival of so many organisms?
The are a couple of evolutionary advantages of an organism developing a central nervous system. The main evolutionary advantage of an organism developing a central nervous system is the brain.
The brain is a funny shape that is unexplainable to describe. Its kind of like a squiggy circle with bumps. Erm, if anyone has a better answer, be sure to edit.
Secretory organ at the base of the brain?
The brain stem is located at the base of the brain, but maybe you are referring to the pituitary gland.
The cerebellum is a fist sized structure located at the base of the brain. It has many more neurons than the cortex.
Where is the primary sensory cortex located?
The primary sensory cortex (or primary somatosensory cortex) is part of the postcentral gyrus in the brain, which forms part of the parietal lobe.
The main function of the primary sensory cortex is it is a receptor for the sense of touch.
parietal lobe
Can seizures cause brain tissue loss?
No.
Brain freeze is a headache most commonly associated with the quick consumption of cold substances, such as ice cream. When the cold substance comes into contact with your palate or the roof of your mouth and sinus cavities it causes the blood vessels to vasoconstrict or get smaller.
As the palate warms the blood vessels dilate. This rapid constriction and dilation is detected by pain receptors that travel to the brain via the trigaminal nerve, which also serves as one of the major nerves for the facial area. Because the pain signal travels with the signals coming from the face, the brain thinks it is feeling pain in the face that isn't really there, this is called referred pain.
The only way the brain is effected is how it perceives the information received from the nerve.
http://wiki.answers.com/What_does_a_brain_freeze_do_to_the_brain#ixzz17kJwkNDd
What type of women do men like best?
Funny, has a good personality, bubbly, loving, smart, optimistic, a good companion, a best friend, and physical attraction never hurts.
Summary: Always try to be optimistic and open, but not to the point where people can take advantage of you.
What type of muscle bends the knee?
Hamstrings ( Biceps Femoris, Semitendinosus & Semimembranosus) are the Agonistic Muscles
Quadricpes ( Rectus Femoris, Vastus Lateralis, Vastus Medialis & Vastus Intermedius) are the Antagonistic Muscles
Hope I Helped... Sharnie x :)
How is the brain involved in a reflex arc?
yes brain i s involved in reflex actions as it makes a pathway for sensory neuron to connect with and brain then directs the motor neuron to take a particular action which is given by effector !(muscles)
Yes it is matter. Since the receptors in your nose only respond to molecules, the "smell" of perfume must be matter in order to activate these receptors. The liquid in perfume is atomized by the pump, physically separating the molecules. The "smell" that you are sensing is the vaporization of aromatic organic molecules from the liquid.
Primary motor area associated with speech?
-Broca's speech area
•neural circuits between Broca's speech area, the premotor area, and primary motor area activate muscles of the larynx, pharynx, and mouth and breathing muscles
Yes, there are 2 halves that makes it look like you only have 1 brain (since they are so close to each other), but you actually have 2.
What part of the brain controls involuntary movements?
Control is probably not the correct word to use for this question.
Involuntary muscle movements originate from and are mediated by areas at the base of the brain, but the brain is circuited.
There are different types of involuntary movement. For example, you can experience the involuntary movement of muscles which normally are under voluntary control - twitches, shaking, "spasms"(dystonia).
This problem can originate from the basal ganglia.
However, you have different types of muscle which is "wired" to different parts of the brain. For example, your colon, small intestine, stomach are smooth muscle and you have no "conscious" control over those and those muscles are "controlled" by a relatively smaller circuit in the brain.
You have heart muscle, bronchi, and diaphragm. These are controlled deep in the base of your brain and brain stem. This is where illegal drugs can cause depression or over-excitement of nerve cell activity which can lead to cardiac arrest or irregular breathing. Marijuana does not affect the brain stem, that is why over-dose does not cause death.
You also have a "motor cortex" where you can have a seizure which can cause involuntary muscle movements; seizures can be focal so that only smaller parts of the body are affected.
This sort of depends on what kind of involuntary movement we are talking about.
The basic answer is the basal ganglia.
This is the name of the group of interconnected brain areas.
"ballistic" movements (ones which can't be controlled once initiated) are controlled by the basal ganglia.
Damage to an area of the the basal ganglia called the stratium causes Huntington's Chorea (symptoms: wild, involuntary movements)
Damage to an area of the basal ganglia called the substantia nigra causes Parkinson's disease (symptoms: tremors and movement difficulty).
Therefore, you can see that a balance between the stratium and the substantia nigra is essential.
However, some involuntary movements, such as withdrawing your hand after putting it on something very hot are not controlled by the brain at all- they use the peripheral nervous system, meaning that the nerve impulses do not travel to the brain as the coordinator, but use a relay neuron in the spinal cord instead.
What is a Hyperintense T2 signal mass in the region of the head of the pancreas?
what is hyper intense t2 lesion in the right liver lobe
What affects the accuracy of memory?
Human memory is an amazing thing, but there are many ways memory can fail. Here is a brief explanation of Daniel Schacter's "seven sins of memory."
Three sins of forgetting:
- Encoding failure from absent-mindedness. If we paid attention to every single detail it would be really overwhelming, so oftentimes certain information never enters our long-term memories and thus we cannot recall it later.
- Storage decay over time, which is called transience. Oftentimes the memory we have successfully stored is just forgotten later on. This is usually caused by lack of rehearsal (e.g. using the Spanish vocabulary you learned three years ago) and a weakening of neural connections.
- Blocking or retrieval failure. When we are given a lot of similar information, we may store everything but it can be difficult to recall one particular thing out of a large collection. We learn a lot of names in our lives but cannot always remember them all. New information can interfere with recalling old information, and vice versa. Retrieval cues, such as seeing the face of the person, may help.
Three sins of distortion:
- Misattribution. If you've ever thought Sally disliked chocolate when it was really Hannah, you've misattributed your information. When we encode memories, different aspects are distributed to the part of the brain that deals with that type of info. In these cases, the source part of the memory hasn't been sent correctly.
- False memories due to our suggestibility. Sometimes we are given or imagine misinformation and incorporate it into our memory, so later on we remember it as true.
- Bias can also distort our recollections. If students are given cumbersome projects periodically throughout the year, they may remember the teacher as tough or unfair despite having a lot of fun in the class initially.
One sin of intrusion:
- Persistence of unwanted memories. If we are reliving memories constantly, the theory would be that they stay accurate and fresh in the mind. However there is a likelihood for our imaginations to get away with us and exaggerate/add details - particularly with unwanted or fear-inducing memories.
