Neuroscientist

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Santiago Ramon y Cajal, the father of modern neuroscience and a Spanish neuroscientist, received the Nobel Prize in Medicine in 1906 for his discovery of the neuron doctrine. He shared the prize with Camillo Golgi, an Italian neuroscientist who was recognized for his staining technique that allowed neurons to be visualized. Santiago Ramon y Cajal (1852-1934) portrait (restored).jpg
Santiago Ramón y Cajal, the father of modern neuroscience and a Spanish neuroscientist, received the Nobel Prize in Medicine in 1906 for his discovery of the neuron doctrine. He shared the prize with Camillo Golgi, an Italian neuroscientist who was recognized for his staining technique that allowed neurons to be visualized.

A neuroscientist (or neurobiologist) is a scientist specializing in neuroscience that deals with the anatomy and function of neurons, neural circuits, and glial cells, and their behavioral, biological, and psychological roles in health and disease. [1]

Contents

Camillo Golgi (1843-1926), Italian physician, neuroscientist, and namesake of the Golgi apparatus Camillo Golgi 2.jpg
Camillo Golgi (1843–1926), Italian physician, neuroscientist, and namesake of the Golgi apparatus

Neuroscientists generally work as researchers within a college, university, government agency, or private industry setting. [2] In research-oriented careers, neuroscientists design and conduct scientific experiments on the nervous system and its functions. They can engage in basic or applied research. Basic research seeks to expand current understanding of the nervous system, whereas applied research seeks to address a specific problem, such as developing a treatment for a neurological disorder.

Neuroscientists have numerous career opportunities outside of academic research, including careers in industry, science writing, government program management, science advocacy, and education. [3] A neuroscientist commonly holds a doctorate in a medical science.

Job overview

Job description

A dissected sheep brain Sheep Brain Dissection 2 - black background.png
A dissected sheep brain

Neuroscientists focus primarily on the study and research of the nervous system. The nervous system is composed of the brain, spinal cord and nerve cells. Studies of the nervous system may focus on the cellular level, as in studies of the ion channels, or instead may focus on a systemic level as in behavioural or cognitive studies. A significant portion of nervous system studies is devoted to understanding the diseases that affect the nervous system, like multiple sclerosis, Alzheimer's, Parkinson's, and Lou Gehrig's. Research commonly occurs in private, government and public research institutions and universities. [4]

Some common tasks for neuroscientists are: [5]

Salary

The overall median salary for neuroscientists in the United States was $79,940 in May 2014[ where? ]. Neuroscientists are usually full-time employees. Median salaries at common work places in the United States are shown below. [5]

Common Work PlacesMedian Annual Pay
Colleges and universities$58,140
Hospitals$73,590
Laboratories$82,700
Research and Development$90,200
Pharmaceutical$150,000

Work environment

Neuroscientists research and study both the biological and psychological aspects of the nervous system. [5] Once neuroscientists finish their post doctoral programs, 39% go on to perform more doctoral work, while 36% take on faculty jobs. [6] Neuroscientists use a wide range of mathematical methods, computer programs, biochemical approaches and imaging techniques such as magnetic resonance imaging, computed tomography angiography, and diffusion tensor imaging. [7] Imaging techniques allow scientists to observe physical changes in the brain and spinal cord, as signals occur. Neuroscientists can also be part of several different neuroscience organizations where they can publish and read different research topics.

Job outlook

Neuroscience is expecting job growth of about 8% from 2014 to 2024, a considerably greater than average job growth rate when compared to other professions. Factors leading to this growth include an aging population, new discoveries leading to new areas of research, and increasing utilization of medications. Government funding for research will also continue to influence the demand for this specialty. [5]

Education

Neuroscientists typically enroll in a four-year undergraduate program and then move on to a PhD program for graduate studies. Once finished with their graduate studies, neuroscientists may continue doing postdoctoral work to gain more lab experience and explore new laboratory methods. In their undergraduate years, neuroscientists typically take physical and life science courses to gain a foundation in the field of research. Typical undergraduate majors include biology, behavioral neuroscience, and cognitive neuroscience. [8]

Many colleges and universities now have PhD training programs in the neurosciences, often with divisions between cognitive, cellular and molecular, computational and systems neuroscience.

Interdisciplinary fields

Neuroscience has a unique perspective in that it can be applied in a broad range of disciplines, and thus the fields neuroscientists work in vary. Neuroscientists may study topics from the large hemispheres of the brain to neurotransmitters and synapses occurring in neurons at a micro-level. Some fields that combine psychology and neurobiology include cognitive neuroscience, and behavioural neuroscience. Cognitive neuroscientists study human consciousness, specifically the brain, and how it can be seen through a lens of biochemical and biophysical processes. [9] Behavioral neuroscience encompasses the whole nervous system, environment and the brain how these areas show us aspects of motivation, learning, and motor skills along with many others. [10] Computational neuroscience uses mathematical models to understand how the brain processes information. [11]

History

Egyptian understanding and early Greek philosophers

Hieroglyphic stating the word, "brain", dated to 1700 BC. This work is considered a copy of an original writing as old as 3000 BC. Hieroglyphic-brain.jpg
Hieroglyphic stating the word, "brain", dated to 1700 BC. This work is considered a copy of an original writing as old as 3000 BC.

Some of the first writings about the brain come from the Egyptians. In about 3000 BC the first known written description of the brain also indicated that the location of brain injuries may be related to specific symptoms. This document contrasted common theory at the time. Most of the Egyptians' other writings are very spiritual, describing thought and feelings as responsibilities of the heart. This idea was widely accepted and can be found into 17th century Europe. [12]

Plato believed that the brain was the locus of mental processes. However, Aristotle believed instead the heart to be the source of mental processes and that the brain acted as a cooling system for the cardiovascular system. [13]

Galen

In the Middle Ages, Galen made a considerable impact on human anatomy. In terms of neuroscience, Galen described the seven cranial nerves' functions along with giving a foundational understanding of the spinal cord. When it came to the brain, he believed that sensory sensation was caused in the middle of the brain, while the motor sensations were produced in the anterior portion of the brain. Galen imparted some ideas on mental health disorders and what caused these disorders to arise. He believed that the cause was backed-up black bile, and that epilepsy was caused by phlegm. Galen's observations on neuroscience were not challenged for many years. [14]

Medieval European beliefs and Andreas Vesalius

Medieval beliefs generally held true the proposals of Galen, including the attribution of mental processes to specific ventricles in the brain. Functions of regions of the brain were defined based on their texture and composition: memory function was attributed to the posterior ventricle, a harder region of the brain and thus a good place for memory storage. [12]

Andreas Vesalius redirected the study of neuroscience away from the anatomical focus; he considered the attribution of functions based on location to be crude. Pushing away from the superficial proposals made by Galen and medieval beliefs, Vesalius did not believe that studying anatomy would lead to any significant advances in the understanding of thinking and the brain. [12]

Current and developing research topics

Research in neuroscience is expanding and becoming increasingly interdisciplinary. Many current research projects involve the integration of computer programs in mapping the human nervous system. The National Institutes of Health (NIH) sponsored Human Connectome Project, launched in 2009, hopes to establish a highly detailed map of the human nervous system and its millions of connections. Detailed neural mapping could lead the way for advances in the diagnosis and treatment of neurological disorders.

Neuroscientists are also at work studying epigenetics, the study of how certain factors that we face in our everyday lives not only affect us and our genes but also how they will affect our children and change their genes to adapt to the environments we faced.

Behavioral and developmental studies

Neuroscientists have been working to show how the brain is far more elastic and able to change than we once thought. They have been using work that psychologists previously reported to show how the observations work, and give a model for it.

L-phenylalanine L-Phenylalanine wpmp.png
L-phenylalanine

One recent behavioral study is that of phenylketonuria (PKU), a disorder that heavily damages the brain due to toxic levels of the amino acid phenylalanine. Before neuroscientists had studied this disorder, psychologists did not have a mechanistic understanding as to how this disorder caused high levels of the amino acid and thus treatment was not well understood, and oftentimes, was inadequate. The neuroscientists that studied this disorder used the previous observations of psychologists to propose a mechanistic model that gave a better understanding of the disorder at the molecular level. This in turn led to better understanding of the disorder as a whole and greatly changed treatment that led to better lives for patients with the disorder. [15]

Another recent study was that of mirror neurons, neurons that fire when mimicking or observing another animal or person that is making some sort of expression, movement, or gesture. This study was again one where neuroscientists used the observations of psychologists to create a model for how the observation worked. The initial observation was that newborn infants mimicked facial expressions that were expressed to them. Scientists were not certain that newborn infants were developed enough to have complex neurons that allowed them to mimic different people and there was something else that allowed them to mimic expressions. Neuroscientists then provided a model for what was occurring and concluded that infants did in fact have these neurons that fired when watching and mimicking facial expressions. [15]

Effects of early experience on the brain

Neuroscientists have also studied the effects of "nurture" on the developing brain. Saul Schanberg and other neuroscientists did a study on how important nurturing touch is to the developing brains in rats. They found that the rats who were deprived of nurture from the mother for just one hour had reduced functions in processes like DNA synthesis and hormone secretion. [15]

Michael Meaney and his colleagues found that the offspring of mother rats who provided significant nurture and attention tended to show less fear, responded more positively to stress, and functioned at higher levels and for longer times when fully mature. They also found that the rats who were given much attention as adolescents also gave their offspring the same amount of attention and thus showed that rats raised their offspring similar to how they were raised. These studies were also seen on a microscopic level where different genes were expressed for the rats that were given high amounts of nurture and those same genes were not expressed in the rats who received less attention. [15]

The effects of nurture and touch were not only studied in rats, but also in newborn humans. Many neuroscientists have performed studies where the importance of touch is shown in newborn humans. The same results that were shown in rats, also held true for humans. Babies that received less touch and nurture developed slower than babies that received a lot of attention and nurture. Stress levels were also lower in babies that were nurtured regularly and cognitive development was also higher due to increased touch. [15] Human offspring, much like rat offspring, thrive off of nurture, as shown by the various studies of neuroscientists.

Famous neuroscientists

Neuroscientists awarded Nobel Prizes in physiology or medicine

Eric Kandel, co-winner of the 2000 Nobel Prize in Physiology or Medicine CulturalEvents2 06$Feb$2009 xArea 1 Image.jpg
Eric Kandel, co-winner of the 2000 Nobel Prize in Physiology or Medicine

See also

Related Research Articles

<span class="mw-page-title-main">Neuron</span> Electrically excitable cell found in the nervous system of animals

A neuron, neurone, or nerve cell is an excitable cell that fires electric signals called action potentials across a neural network in the nervous system. They are located in the brain and spinal cord and help to receive and conduct impulses. Neurons communicate with other cells via synapses, which are specialized connections that commonly use minute amounts of chemical neurotransmitters to pass the electric signal from the presynaptic neuron to the target cell through the synaptic gap.

<span class="mw-page-title-main">Neuroscience</span> Scientific study of the nervous system

Neuroscience is the scientific study of the nervous system, its functions, and its disorders. It is a multidisciplinary science that combines physiology, anatomy, molecular biology, developmental biology, cytology, psychology, physics, computer science, chemistry, medicine, statistics, and mathematical modeling to understand the fundamental and emergent properties of neurons, glia and neural circuits. The understanding of the biological basis of learning, memory, behavior, perception, and consciousness has been described by Eric Kandel as the "epic challenge" of the biological sciences.

<span class="mw-page-title-main">Neurotransmitter</span> Chemical substance that enables neurotransmission

A neurotransmitter is a signaling molecule secreted by a neuron to affect another cell across a synapse. The cell receiving the signal, or target cell, may be another neuron, but could also be a gland or muscle cell.

<span class="mw-page-title-main">Cognitive neuroscience</span> Scientific field

Cognitive neuroscience is the scientific field that is concerned with the study of the biological processes and aspects that underlie cognition, with a specific focus on the neural connections in the brain which are involved in mental processes. It addresses the questions of how cognitive activities are affected or controlled by neural circuits in the brain. Cognitive neuroscience is a branch of both neuroscience and psychology, overlapping with disciplines such as behavioral neuroscience, cognitive psychology, physiological psychology and affective neuroscience. Cognitive neuroscience relies upon theories in cognitive science coupled with evidence from neurobiology, and computational modeling.

<span class="mw-page-title-main">Camillo Golgi</span> Italian biologist and pathologist (1843–1926)

Camillo Golgi was an Italian biologist and pathologist known for his works on the central nervous system. He studied medicine at the University of Pavia between 1860 and 1868 under the tutelage of Cesare Lombroso. Inspired by pathologist Giulio Bizzozero, he pursued research in the nervous system. His discovery of a staining technique called black reaction in 1873 was a major breakthrough in neuroscience. Several structures and phenomena in anatomy and physiology are named for him, including the Golgi apparatus, the Golgi tendon organ and the Golgi tendon reflex.

<span class="mw-page-title-main">Gerald Edelman</span> American biologist

Gerald Maurice Edelman was an American biologist who shared the 1972 Nobel Prize in Physiology or Medicine for work with Rodney Robert Porter on the immune system. Edelman's Nobel Prize-winning research concerned discovery of the structure of antibody molecules. In interviews, he has said that the way the components of the immune system evolve over the life of the individual is analogous to the way the components of the brain evolve in a lifetime. There is a continuity in this way between his work on the immune system, for which he won the Nobel Prize, and his later work in neuroscience and in philosophy of mind.

<span class="mw-page-title-main">Bernard Katz</span> German-British biophysicist (1911–2003)

Sir Bernard Katz, FRS was a German-born British physician and biophysicist, noted for his work on nerve physiology; specifically, for his work on synaptic transmission at the nerve-muscle junction. He shared the Nobel Prize in physiology or medicine in 1970 with Julius Axelrod and Ulf von Euler. He was made a Knight Bachelor in 1969.

The following outline is provided as an overview of and topical guide to neuroscience:

Behavioral neuroscience, also known as biological psychology, biopsychology, or psychobiology, is part of the broad, interdisciplinary field of neuroscience, with its primary focus being on the biological and neural substrates underlying human experiences and behaviors, as in our psychology. Derived from an earlier field known as physiological psychology, behavioral neuroscience applies the principles of biology to study the physiological, genetic, and developmental mechanisms of behavior in humans and other animals. Behavioral neuroscientists examine the biological bases of behavior through research that involves neuroanatomical substrates, environmental and genetic factors, effects of lesions and electrical stimulation, developmental processes, recording electrical activity, neurotransmitters, hormonal influences, chemical components, and the effects of drugs. Important topics of consideration for neuroscientific research in behavior include learning and memory, sensory processes, motivation and emotion, as well as genetic and molecular substrates concerning the biological bases of behavior. Subdivisions of behavioral neuroscience include the field of cognitive neuroscience, which emphasizes the biological processes underlying human cognition. Behavioral and cognitive neuroscience are both concerned with the neuronal and biological bases of psychology, with a particular emphasis on either cognition or behavior depending on the field.

<span class="mw-page-title-main">Paul Greengard</span> American neuroscientist (1925–2019)

Paul Greengard was an American neuroscientist best known for his work on the molecular and cellular function of neurons. In 2000, Greengard, Arvid Carlsson and Eric Kandel were awarded the Nobel Prize for Physiology or Medicine for their discoveries concerning signal transduction in the nervous system. He was Vincent Astor Professor at Rockefeller University, and served on the Scientific Advisory Board of the Cure Alzheimer's Fund, as well as the Scientific Council of the Brain & Behavior Research Foundation. He was married to artist Ursula von Rydingsvard.

From the ancient Egyptian mummifications to 18th-century scientific research on "globules" and neurons, there is evidence of neuroscience practice throughout the early periods of history. The early civilizations lacked adequate means to obtain knowledge about the human brain. Their assumptions about the inner workings of the mind, therefore, were not accurate. Early views on the function of the brain regarded it to be a form of "cranial stuffing" of sorts. In ancient Egypt, from the late Middle Kingdom onwards, in preparation for mummification, the brain was regularly removed, for it was the heart that was assumed to be the seat of intelligence. According to Herodotus, during the first step of mummification: "The most perfect practice is to extract as much of the brain as possible with an iron hook, and what the hook cannot reach is mixed with drugs." Over the next five thousand years, this view came to be reversed; the brain is now known to be the seat of intelligence, although colloquial variations of the former remain as in "memorizing something by heart".

<span class="mw-page-title-main">Patricia Goldman-Rakic</span> American neuroscientist

Patricia Goldman-Rakic was an American professor of neuroscience, neurology, psychiatry and psychology at Yale University School of Medicine. She pioneered multidisciplinary research of the prefrontal cortex and working memory.

UCL Neuroscience is a research domain that encompasses the breadth of neuroscience research activity across University College London's (UCL) School of Life and Medical Sciences. The domain was established in January 2008, to coordinate neuroscience activity across the many UCL departments and institutes in which neuroscience research takes place. In 2014, the Nobel Prize in Physiology or Medicine was awarded to the UCL neuroscientist John O'Keefe. In two consecutive years 2017 and 2018, the Brain Prize, the world's most valuable prize for brain research at €1m, was awarded to UCL neuroscientists Peter Dayan, Ray Dolan, John Hardy, and Bart De Strooper.

<span class="mw-page-title-main">May-Britt Moser</span> Norwegian psychologist and neuroscientist

May-Britt Moser is a Norwegian psychologist and neuroscientist, who is a Professor of Psychology and Neuroscience at the Norwegian University of Science and Technology (NTNU). She and her former husband, Edvard Moser, shared half of the 2014 Nobel Prize in Physiology or Medicine, awarded for work concerning the grid cells in the entorhinal cortex, as well as several additional space-representing cell types in the same circuit that make up the positioning system in the brain.

<span class="mw-page-title-main">Thomas C. Südhof</span> German-American biochemist

Thomas Christian Südhof, ForMemRS, is a German-American biochemist known for his study of synaptic transmission. Currently, he is a professor in the school of medicine in the department of molecular and cellular physiology, and by courtesy in neurology, and in psychiatry and behavioral sciences at Stanford University.

<span class="mw-page-title-main">John O'Keefe (neuroscientist)</span> American–British neuroscientist

John O'Keefe, is an American-British neuroscientist, psychologist and a professor at the Sainsbury Wellcome Centre for Neural Circuits and Behaviour and the Research Department of Cell and Developmental Biology at University College London. He discovered place cells in the hippocampus, and that they show a specific kind of temporal coding in the form of theta phase precession. He shared the Nobel Prize in Physiology or Medicine in 2014, together with May-Britt Moser and Edvard Moser; he has received several other awards. He has worked at University College London for his entire career, but also held a part-time chair at the Norwegian University of Science and Technology at the behest of his Norwegian collaborators, the Mosers.

<span class="mw-page-title-main">Department of Neurobiology, Harvard Medical School</span> Academic Department at Harvard University Medical School, USA

The Department of Neurobiology at Harvard Medical School is located in the Longwood Medical Area of Boston, MA. The Department is part of the Basic Research Program at Harvard Medical School, with research pertaining to development of the nervous system, sensory neuroscience, neurophysiology, and behavior. The Department was founded by Stephen W. Kuffler in 1966, the first department dedicated to neurobiology in the world. The mission of the department is “to understand the workings of the brain through basic research and to use that knowledge to work toward preventive and therapeutic methods that alleviate neurological diseases”.

Joseph Thomas Coyle Jr. is an American psychiatrist and neuroscientist. He is the Eben S. Draper Professor of Psychiatry and Neuroscience at Harvard Medical School.

The 2021 Nobel Prize in Physiology or Medicine was jointly awarded to the American physiologist David Julius and Armenian-American neuroscientist Ardem Patapoutian "for the discovery of receptors for temperature and touch." During the award ceremony on December 10, 2021, Nobel Assembly at Karolinska Institutet member Patrik Ernfors expressed:

"The 2021 Nobel Prize laureates have explained fundamental mechanisms underpinning how we sense the world within and around us. Our temperature and touch sensors are used all the time in every day of our lives. They continuously keep us updated about our environment, and without them even the simplest of our daily tasks would be impossible to perform."

References

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  11. ↑ "Computational neuroscience - Latest research and news | Nature". www.nature.com. Retrieved 2020-11-16.
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  14. ↑ Gross, Charles (1987). Neuroscience, Early History of. Encyclopedia of Neuroscience. pp. 843–847.
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  20. ↑ "The Nobel Prize in Physiology or Medicine 1944 - Speed Read". www.nobelprize.org. Archived from the original on 2016-04-01. Retrieved 2016-03-28.
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  28. ↑ "The Nobel Prize in Physiology or Medicine 2000 - Speed Read". www.nobelprize.org. Archived from the original on 2016-04-01. Retrieved 2016-03-28.
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