The influence of current direction on phosphene
... (latero-medial and medio-lateral). Each measurement was made 3 times, with a new stimulation site chosen for each repetition. Only those stimulation sites were investigated where phosphenes were restricted to one visual hemifield. Coil positions were stereotactically registered. Functional magnetic ...
... (latero-medial and medio-lateral). Each measurement was made 3 times, with a new stimulation site chosen for each repetition. Only those stimulation sites were investigated where phosphenes were restricted to one visual hemifield. Coil positions were stereotactically registered. Functional magnetic ...
the biological perspective
... Think of the ions inside the cell as a baseball game inside a stadium (the cell walls). The sodium ions outside the cell are all the fans in the area, and they want to get inside to see the game. When the cell is resting (the electrical potential is in a state called the resting potential, because t ...
... Think of the ions inside the cell as a baseball game inside a stadium (the cell walls). The sodium ions outside the cell are all the fans in the area, and they want to get inside to see the game. When the cell is resting (the electrical potential is in a state called the resting potential, because t ...
asgn2a -- NERVOUS SYSTEM - Indiana University Bloomington
... The amount (or strength) of a neuron's activity codes the strength of the signals it gets. A small change in a neuron's activity signals (or codes) a small change in the stimulus that triggers the activity. A large change in activity signals a large change in the stimulus. For example, a neuron in y ...
... The amount (or strength) of a neuron's activity codes the strength of the signals it gets. A small change in a neuron's activity signals (or codes) a small change in the stimulus that triggers the activity. A large change in activity signals a large change in the stimulus. For example, a neuron in y ...
CEREBRAL CORTEX - Global Anatomy Home Page
... In an earlier lecture you learned that there is considerable overlap in function between sensory and motor areas (e.g., for somatic sensation and movement). The distinction between association and sensory-motor areas is similarly blurred. This is exemplified by the secondary sensory and motor areas ...
... In an earlier lecture you learned that there is considerable overlap in function between sensory and motor areas (e.g., for somatic sensation and movement). The distinction between association and sensory-motor areas is similarly blurred. This is exemplified by the secondary sensory and motor areas ...
8129402
... complexes of various innate potentials that are developed one way or another depending upon the training. ...
... complexes of various innate potentials that are developed one way or another depending upon the training. ...
from discrete neuronal ensembles to serial order
... firing strengthens connections, appears to represent only half of the truth and had therefore to be modified. Because co-activation of two neurons strengthens their mutual connections and their alternating activity reduces their influence onto each other, it appears to be the positive or negative co ...
... firing strengthens connections, appears to represent only half of the truth and had therefore to be modified. Because co-activation of two neurons strengthens their mutual connections and their alternating activity reduces their influence onto each other, it appears to be the positive or negative co ...
Neural Substrate Expansion for the Restoration of Brain
... damage is one of the principal objectives of modern translational neuroscience. Electrical stimulation approaches, such as deep-brain stimulation, have achieved the most clinical success, but they ultimately may be limited by the computational capacity of the residual cerebral circuitry. An alternat ...
... damage is one of the principal objectives of modern translational neuroscience. Electrical stimulation approaches, such as deep-brain stimulation, have achieved the most clinical success, but they ultimately may be limited by the computational capacity of the residual cerebral circuitry. An alternat ...
The Brain - Personal
... Lateralization of Cortical Function • Lateralization • Division of labor between hemispheres ...
... Lateralization of Cortical Function • Lateralization • Division of labor between hemispheres ...
Neural Compensations After Lesion of the Cerebral
... B. KOLB, R. BROWN, A. WITT-LAJEUNESSE AND R. GIBB ...
... B. KOLB, R. BROWN, A. WITT-LAJEUNESSE AND R. GIBB ...
Functional Brain Changes Following Cognitive and Motor Skills
... Although several qualitative reviews of studies examining functional brain changes associated with training have been published,2-8 we are aware of only 1 review9 that has used quantitative meta-analytic methods. Previous reviews have revealed both increases and decreases in activity across multiple ...
... Although several qualitative reviews of studies examining functional brain changes associated with training have been published,2-8 we are aware of only 1 review9 that has used quantitative meta-analytic methods. Previous reviews have revealed both increases and decreases in activity across multiple ...
ling411-13 - Rice University
... “If neurons in the functional web are strongly linked, they should show similar response properties in neurophysiological experiments. “If the neurons of the functional web are necessary for the optimal processing of the represented entity, lesion of a significant portion of the network neurons must ...
... “If neurons in the functional web are strongly linked, they should show similar response properties in neurophysiological experiments. “If the neurons of the functional web are necessary for the optimal processing of the represented entity, lesion of a significant portion of the network neurons must ...
fMRI - Rackcdn.com
... multiple areas of the brain take part for a distinct function. Many linguistic and nonlinguistic tasks require neural systems that process auditory or visual sensory information. For example: Word production begins with retrieval of a concept from a store of semantic knowledge (semantic processing), ...
... multiple areas of the brain take part for a distinct function. Many linguistic and nonlinguistic tasks require neural systems that process auditory or visual sensory information. For example: Word production begins with retrieval of a concept from a store of semantic knowledge (semantic processing), ...
The Structure of the Nervous System
... The central nervous system (CNS) consistsof the parts of the nervous systemthat are encasedin bone: the brain and the spinal cord. The brain lies entirely within the skull. A sideview of the rat brain revealsthree parts that are common to all mammals:the cerebrum,the cerebellum,and the brain stem (F ...
... The central nervous system (CNS) consistsof the parts of the nervous systemthat are encasedin bone: the brain and the spinal cord. The brain lies entirely within the skull. A sideview of the rat brain revealsthree parts that are common to all mammals:the cerebrum,the cerebellum,and the brain stem (F ...
- Wiley Online Library
... function may be designated as cortical reorganization or plasticity, and this anatomic relocation must be differentiated from the displacement of the anatomic structure caused by the space-occupying lesion that can simulate a relocation of function. Cerebral reorganization (plasticity) is defined as ...
... function may be designated as cortical reorganization or plasticity, and this anatomic relocation must be differentiated from the displacement of the anatomic structure caused by the space-occupying lesion that can simulate a relocation of function. Cerebral reorganization (plasticity) is defined as ...
Single nucleotide polymorphism in the neuroplastin locus
... effects in the left and right hemispheres indicate that these values are higher for the left hemisphere, suggesting that the languagedominant left cerebral cortex may be under stronger genetic control than the right cortex.8 Second, age-related differences in the heritability of cortical thickness i ...
... effects in the left and right hemispheres indicate that these values are higher for the left hemisphere, suggesting that the languagedominant left cerebral cortex may be under stronger genetic control than the right cortex.8 Second, age-related differences in the heritability of cortical thickness i ...
The Primary Brain Vesicles Revisited: Are the Three
... 2000]. According to that study, the rhombencephalic region differentiated much earlier than any other brain region, and the early neural tube exhibited a faint constriction at the pros/mesencephalic boundary and a distinct rhombomere (r3) at stage I (19-day or 3.5-mm embryos) (fig. 2b). The brain at ...
... 2000]. According to that study, the rhombencephalic region differentiated much earlier than any other brain region, and the early neural tube exhibited a faint constriction at the pros/mesencephalic boundary and a distinct rhombomere (r3) at stage I (19-day or 3.5-mm embryos) (fig. 2b). The brain at ...
The Nervous System
... Brain Specialization Splitting the brain • Cerebral hemispheres are not identical • E.g., left hemisphere more involved in language • Information comes from study of split-brain patients – Individuals whose corpus callosum has been cut to treat severe epilepsy Copyright © Allyn & Bacon 2004 ...
... Brain Specialization Splitting the brain • Cerebral hemispheres are not identical • E.g., left hemisphere more involved in language • Information comes from study of split-brain patients – Individuals whose corpus callosum has been cut to treat severe epilepsy Copyright © Allyn & Bacon 2004 ...
The Nervous System
... At this very moment, your own brain, assisted by other parts of your nervous system, is busily taking in these words. Whether you are excited, curious, or bored, your brain is registering some sort of emotional reaction. As you continue reading, your brain will (we hope) store away much of the infor ...
... At this very moment, your own brain, assisted by other parts of your nervous system, is busily taking in these words. Whether you are excited, curious, or bored, your brain is registering some sort of emotional reaction. As you continue reading, your brain will (we hope) store away much of the infor ...
brain anatomy - Sinoe Medical Association
... •Is defined as one of the two regions of the brain that are delineated by the body's median plane. •The brain can thus be described as being divided into left and right cerebral hemispheres. Each of these hemispheres has an outer layer of grey matter called the cerebral cortex that is supported by a ...
... •Is defined as one of the two regions of the brain that are delineated by the body's median plane. •The brain can thus be described as being divided into left and right cerebral hemispheres. Each of these hemispheres has an outer layer of grey matter called the cerebral cortex that is supported by a ...
Laboratory Guide - Sites@Duke
... Lateral aspect of the brain. The cerebral hemispheres are relatively large in humans. They are entirely covered by a 2–3-mm thick layer of cells and cellular processes called the cerebral cortex. The surface of each hemisphere is highly infolded; the ridges thus formed are known as gyri (singular: g ...
... Lateral aspect of the brain. The cerebral hemispheres are relatively large in humans. They are entirely covered by a 2–3-mm thick layer of cells and cellular processes called the cerebral cortex. The surface of each hemisphere is highly infolded; the ridges thus formed are known as gyri (singular: g ...
Lateralization of brain function
The longitudinal fissure separates the human brain into two distinct cerebral hemispheres, connected by the corpus callosum. The hemispheres exhibit strong, but not complete, bilateral symmetry in both structure and function. For example, structurally, the lateral sulcus generally is longer in the left hemisphere than in the right hemisphere, and functionally, Broca's area and Wernicke's area are located in the left cerebral hemisphere for about 95% of right-handers, but about 70% of left-handers.Broad generalizations are often made in ""pop"" psychology about one side or the other having characteristic labels, such as ""logical"" for the left side or ""creative"" for the right. These labels are not supported by studies on lateralization, as lateralization does not add specialized usage from either hemisphere. Both hemispheres contribute to both kinds of processes, and experimental evidence provides little support for correlating the structural differences between the sides with such broadly defined functional differences.The extent of any modularity, or specialization of brain function by area, remains under investigation. If a specific region of the brain, or even an entire hemisphere, is injured or destroyed, its functions can sometimes be assumed by a neighboring region in the same hemisphere or the corresponding region in the other hemisphere, depending upon the area damaged and the patient's age. When injury interferes with pathways from one area to another, alternative (indirect) connections may develop to communicate information with detached areas, despite the inefficiencies.Brain function lateralization is evident in the phenomena of right- or left-handedness and of right or left ear preference, but a person's preferred hand is not a clear indication of the location of brain function. Although 95% of right-handed people have left-hemisphere dominance for language, 18.8% of left-handed people have right-hemisphere dominance for language function. Additionally, 19.8% of the left-handed have bilateral language functions. Even within various language functions (e.g., semantics, syntax, prosody), degree (and even hemisphere) of dominance may differ.Additionally, although some functions are lateralized, these are only a tendency. The trend across many individuals may also vary significantly as to how any specific function is implemented. The areas of exploration of this causal or effectual difference of a particular brain function include its gross anatomy, dendritic structure, and neurotransmitter distribution. The structural and chemical variance of a particular brain function, between the two hemispheres of one brain or between the same hemisphere of two different brains, is still being studied. Short of having undergone a hemispherectomy (removal of a cerebral hemisphere), no one is a ""left-brain only"" or ""right-brain only"" person.