• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Barry Jacobs presentation
Barry Jacobs presentation

... Learning (or behavioral plasticity) – the acquisition of a reversible change in behavior resulting from experience (consciously or unconsciously) ...
TECHNIQUES2001
TECHNIQUES2001

...  Positrons interact with electrons and produce photons of light  Detectors measure the photons  Functional but NO SPATIAL resolution  ? = Baseline state - STATE of INTEREST ...
consciousness
consciousness

... See http://www.med.harvard.edu/AANLIB/hms1.html ...
WARM UP 4/20
WARM UP 4/20

... • Myelin sheath - covering around the axon to protect it ...
Electrical Stimulation of the Brain
Electrical Stimulation of the Brain

... Functions Broca’s Area ...
Option A Neural Development Study Guide A1 A2
Option A Neural Development Study Guide A1 A2

... How the neural tube of embryonic chordates forms How differentiation of the neural tube produces neurons That immature neurons migrate to a final location That chemical stimuli influence the growth of axons to other parts of the body Multiple synapses form with developing neurons Unused synapses are ...
Damage to the frontal lobes can lead to
Damage to the frontal lobes can lead to

... Technology that allows us to see brain at work – EEG –charts brain’s electrical brain waves E for electricity! Output is a graph of lines registering different brain wave patterns – PET—shows where brain activity is occurring by showing where glucose is being consumed after person given radioactive ...
Analysis: Thought control v2_2
Analysis: Thought control v2_2

... EOG - electroculogram sensors, which record gross eye movements fNIR - functional near infrared, measuring the level of oxygenation in blood supply to the brain. ...
and memory
and memory

... Jackson: Lesion might well affect other structures in the brain because the lesion might have damaged neurons connected to other regions; diaschisis: damage of one part can create problems for another. Gestaltist view: The whole is different from the sum of its parts ...
The Teenage Brain
The Teenage Brain

... • Remove clutter even from walls • Allow movement, sit in the back or side • Do not get angry at their behavior; that will never fix the problem • Give extra time if noticeably distracted • Keep a stash of their materials in your room; help them with organization ...
The Review
The Review

... 5. What are the lobes of the brain? What is each lobe responsible for? 6. What is the somatosensory cortex and primary motor cortex? 7. Who is Phineas Gage, what happen to him, what were the effects? 8. What parts make up the hindbrain? What is the function of each part? 9. What makes up the midbrai ...
Neuroscience
Neuroscience

... Neurons contain cytoplasm, mitochondria and other organelles. Neurons carry out basic cellular processes such as protein synthesis and energy production. ...
Nervous System
Nervous System

... A neuron is a nerve cell that is specialized to transfer messages in the form of fast-moving electrical energy. These electrical messages are called impulses. A neuron has a large region in the center called the cell body. ...
Lecture 2 - Pegasus Server
Lecture 2 - Pegasus Server

... Sulcus= grooves on brain’s surface ...
ppt
ppt

... Areas in which neuronal activity occurs show patterns of activation which the scanner detects. The image is paired with a graph showing the blood flow in that region by experimental condition (moving vs. stationary dots in this case). ...
Central Nervous System
Central Nervous System

... • The spinal cord is like a jellylike bundle of nerve fibers, lies inside the spine. • The spinal cord acts as a central communication conduit between the brain and the rest of the body. • Millions of nerve fibers within the cord carry motor information from the brain to the muscles and other conve ...
CNS: Spinal Cord Function
CNS: Spinal Cord Function

... • Cerebrum: largest portion; last to receive sensory input and integrate it before commanding voluntary motor response; coordinates other areas of the brain; and carries out higher thought processes, memory, language, speech, and learning. ...
1. 2. a) Explain the compositions of white matter and gray matter
1. 2. a) Explain the compositions of white matter and gray matter

... Roger Sperry received the Nobel Prize in physiology and medicine in 1981 for his experiments on split brain patients that provided strong evidence for lateralization of speech processing in the brain. Sperry's experiments showed, that the left hemisphere is responsible for the formation of speech wh ...
EEG Brain Dynamics
EEG Brain Dynamics

... same size as the others and they were displayed in a horizontal line across the screen. Then, in a randomized order, dots would fill a box and subjects were asked to press a button as quickly as possible preceding the dot. They each had a 76 second block of trials. Thirty segments of the trial were ...
Secrets of the Teen Brain
Secrets of the Teen Brain

... • Tom Sewell, summary of article in Time: May 10, 2004 ...
Improved detection sensitivity in functional MRI data
Improved detection sensitivity in functional MRI data

... Such an optimization problem is efficiently solved using the well-known K-means algorithm in the classification context. After an initialization step that randomly selects k distinct voxels in the volume of interest as the initial cell positions, the criterion is solved using an alternate minimizati ...
What a Frog  s Eye tells the Frog  s brain
What a Frog s Eye tells the Frog s brain

... 1. Local sharp edges and contrast 2. the curvature of edge of a dark contrast 3. the movement of edges 4. the local dimming produced by movement or rapid general darkening  Each group of fibers serving one operation maps the retina continuously in a single sheet of endings in the frog’s brain.  Th ...
SRCD Abstract 01 - University of Illinois Archives
SRCD Abstract 01 - University of Illinois Archives

... designed to capture information from experience and to incorporate the effects of experience into the architecture of the nervous system. This occurs in at least two ways. Experience-expectant brain development takes advantage of information reliably present in the environments of all species member ...
Chapter 8
Chapter 8

... What kind of experiences do young children need to learn? What kind of activities ate best to involve children in? Mabel and Ian wanted their daughter Brianna to learn to read early so they began using flash cards with her when she was two years old. They found that Brianna's skills developed about ...
(Early Period) - Connectionism
(Early Period) - Connectionism

... numbers of units (the analogs of neurons) together with weights that measure the strength of connections between the units. A glance at its history: ● The 1940s: it was pioneered by neurophysiologist Warren McCulloch and Walter Pitts. They noted that neurons are either ‘firing’ electrochemical impul ...
< 1 ... 97 98 99 100 101 102 103 104 105 ... 109 >

Functional magnetic resonance imaging



Functional magnetic resonance imaging or functional MRI (fMRI) is a functional neuroimaging procedure using MRI technology that measures brain activity by detecting associated changes in blood flow. This technique relies on the fact that cerebral blood flow and neuronal activation are coupled. When an area of the brain is in use, blood flow to that region also increases.The primary form of fMRI uses the blood-oxygen-level dependent (BOLD) contrast, discovered by Seiji Ogawa. This is a type of specialized brain and body scan used to map neural activity in the brain or spinal cord of humans or other animals by imaging the change in blood flow (hemodynamic response) related to energy use by brain cells. Since the early 1990s, fMRI has come to dominate brain mapping research because it does not require people to undergo shots, surgery, or to ingest substances, or be exposed to radiation, etc. Other methods of obtaining contrast are arterial spin labeling and diffusion MRI.The procedure is similar to MRI but uses the change in magnetization between oxygen-rich and oxygen-poor blood as its basic measure. This measure is frequently corrupted by noise from various sources and hence statistical procedures are used to extract the underlying signal. The resulting brain activation can be presented graphically by color-coding the strength of activation across the brain or the specific region studied. The technique can localize activity to within millimeters but, using standard techniques, no better than within a window of a few seconds.fMRI is used both in the research world, and to a lesser extent, in the clinical world. It can also be combined and complemented with other measures of brain physiology such as EEG and NIRS. Newer methods which improve both spatial and time resolution are being researched, and these largely use biomarkers other than the BOLD signal. Some companies have developed commercial products such as lie detectors based on fMRI techniques, but the research is not believed to be ripe enough for widespread commercialization.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report