behavior and brain

BRAIN DAMAGE AFFECTS MENTAL PROCESSES AND BEHAVIOR
IMPACT OF DAMAGE TO THE BRAIN’S PARTS ON ONE’S MENTAL PROCESSES AND BEHAVIOR
Abstract
Brain, the vital component of the central nervous system (CNS), affects a person’s “mental process” which can be expanded to include behavior, thinking, learning, personality, and psychological aspects of the mind. Causes like prolonged hypoxia (shortage of oxygen), poisoning, infection, and neurological illness lead to widespread brain damage whereas physical trauma (traumatic brain injury), stroke, aneurysm or neurological illness lead to localized brain damage. Assessment of extent of brain injury is done by neurological examination, neuroimaging, and neuropsychological assessment techniques like magnetic resonance imaging (MRI), functional magnetic resonance imaging (FMRI), computed tomography (CT), positron emission tomography (PET), single photon emission computed tomography (SPECT) etc (“Brain damage,” n.d.). Some of the impacts on the metal processes due to damage of the brains parts like Medulla oblongata, Reticular formation, Cerebellum, Hypothalamus, Amygdale and Hippocampus have been discussed in the article below.
Medulla Oblongata
The medulla oblongata or the medulla, acts as a relay station transmitting the nerve signals between brain and the spinal cord. It controls autonomic functions like breathing, heart rate, swallowing, vomiting, defecation, urination etc. A person suffering from damage to medulla oblongata is considered to be brain dead or in a persistent vegetative state (when the body depends on a ventilator or other supportive equipment). Depending on the nature of the damage, the person may recover or die after this life support is removed. Smith (n.d.)
Reticular Formation
The reticular formation is a comprehensive network of nerve fibers located in the central area of the brain stem. Some of the vital functions performed by it include ability to obtain recuperative sleep, sexual arousal, and the ability to focus on tasks without being easily distracted. Effects of damage to the reticular formation include a constant feeling of fatigue, disturbed sleep pattern and lack of control on wakefulness leading a person to a coma state. It also shows a negative impact on a person’s ability to concentrate, as well as sexual arousal.
Cerebellum
The cerebellum or the little brain is only 10% of the weight of the brain, but contains as many neurons as all the rest of the brain combined. It integrates visual, auditory, vestibular, and somatosensory information received from various channels. This integrated information is modified to promote coordination of voluntary motor movement, balance and equilibrium and muscle tone. Data from clinical and functional studies indicate that the cerebellum also regulates memory processes (Arriada-Mendicoa, Otero-Siliceo & Corona-Vázquez, 1999). Damage to cerebellum leads to multiple effects like:
1) loss of coordination of motor movement (asynergia)
2) inability to judge distance and when to stop (dysmetria)
3) inability to perform rapid alternating movements (adiadochokinesia)
4) movement tremors (intention tremor)
5) staggering, wide based walking (ataxic gait)
6) tendency toward falling
7) weak muscles (hypotonia)
8) slurred speech (ataxic dysarthria)
9) abnormal eye movements (nystagmus) (“Cerebellum”, n.d.)
Hypothalamus
Hypothalamus forms a critical link between autonomic nervous system and endocrine system. The primary function of hypothalamus is homeostasis i.e.: maintaining blood pressure, body temperature, fluid and electrolyte balance, and body weight to a precise value called the set-point. It maintains the four basic biological needs or four F’s of survival: fighting, fleeing, feeding, and reproduction. Damage to hypothalamus influences food intake, weight regulation, thirst, body heat, balance, sleep cycle, response to pain, levels of pleasure, sexual satisfaction, anger and aggressive behavior. Its damaging effect on autonomic nervous system is seen when homeostasis is disturbed.
Amygdale
The amygdale is a part of the limbic system (also referred to as emotional brain) and is found buried within the cerebrum. It is connected to hypothalamus and prefrontal cortex influencing the emotional feelings and related physiological responses to certain situations such as those that warn of pain or other unpleasant consequences or signify the presence of food, water, salt, potential mates or rivals, or infants in need of care. Stimulation of amygdale in humans primarily causes fear and fear-related responses leading to an increased heart rate and pupil dilation. The amygdala of male is a bit bigger than that of the female. Stimulation of the amygdala will produce penile erection, sexual sensation (lust), representations or memories of intercourse and orgasm including its important role in pregnancy in case of women. It also has the ability to respond to emotional stimuli conveyed through sound, or by facial expression. Damage to the amygdale hampers autonomic responses and also leads impairment of the ability to learn new emotions as well as to react appropriately in different situations. Due to this, the patient fails to recognize a dangerous situation.
Hippocampus
The hippocampus, another part of the limbic system, is associated with long-term memory and spatial navigation. In the case of Alzheimer’s disease, hippocampus is one of the first regions of the brain to suffer damage, leading to memory problems. People with extensive hippocampal damage may experience amnesia - the inability to form or retain new memories. The hippocampus acts as a memory "gateway" through which new memories must pass before entering permanent storage in the brain. Thus people with damage to the hippocampus can remember the distant past but cannot form new memories (Catherine, 2006).
References
1) Arriada-Mendicoa, N., Otero-Siliceo, E., & Corona-Vázquez, T. (1999). Current concepts regarding the cerebellum and cognition. Rev Neurol, 29(11), 1075-82.
2) Brain damage. (n.d.). In Science Daily. Retrieved October 8, 2009, from http://www.sciencedaily.com/articles/b/brain_damage.htm
3) Catherine, E. (2006). Memory Loss and the Brain. Retrieved October 8, 2009, from http://www.memorylossonline.com/glossary/hippocampus.html
4) Cerebellum. (n.d.). Retrieved October 8,2009, from http://www.neuroskills.com/tbi/bcerebel.shtml
5) Smith, S. (n.d.). What is medulla oblongata? Retrieved from http://www.wisegeek.com/what-is-the-medulla-oblongata.htm
About the Author
Post Graduate in Bio-Chemistry and PG Diploma in Bio-informatics. Worked as a Bio-informatics professional for about 2 years and moved on to a home-based job since.
Webpage - http://purnasrinivas.webs.com
Split brain behavioral experiments
![]() |
![]() NEW Learning and Memory From Brain to Behavior US $69.99
|
![]() Introduction to Brain and Behavior by Bryan Kolb Ia US $18.00
|
![]() Brain Mind and Behavior by Annenberg CPB Project US $70.00
|
![]() Brain and Behavior US $70.00
|
![]() |
Sprudio Subliminal Cd: Enjoy House Cleaning, Enjoy Housework / Housekeeping Chores,Subliminal Cd, with Nlp(neurolinguistic Programming Imbedded in Soothing Music and Calming Sounds of Ocean Waves)and Brain Wave Generator,enjoy Doing Chores, Make Your Life Easy.
Sale Price: $14.99 |
DescriptionCD with Nature Sound: The affirmations and suggestions are "buried" in the Ocean Waves Sound; all you hear is The Ocean Waves and the Nature Sound. Final Track Silent, can be used anywhere. There is not sound to be heard by conscious mind... |
![]() |
The Physical Causes of Mental Illness List Price: |
DescriptionVHS tape depicts some of the exciting research sponsored by the National Institute of Mental Health that is bringing hope to the 1 in 10 Americans who suffer from mental illnesses and brain disorders. This film shows how state-of-the-art brain scanners and molecular probes can help scientists see how mental illnesses affect the brain... |
![]() |
Prisoners of the Brain: Breakthrough Studies in the Chemistry of Mental Disorders (The Infinite Voyage Series) [VHS] |
DescriptionHow many Americans experience a serious psychiatric breakdown? One in seven people within any six-month period are affected by mental illness - a shocking statistic. This emotionally compelling program unlocks a scientifically complex issue facing our society... |
![]() |
Brain Damage List Price: Sale Price: $16.49 Average Rating: |
DescriptionStudio: Wea-des Moines Video Release Date: 07/22/2003 Run time: 85 minutes Rating: Nr |
![]() |
ABC News Primetime Austisic Children
Sale Price: $14.95 |
DescriptionMarc and Sophia Augier were overjoyed when their dream of a big family quickly became a reality with the birth of son Marcel and, little more than a year later, twin boys Christophe and Henri. Yet that dream turned into a nightmare when they found out that, incredibly, all three babies suffered from autism... |
![]() |
Life with Newborn
Sale Price: $14.99 |
DescriptionLife with Newborn is a 30 minute DVD based on research for new parents or caregivers of babies birth to 3 months of age. This video was created to help parents understand the importance of parenting during the first 3 months... |
![]() |
Vital Nutrients Lithium (orotate) 5mg 90 Capsules List Price: Sale Price: $16.72 |
DescriptionLithium has veen shown to enhance folate and B12 transport into L1210 brain cells. Since vitaming B12 and folate support mood associated parameters, the stimulation of the transport of these vitamins into brain cells by lithium may be cited as yet another mechanism for supporting mental and behavioral health using low nutritional dosage levels of lithium. |
![]() |
DaVinci Labs Behavior Balance - DMG Liquid- 12 Oz. List Price: Sale Price: $30.40 |
DescriptionBehavior Balance-DMG Liquid is an advanced, Phenol free, nutritional supplement that combines our patented N,N-Dimethylglycine (DMG) with Betaine, Folic Acid, Vitamins B6 and B12, Zinc, and Magnesium in a great tasting, natural black cherry flavored liquid... |
![]() |
Sprudio Subliminal Cd: End Anxiety- Anxiety Disorder, Panic, Fear, Nervousness, Stop Panic Attacks Anti-anxiety Attacks Mind Program with Nlp, Brainwave Entrainment Technology
Sale Price: $14.99 |
DescriptionCD with Nature Sound: The affirmations and suggestions are "buried" in the Ocean Waves Sound; all you hear is The Ocean Waves and the Nature Sound. Final Track Silent, can be used anywhere. There is not sound to be heard by conscious mind... |
![]() |
Blunders List Price: Sale Price: $18.57 Average Rating: |
DescriptionGrades K & up. Teach social graces with this exciting board game! Children will learn proper etiquette as they help Bobby, Brenda, Billy, and Becky Blunder navigate different social situations. Two or more players. |
|
|
Brain & Behavior $20.32 Brain & Behavior |
|
|
The Brain and Behavior $67.9 The Brain and Behavior |
|
|
The Brain And Behavior $51.91 Buy and sell [The Brain And Behavior] at great prices. |
|
|
Brain And Behavior $71.06 Buy and sell [Brain And Behavior] at great prices. |
|
|
Brain, Mind & Behavior $89.5 Brain, Mind & Behavior |
|
|
An Introduction to Brain And Behavior $36.22 An Introduction to Brain And Behavior |
|
|
An Introduction to Brain and Behavior $146.56 An Introduction to Brain and Behavior |
|
|
Brain, Mind, And Behavior $27.16 Brain, Mind, And Behavior |
|
|
How The Brain Influences Behavior $37.78 How The Brain Influences Behavior |
|
|
Introduction to Brain & Behavior $146.56 Introduction to Brain & Behavior |
|
|
Drugs, the Brain, and Behavior $135.8 Drugs, the Brain, and Behavior |
|
|
Hormones, Brain and Behavior $1467.39 Hormones, Brain and Behavior |


US $69.99










































![Prisoners of the Brain: Breakthrough Studies in the Chemistry of Mental Disorders (The Infinite Voyage Series) [VHS]](http://www.thefemalebrain.org/media/images/i/515g9F6N%2BnL._SL160_.jpg)


















































Recent Comments