scholarly journals On the brains of two sub-fossil malagasy lemuroids

1898 ◽  
Vol 62 (379-387) ◽  
pp. 46-50 ◽  
Keyword(s):  
General Idea ◽  
Zoological Society ◽  
The Brain

The casts here described and figured have been moulded from the brain-cavities of the skulls of two sub-fossil Lemuroids from Madagascar, the descriptions of which I have already published. For comparison with the brains of living Lemuroids the figures published by P. Gervais are the best adapted for the present purpose, since they, too, are drawn from moulds of the brain cavity, and give on one plate a good general idea of the variations of the Lemur brain. 1. Globilemur Flacourti , Maj. The larger of the two casts was taken from the skull briefly described by me at the meeting of the Zoological Society of London, June 20, 1893.

scholarly journals Stability and flexibility in multisensory sampling: insights from perceptual illusions

2019 ◽  
Vol 121 (5) ◽  
pp. 1588-1590 ◽  
Author(s):  
Luca Casartelli
Keyword(s):  
Temporal Dynamics ◽  
Multisensory Processing ◽  
General Idea ◽  
Perceptual Illusions ◽  
The Brain ◽  
Multisensory Processes

Neural, oscillatory, and computational counterparts of multisensory processing remain a crucial challenge for neuroscientists. Converging evidence underlines a certain efficiency in balancing stability and flexibility of sensory sampling, supporting the general idea that multiple parallel and hierarchically organized processing stages in the brain contribute to our understanding of the (sensory/perceptual) world. Intriguingly, how temporal dynamics impact and modulate multisensory processes in our brain can be investigated benefiting from studies on perceptual illusions.

scholarly journals MIND MAP DALAM PENGAJARAN KETERAMPILAN MENULIS DAN MEMBACA

Diksi ◽  
2015 ◽  
Vol 12 (2) ◽  
Author(s):  
Iman Santoso
Keyword(s):  
Reading Skills ◽  
Writing Skills ◽  
Main Idea ◽  
General Idea ◽  
Graphic Organizer ◽  
Advance Organizer ◽  
Graphic Form ◽  
The Right ◽  
Reading Activity ◽  
The Brain

A mind map is a graphic form showing how related ideasare organized. Useful as a graphic organizer of ideas, it is a conceptmap made on the basis of the principles of how the brain works, thatis, through association and imagination, simultaneously maximizingthe function of the right and left hemispheres of the brain. Its essenceis that the main idea is placed in the middle and then, regarded asits center, it is then connected with lines to supporting ideas havingcertain associations with it.A mind map can be used to help develop skills in writing andreading texts written in such a language as German. In developinglearners’ writing skills, it is to be employed before they write acomposition, functioning in this case as a tool for organizing ideasand seeing relations between them and also as guidance in writing acomposition. In developing reading skills, it can be employed in thepre-reading phase as an advance organizer enabling readers to havea general idea of the contents of the text. It can also be employedafter the reading activity to help give readers training in organizingthe information in the text.Keywords: mind map, writing and reading skills

Dopamine and extraversion: Differential responsivity may be the key

1999 ◽  
Vol 22 (3) ◽  
pp. 535-536 ◽  
Author(s):  
Thomas H. Rammsayer
Keyword(s):  
Functional Relationship ◽  
Incentive Motivation ◽  
Biological Model ◽  
General Idea ◽  
Related Characteristic ◽  
The Brain ◽  
Existing Data

Depue & Collins's general idea of a functional relationship between DA activity and extraversion is an important step toward an integrative biological model of personality. However, focusing primarily on incentive motivation and variations in VTA DA activity as basic behavioral and biological components underlying extraversion appears too limited. Existing data suggest that responsivity to changes in DA activity is higher in introverts than in extraverts. This may reflect a general, extraversion- related characteristic of the entire dopaminergic network in the brain.

Coordination of the reproductive processes

1971 ◽  
Vol 3 (S3) ◽  
pp. 5-12
Author(s):  
G. W. Harris
Keyword(s):  
Title I ◽  
Reproductive Tract ◽  
Secretory Activity ◽  
Mammary Glands ◽  
General Idea ◽  
Basal Region ◽  
Small Vessels ◽  
Nerve Tracts ◽  
Reproductive Processes ◽  
The Brain

The title I have been asked to discuss is the Coordination' of Reproductive Processes and this implies that there are many structures and functions to be coordinated. Text-fig. 1 gives a general idea of what these structures and functions are. The basal region of the brain, known as the hypothalamus, is played upon by many stimuli from the external environment acting through different nerve tracts. The hypothalamus in turn regulates, through a system of small vessels, the secretory activity of the anterior pituitary gland, which for the purposes of reproduction secretes two or three gonadotrophic hormones into the bloodstream. These hormones are very largely, if not entirely, responsible for maintaining the activity of the ovary and the testis, and for varying and regulating the processes going on in the gonad. The gonad in turn secretes into the bloodstream simpler steroid hormones, which act upon the reproductive tract and the mammary glands.

scholarly journals BRAIN CONNECTIONS ANALYSIS USING GRAPH THEORY MEASURES

2019 ◽  
Vol 2 ◽  
pp. 94
Author(s):  
Oļesja Minejeva ◽  
Zigurds Markovics ◽  
Nauris Zdanovskis
Keyword(s):  
Complex Structure ◽  
Brain Regions ◽  
The Body ◽  
Virtual Space ◽  
General Idea ◽  
Node Degree ◽  
Structural Description ◽  
The Brain ◽  
Brain Connections

Brain is a part of the organism’s complex structure that performs many functions, which are responsible for the main human abilities: to talk, to hear, to move, to see, etc. The brain consists of several areas that are not only directly connected with the different body systems, but also depend and may affect each other. Researchers and doctors are trying to summarize and visualize these relationships for an important purpose – to get the information about possible reactions of the body in case of various diseases, possibilities of recovery, risks, etc. important issues. Neurologists are looking for ways to "move" through the brain in virtual space for viewing the synapses between different areas. It might be useful to get a general idea of how brain regions are interrelated. The term "connectome", which is the complete structural description of the brain connections, or the map of connections, is used for the common perception of brain relationships. Connectome is a network of thousands of nerve fibres that transmits signals between the special regions responsible for functions such as vision, hearing, movement and memory, and combines these functions in a system that perceives, decides and acts as a whole. So, the relationships of brain neural regions can be represented as a graph with vertices corresponding to specific areas, but edges are links between these areas. This graph can be analysed using quantitative measures, like node degree, centrality, modularity etc. This article discusses the different network measures for the connections between brain's regions. The purpose is to determine the most important areas and the role of individual connections in the general functional brain model.

Preliminary note upon the cell lamination of the cerebral cortex of echidna, with an enumeration of the fibres in the cranial nerves

1910 ◽  
Vol 82 (553) ◽  
pp. 113-123 ◽  
Keyword(s):  
Cerebral Cortex ◽  
Cranial Nerves ◽  
Preliminary Note ◽  
Zoological Society ◽  
The Brain

Material .—The following notes are based on the study of the brain of an Echidna which died in the gardens of the Zoological Society in London. Dr. F. W. Mott, F. R. S., kindly placed the brain in my hands with the suggestion that I should examine the cell lamination of the cortex and should estimate the numbers of fibres in the cranial nerves. For this and for his advice and help during the investigation I wish here to express my gratitude.

Solar Internal Rotation and Dynamo Waves: A Two-Dimensional Asymptotic Solution in the Convection Zone

2000 ◽  
Vol 179 ◽  
pp. 379-380
Author(s):  
Gaetano Belvedere ◽  
Kirill Kuzanyan ◽  
Dmitry Sokoloff
Keyword(s):  
Magnetic Field ◽  
Asymptotic Solution ◽  
Internal Rotation ◽  
Convection Zone ◽  
General Idea ◽  
Dynamo Model ◽  
Axially Symmetric ◽  
Dynamo Action ◽  
Regeneration Rate ◽  
Dynamo Waves

Extended abstractHere we outline how asymptotic models may contribute to the investigation of mean field dynamos applied to the solar convective zone. We calculate here a spatial 2-D structure of the mean magnetic field, adopting real profiles of the solar internal rotation (the Ω-effect) and an extended prescription of the turbulent α-effect. In our model assumptions we do not prescribe any meridional flow that might seriously affect the resulting generated magnetic fields. We do not assume apriori any region or layer as a preferred site for the dynamo action (such as the overshoot zone), but the location of the α- and Ω-effects results in the propagation of dynamo waves deep in the convection zone. We consider an axially symmetric magnetic field dynamo model in a differentially rotating spherical shell. The main assumption, when using asymptotic WKB methods, is that the absolute value of the dynamo number (regeneration rate) |D| is large, i.e., the spatial scale of the solution is small. Following the general idea of an asymptotic solution for dynamo waves (e.g., Kuzanyan & Sokoloff 1995), we search for a solution in the form of a power series with respect to the small parameter |D|–1/3(short wavelength scale). This solution is of the order of magnitude of exp(i|D|1/3S), where S is a scalar function of position.

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