This pp was created for a PBL problem based on a brief overview on the histology of the cerebral cortex, epilepsy and EEG procedure and the mechanism of action of anticonvulsants
The cerebrum and the cerebellum are two of the four main regions of the human brain. People often confuse them because of their sound-alike names and their similar symmetrical structure.Although both play equally important roles in the brain, there are major differences between these two brain regions.
In this article, we will conduct a quick cerebrum vs. cerebellum comparison.
The human brain is one of the most mysterious and inexplicable things in human biology. Though a lot of research has been done, we still have much more to learn about the lobes of the brain.
lecture 4 from a college level introduction to psychology course taught Fall 2011 by Brian J. Piper, Ph.D. (psy391@gmail.com) at Willamette University, includes about 15 major brain areas, anatomical terminology, brain imaging procedures (CT, MRI, EEG, PET)
The central nervous system (CNS) is the part of the nervous system consisting of the brain and spinal cord. The central nervous system is so named because it integrates information it receives from, and coordinates and influences the activity of, all parts of the bodies
This pp was created for a PBL problem based on a brief overview on the histology of the cerebral cortex, epilepsy and EEG procedure and the mechanism of action of anticonvulsants
The cerebrum and the cerebellum are two of the four main regions of the human brain. People often confuse them because of their sound-alike names and their similar symmetrical structure.Although both play equally important roles in the brain, there are major differences between these two brain regions.
In this article, we will conduct a quick cerebrum vs. cerebellum comparison.
The human brain is one of the most mysterious and inexplicable things in human biology. Though a lot of research has been done, we still have much more to learn about the lobes of the brain.
lecture 4 from a college level introduction to psychology course taught Fall 2011 by Brian J. Piper, Ph.D. (psy391@gmail.com) at Willamette University, includes about 15 major brain areas, anatomical terminology, brain imaging procedures (CT, MRI, EEG, PET)
The central nervous system (CNS) is the part of the nervous system consisting of the brain and spinal cord. The central nervous system is so named because it integrates information it receives from, and coordinates and influences the activity of, all parts of the bodies
Your brain is the most complex technology anywhere in the world. It’s made up of three major parts: the forebrain, midbrain and hindbrain. These divisions allows us simplify and understand the functions of the brain.
The Biological MindChapter 4Biological Psycholog.docxmehek4
The Biological Mind
Chapter 4
Biological PsychologyBiological Psychology: a rich, interdisciplinary field of study that combines the methods and theories of psychology with those of biology, physiology, biochemistry, the neurosciences, and related fieldsStudies the relationship between behavior and bodily processes and systemsNeuroscience: the study of the nervous system, especially the brain
*
Lays foundation for the rest of the text… if we do not have a basic understanding of the body, we can never begin to understand behavior and mental processes. Our DNA, disease processes, chemical in our nervous system (neurotransmitters) and in our blood (hormones) can all influence our behavior and mental processes.
Methods that allow scientists to observe the activity of the living brain are beginning to answer questions that were once impossible to study.
The Nervous SystemCentral Nervous System (CNS): the brain and spinal cordPeripheral Nervous System (PNS): the nerves exiting the central nervous system that carry sensory and motor information to and from the rest of the body
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There are two major components of the nervous system:The central nervous system consists of the brain and spinal cordThe spinal cord and brain are cushioned by cerebrospinal fluid, which is generated by the ventriclesThe peripheral nervous system consists of the somatic nervous system and the autonomic nervous system (discussed in the next section)
The Structures of the BrainstemThe hindbrain is composed of the:Medulla: life-sustaining functionsPons: sleep, arousal, and facial expressionCerebellum: motor coordinationThe midbrain is involved in sensory reflexes, movement, and pain; connects hindbrain to upper brain areas.Together, the hindbrain and midbrain make up the brainstem.Reticular Formation: runs the length of the brainstem’s core; participates in the control of mood, arousal, and sleep
*
The hindbrain is composed of the medulla, pons, and cerebellum
The medulla merges with the spinal cordContains large bundles of axons traveling to and from higher levels of the brainManages many essential functions, such as heart rate and blood pressure, and thus, damage to the medulla usually results in quick death
The pons sits above the medullaInvolved with the management of sleep, arousal, and facial expressions Connects the cerebellum to the rest of the brain
The cerebellumEssential for maintaining balance and motor coordination and one of the first brain structures to be affected by alcoholRecent research suggests the cerebellum is involved in a wide range of functions including language, cognition, and perception
The midbrain sits above the ponsContains a number of structures involved in sensory reflexes, movement, and pain
The reticular formationRuns the length of the brainstem’s core from the upper medulla into the midbrain Participates in the control of mood, arousal, and sleep
Learn more about the brainstem and the cerebellum at https://www.youtube.com/watc ...
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Cerebellum
1. What Is The Cerebellum?
Get To Know Your Little
Brain
Riding a bike, crossing the street, typing a text message – as
simple as these tasks seem, you can’t perform them unless your
muscles are in perfect sync.
This coordination of muscle movement is one of the tasks
of the cerebellum, a cauliflower-shaped area in the back of your
brain.
2. Although relatively small, the cerebellum houses more than half
of all the neurons in the brain. Due to its complexity, it has long
been one of the most fascinating subjects of brain researchers
around the world.
In this informative guide, we take a detailed look at the
cerebellum and its primary functions. We also discuss some of the
more interesting scientific findings about this mysterious part of
the brain.
What Is The Exact Definition Of The
Cerebellum?
The Oxford Companion to the Body defines the cerebellum as an
“intricately corrugated ball of nervous tissue that lies under the
rear end of the cerebral hemispheres and is attached to the brain
stem by huge bundles of nerve fibers […] which carry information
to and from other parts of the brain.”
This ball of tissue is located in the back of the head, between the
cerebrum and the brain stem. One of the four main regions of the
brain, the cerebellum takes up about one-tenth of the total brain
volume.
The word cerebellum is Latin for little brain. It was first used
more than 500 years ago by the great Renaissance artist,
Leonardo da Vinci.
In 1504, while creating wax castings inside the human skull,
DaVinci discovered two symmetrical brain hemispheres hidden
just under the cerebrum. Because this newly discovered structure
3. looked like a smaller sibling of the brain, he nicknamed it the little
brain.
But DaVinci wasn’t the first to use the term.
In fact, the legendary Greek philosopher Aristotle used the Greek
word paregkephalis in the fourth century to describe the same
region of the brain that would, centuries later, become known as
the cerebellum.
What Does The Cerebellum Do?
4. The cerebellum has many important functions, but is most
notable for its coordination of muscle movement.
So, what does the cerebellum do and how does it work?
Every single voluntary movement we make starts as a signal that
forms in the motor cortex of the cerebrum. This signal then
travels to the cerebellum, which instructs the muscles to carry out
the movement.
But the cerebellum is more than just an intermediary between the
motor cortex and the muscles.
Before the movement signals reach the muscles, the cerebellum
combines them with information about the current position of the
body, which it receives from the spinal cord.
This allows for better coordination and enables your body to
move in a smooth and balanced way.
How The Cerebellum Works In Real Life
To better understand how this process works, here is a practical
example.
Let’s say you’re standing in your kitchen and want to grab a jar of
honey from the top shelf. While the idea to reach for the honey is
born in the cerebrum, there are several other things that need to
take place to turn that idea into action.
5. First of all, you need to consider the current position of your
body.
Then, your brain needs to make sure that all the muscles that will
take part in this process are under control and ready to move as
instructed.
In addition, your brain also needs to make adjustments to your
movement as you go. This is not unlike an airplane flying from
New York to Los Angeles. Although the course between the two
cities is constant, the route is subject to change due to variables
like weather and wind.
While you’re moving, your brain is also detecting errors and
correcting them (very quickly) to ensure you perform your
movement as planned.
In this example, it prevents you from reaching for the wrong shelf
or accidentally grabbing the jam instead of the honey jar next to
it.
All these functions – muscle coordination, body position
awareness, and error detection and correction – are carried out
by the cerebellum.
What Else Does The Cerebellum Do?
In addition to playing a crucial role in the coordination of muscle
movement, the cerebellum has many other important functions.
These include the following:
6. Maintaining physical balance and posture
The same way it detects and corrects errors in your movement,
the cerebellum can detect shifts in your body’s balance. It then
sends signals to motor neurons which instruct your body to
readjust its posture to maintain balance.
Motor learning
The cerebellum also helps your body master movements that
involve practice and fine-tuning in addition to physical skill. This
process is called motor learning and refers to a wide range of
movements – from breathing and walking to riding a bicycle or
playing an instrument.
Eye movement control
In addition to controlling body movement and motor learning, the
cerebellum is also important for your vision. Namely, it helps your
brain take full control of voluntary eye movements, thus allowing
for better eye-to-hand coordination. On top of that, the
cerebellum plays a part in peripheral vision.
7. How Is The Cerebellum Different From
Other Regions Of The Brain?
The cerebellum is one of the four main regions of the human
brain.
The other three regions are: the cerebrum, the brain stem, and
the diencephalon. Although they are interconnected, they differ in
size, position, and the primary function that they perform.
8. First up, the cerebrum, the largest part of the brain and also
known as the cerebral cortex (we define cerebral as pertaining to
the cerebrum).
It’s the part of the brain associated with thinking and other
related processes. Primary cerebrum function includes speech,
reasoning, problem-solving, memory, recognition, and perception
of stimuli.
Because of their similar names, the cerebrum is often confused
with the cerebellum. But when it comes to the cerebrum vs
cerebellum debate, it’s important to know these two brain
regions perform vastly different functions.
The cerebellum is in charge of the mechanical processes in the
body. The cerebrum controls the thinking behind those
processes.
Both are in charge of certain aspects of movement, which is
another reason why some people tend to confuse them.
The Other Major Regions Of The Brain
Another major brain region is the diencephalon, the majority of
which can only be seen by taking a cross-section of the brain.
The primary diencephalon function is directing sensory
information and related impulses throughout the body. It also
controls the autonomic, endocrine, and motor functions.
Finally, there is the brain stem, which is in charge of vital
functions like breathing, circulation, and digestion. This region of
9. the brain consists of two subregions – the pons and the medulla
oblongata.
The pons is located in the upper part of the brain stem and plays
an important part in the regulation of breathing. It holds the
nerve cells that control your breathing volume and rate.
In addition, this brain stem function transmits signals between
different parts of the brain and helps regulate deep sleep.
Working in tandem with the primary pons function is the medulla
oblongata, which takes up the lower part of the brain stem. In
addition to playing a role in breathing, proper medulla
function helps maintain optimal blood pressure and heart rate.
What’s more, the medulla is also in charge of involuntary actions
like coughing and sneezing.
10. Does The Cerebellum Play A Role In
Thinking?
Historically, scientists have thought of the cerebellum as the
“unconscious” part of the brain that is only in charge of
movement-related functions. This was in contrast with the
“conscious” cerebrum, which is thought of as the center of all
thinking-related activity in the brain.
However, recent research has challenged the idea of the “non-
thinking” cerebellum.
11. A pioneering study published in 2004 argued that the
cerebellum has the ability to fine-tune our thoughts in
much the same way as it does our movement.
More than a decade later, a 2017 study found a link between
structural variations in the cerebellum and the risk of mental
disorders.
In addition, a 2012 review found that the cerebellum may play a
role in mood and language processing, two brain functions
commonly associated with the cerebrum. More recently, scientists
have managed to identify the posterior lobe as the area of the
cerebellum that plays a part in cognition and emotion.
Although further research is needed, it is clear that there’s more
to the cerebellum than just movement.
What Happens When Your Cerebellum
Is Damaged?
Because the cerebellum is primarily in charge of movement, most
signs of a damaged cerebellum involve muscle control-related
disturbances. They can include the following:
• Insufficient muscle control resulting in poor coordination
• Walking difficulties and limited mobility
• Difficulty speaking and/or slurred speech
12. • Reduced ability to judge the distance between objects
• Abnormal eye movements
• Frequent falling
The most common form of cerebellum dysfunction is known
as ataxia.
Ataxia is the loss of muscle control and coordination, most often
as a result of a cerebellum-related health problem like a virus or a
brain tumor. Ataxia can also be genetic or occur as a result of
stroke, head injuries, or cerebral palsy.
Your brain is susceptible to the effects of toxins, and the
cerebellum is no exception. Ataxia can also be caused by
prolonged exposure to solvents (e.g. paint thinners) or heavy
metals like lead and mercury. What’s more, certain prescription
drugs and alcohol are also known to cause ataxia.
Can You Live Without A Cerebellum?
In theory, living without a cerebellum should cause severe
impairment of motor function, likely accompanied by cognitive
and behavioral difficulties. In practice, however, this isn’t always
the case.
A 2004 news story revealed that a then-24-year-old Chinese
woman went to the doctor complaining about nausea, only to
discover that she was one of just nine people in the whole
world to have lived without their cerebellum.
13. This finally helped explain the problems that the woman had
faced in early childhood. Namely, she was unable to walk until the
age of 7 and her speech was mostly unintelligible until she turned
6. As an adult, however, she experienced no problems that would
indicate a physical brain deficiency of any kind.
It turns out that the area of the brain where the cerebellum was
supposed to be was instead filled with cerebrospinal fluid. This, in
turn, provided cushioning for the brain and protected it against
diseases. According to the doctors, this only proves how
adaptable the human brain is.
14. How Can You Improve the Function of
the Cerebellum?
There are many things that you can do to improve the function of
your whole brain, including the cerebellum. Because this region of
the brain is most involved in physical movement, you need to
keep your muscles in optimal shape. The best way to do it is to
exercise on a regular basis.
Your brain is like a muscle – it grows stronger with use.
– Jim Kwik, Author of Mindvalley’s Superbrain Program
The cerebellum also plays a role in cognition, which is why you
need to take steps to increase brain power.
For example, you can take up meditation or yoga, listen to
classical music, play chess, or master the art of the power nap.
You can also try some proven techniques to improve your
memory.
In addition, you should avoid all things that could cause physical
damage to the cerebellum. This includes quitting smoking and
limiting your alcohol consumption, wearing protective helmets
while riding a bicycle, as well as boosting your immune system
with wholesome foods to ward off viruses.
The Final Word
Housing more than 100 billion neurons, the cerebellum is a
vital part of your brain. It coordinates muscle movement,
15. helps you acquire and develop motor skills, and plays a vital role
in vision.
Research also suggests that there is a link between the
cerebellum and cognition, which is one of the reasons scientists
are so eager to learn more about this region of the brain.