Thursday, September 29, 2022

What Does The Left Brain Control

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What Is Brain Lateralization

What Does the Left Side of the Brain Control

Information that enters the left hemisphere travel across the corpus callosum going to the right side of the brain and vice versa. The two hemispheres of the brain function interdependently.

Each of them has a role to play in the processing of information although the other is more dominant in certain functions. The process is called brain lateralization. The degree of brain lateralization is not the same in everyone.

Understanding Left Side Brain Injury

The brain acts as the control center for the entire body and is responsible for both physical and cognitive abilities. It consists of two hemispheres, each of which governs the opposite side of the body. For example, the left hemisphere commands movement on the right side of the body, and vice versa.

For most individuals, the right side of the brain is responsible for non-verbal, intuitive and creative actions such as musical and artistic ability. The left hemisphere, on the other hand, is in charge of verbal, analytical and logical functions.

Some specific functions the left hemisphere controls include:

  • Logic and reasoning
  • Right-hand control
  • Sequential thinking

The left side is also considered the language hub of the brain. It is where the bulk of your language abilities lie, particularly your ability to produce and understand language.

Therefore, most people with left-side brain injuries have difficulty speaking, a condition known as aphasia.

Lets take a closer look at aphasia, and other effects of left hemisphere damage,

Recovering From A Left

Though changes after a left-brain stroke are often abrupt and severe, the brain has an incredible ability to adjust and even reconnect neurological pathways. This ability is called neuroplasticity and occurs before youre even born. Throughout childhood and adulthood, new pathways form as new information is absorbed by the brain. After an injury, the brains neuroplasticity can be sparked to form new neurons and connections through the repetition of targeted rehabilitation exercises. It is only through this constant repetition that the brain rewires and brings to life the lost connections.

Exercises that focus on the right side of the body and reinforce analytical reasoning are the most effective methods to support the regrowth of neurological pathways in the left hemisphere. After all, the body and mind are forever learning. This is true even if portions of the brain are no longer fully functional. Neural functions can adjust and change, for the better, through the support of ongoing rehabilitation.

All content provided on this blog is for informational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. If you think you may have a medical emergency, call your doctor or 911 immediately. Reliance on any information provided by the Saebo website is solely at your own risk.

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What Can Happen If Your Frontal Lobe Is Damaged

A famous case of frontal lobe damage is that of Phineas Gage. In 1848, Gage was injured in an explosion that caused a railroad spike to pierce his frontal lobe. The resulting injury caused drastic changes in Gages personality and behavior.

As weve learned, the frontal lobe is responsible for many different types of functions. Because of this, damage to the frontal lobe can cause a variety of different symptoms depending on the area thats affected.

Some potential symptoms of frontal lobe damage can include:

  • loss of movement, either partial or complete , on the opposite side of the body
  • difficulty performing tasks that require a sequence of movements
  • trouble with speech or language
  • poor planning or organization

Treatment for damage to the frontal lobe depends on whats caused the damage to occur. If you have frontal lobe damage, your treatment plan may include a team of several types of healthcare professionals.

Some examples of potential treatments for frontal lobe damage include:

In some cases, the cause of the frontal lobe damage may be permanent. One example of this is neurodegenerative diseases. In these cases, treatment may also involve medications.

What Is The Gray Matter And White Matter

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Gray and white matter are two different regions of the central nervous system. In the brain, gray matter refers to the darker, outer portion, while white matter describes the lighter, inner section underneath. In the spinal cord, this order is reversed: The white matter is on the outside, and the gray matter sits within.

Gray matter is primarily composed of neuron somas , and white matter is mostly made of axons wrapped in myelin . The different composition of neuron parts is why the two appear as separate shades on certain scans.

Each region serves a different role. Gray matter is primarily responsible for processing and interpreting information, while white matter transmits that information to other parts of the nervous system.

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Each Part Of The Brain Controls What

The brain is a remarkable organ and incredibly complex. The three main regions of the brain are the midbrain, hindbrain and forebrain, which is broken up into additional sections including the frontal lobe, occipital lobe and temporal lobe that control different parts of the body. All of these work together like a well-oiled machine to allow humans to function properly.

The cerebellum is located at the lower back part of the brain. This part of the brain controls equilibrium and balance and allows humans to move correctly. It coordinates the muscles and joins so they can work together.

The occipital lobe controls vision. It is located at the very back part of the brain and affects how humans judge everything visual, from how something moves to how colors register. Two signs that something is wrong in this area of the brain are if the person experiences hallucinations or perceives colors differently.

A part of the brain called the temporal lobe controls a very important part of a person: memories. In addition, this specific part of the brain controls language functions, sexual functions and personality. It also has an effect on how the person perceives verbal and non-verbal input.

Injury In The Left Hemisphere Of The Brain

Since the left hemisphere of the brain controls the right side of the body, any injuries in it could lead to right-sided weakness. The following problems could arise:

  • Difficulty understanding both written and spoken words.
  • Difficulty expressing both written and spoken words.
  • The person finds it difficult to coordinate or program motor movements for speaking or medically called apraxia.
  • Slurred speech or change in the sound of the voice .
  • Difficulties with numbers.
  • Difficulty in dealing with complex problems.

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What Is The Personality Of A Left

Left-brained people prefer cold-hard facts and real-life data rather than emotions and imagination. Their systematic and stable personalities make them good candidates as reliable team leaders. They often pace themselves and do not overreact quickly.

When it comes to daily life, left-brain personalities approach it the same way they approach their professional or academic obligations. They strive to be as clear and direct as possible. Left-brain people like order and organize their daily plans as neatly and systematically as possible.

They remember events chronologically, usually in great detail, and approach every potential risk with necessary caution. When facing problems, they immediately try to find the most efficient solutions, and they are not easily distracted by their emotions.

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An example of a left-brained is when they watch a movie, they analyze it from a technical point of view. They evaluate the quality of a script as well as how good or bad the directing is.

How The Brain Works

Why Your Left Brain Hemisphere Controls The Right Parts Of Your Body

The brain is our motherboard, storage, operating system, and more. The nuances of its functions canât be summarized in a black-and-white dichotomy, which is how the left-and-right-brain idea came around.

The brain is divided into symmetrical left and right hemispheres. Each hemisphere is in charge of the opposite side of the body, so your right brain controls your left hand. The right hemisphere also takes in sensory input from your left side and vice versa.Â;

The brain is segmented into regions called lobes. Your lobes isolate your brainâs functions to specific areas.

  • The frontal lobe controls your body movement, personality, problem-solving, concentration, planning, emotional reactions, sense of smell, the meaning of words, and general speech.
  • Your parietal lobe controls your sense of touch and pressure, sense of taste, and bodily awareness.
  • The temporal lobe governs your sense of hearing, ability to recognize others, emotions, and long-term memory.Â;
  • The occipital lobe controls the important sense of sight.
  • The cerebellum governs fine motor control, balance, and coordination.
  • The limbic lobe controls emotions.Â;

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Broca And Wernicke’s Areas

Located at the front and middle of the left temporal lobe, respectively, Broca’s area and Wenicke’s area are the regions of the human brain that handle the formation and processing of language. Regardless of what language you’re using, these two regions allow you to form sentences, understand the meaning of what others are saying and pick up on verbal patterns. These regions are the reason why a left temporal lobe hemorrhage can leave a person unable to understand what someone is saying, or lead them to babble incoherently.

Symptoms Of Stroke In The Cerebellum And Brainstem

1) Symptoms of a cerebellum stroke

Although strokes are less common in the cerebellum area, the effects can be severe.Common effects of strokes in the cerebellum include:

  • Inability to walk and problems with coordination and balance

2) Symptoms of a brainstem stroke

The brainstem is located at the base of the brain right above the spinal cord. Many of the bodys vital life-support functions are controlled by the brainstem. It also helps to control the main nerves involved with eye movement, chewing, and swallowing and maintains the homeostasis.

Examples of functions on brainstem:

  • Breathing and heart functions
  • Vision
  • Coma

A stroke in the brainstem can be fatal. Some individuals who survive brainstem strokes are left with Locked-In Syndrome, a rare condition in they cannot make voluntary movements other than with their eyes.

The human nervous system has neuroplasticity. While damaged brain cells will not survive, neurons in intact brain areas continue to expand and change even after the acute incident .

These neurons can take over the information and roles that the damaged area was responsible for, and the body changes accordingly. Neuroplasticity regenerates the brain’s nerves and improves body functions through sensory and motor stimuli from the outside. This is why ongoing rehabilitation is beneficial after a stroke.

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What Defines Left And Right Brained People

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  • Resources

The human brain is the command centre of our bodies. It contains roughly 86 billion nerve cells, can generate up to 50,000 thoughts per day, and it can process information faster than a Formula One car can travel!

“Brain information can travel up to 268 mph!”

On top of all of this, it is widely believed that the structure of our brain plays a key role in shaping the different characteristics of our personalities.

Your brain has two sides, which are known as hemispheres. The left hemisphere controls the right side of your body, dealing with logical thought and linguistic functions. The right hemisphere controls the left side of your body, dealing with things such as our imagination, spacial orientation and intuition.

Extensive research into the two sides of the brain is what inspired Neuropsychologist, Roger W Sperry to develop his left brain/right brain theory.

Sperry developed the left brain/right brain theory in 1960. He believed that each human brain is either right or left side dominant. Each side of the brain controls different types of thinking and therefore different personality traits. He believed that some individuals utilise both sides of their brains equally, but most people have a tendency to think in either a more left or right brain way.

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Lobes Of The Brain And What They Control

Each brain hemisphere has four sections, called lobes: frontal, parietal, temporal and occipital. Each lobe controls specific functions.

  • Frontal lobe. The largest lobe of the brain, located in the front of the head, the frontal lobe is involved in personality characteristics, decision-making and movement. Recognition of smell usually involves parts of the frontal lobe. The frontal lobe contains Brocas area, which is associated with speech ability.
  • Parietal lobe. The middle part of the brain, the parietal lobe helps a person identify objects and understand spatial relationships . The parietal lobe is also involved in interpreting pain and touch in the body. The parietal lobe houses Wernickes area, which helps the brain understand spoken language.
  • Occipital lobe. The occipital lobe is the back part of the brain that is involved with vision.
  • Temporal lobe. The sides of the brain, temporal lobes are involved in short-term memory, speech, musical rhythm and some degree of smell recognition.

What Are Some Characteristics Of The Left Side Of The Brain

People are often categorized either as left-brained and right-brained, meaning one side of their brain is dominant.

In this article, we will explore specifically the left brain characteristics, what they are, what it means to be a left-brain person, and how you can align your left brain using your knowledge, skills, and talents to reach your brains full potential.

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Evolution Of Brain Asymmetries With Implications For Language

Human brain showing Broca’s and Wernicke’s areas and areas of chimpanzee brain showing leftward enlargement .

Image credit: Todd Preuss, Yerkes Primate Research Center .

Some accounts of language evolution have focused on mirror neurons, first identified in the monkey brain in area F5 , a region homologous to Broca’s area in humans, but now considered part of an extensive network more widely homologous to the language network . Mirror neurons are so called because they respond when the monkey performs an action, and also when they see another individual performing the same action. This mirroring of what the monkey sees onto what it does seems to provide a natural platform for the evolution of language, which likewise can be seen to involve a mapping of perception onto production. The motor theory of speech perception, for example, holds that we perceive speech sounds according to how we produce them, rather than through acoustic analysis . Mirror neurons in monkeys also respond to the sounds of such physical actions as ripping paper or dropping a stick onto the floor, but they remain silent to animal calls . This suggests an evolutionary trajectory in which mirror neurons emerged as a system for producing and understanding manual actions, but in the course of evolution became increasingly lateralized to the left brain, incorporating vocalization and gaining grammar-like complexity . The left hemisphere is dominant for sign language as for spoken language .

The Functions Of The Left Temporal Lobe

What’s the Difference Between the Right Brain and Left Brain?

The temporal lobes of the brain may not seem like much at first glance: The thumb-shaped areas at the sides of your brain aren’t as large as the frontal or parietal lobes, and they aren’t referenced or discussed as often as the cerebellum positioned just below. However, these oft-overlooked lobes are one of the most important parts of your brain. Without them, you wouldn’t be able to remember reading this paragraph 15 minutes from now and without the left side of your temporal lobe, you wouldn’t be able to read it in the first place. This is because, in addition to a number of other critical mental functions, the temporal lobe controls language and memory. The left side in particular is home to a number of unique areas worth paying attention to.


The temporal lobes of the human brain are in charge of a wide variety of functions: The lobes control memory, sound processing and facial recognition, and temporal lobe damage has been known to impact a person’s personality in addition to impairing these functions. Left temporal lobe function in particular is critical for the understanding and use of language, as that lobe is home to Broca and Wernicke’s areas.

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