Symmetry and asymmetry in the human brain

Hugdahl, Kenneth

doi:10.1017/s1062798705000700

Cited by 84 publications

(69 citation statements)

References 15 publications

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“…19,20 Functional asymmetry is a manifestation of the dominance of one of the brain hemispheres. The dominance mirrors the development of the nervous system, from simply symmetrical to more complex; then finally a coordinated and specialized system of symmetry.…”

mentioning

confidence: 99%

Female and male orbit asymmetry: Digital analysis

Lepich¹,

Dąbek²,

Witkowska³

et al. 2017

Adv Clin Exp Med

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mentioning

confidence: 99%

Female and male orbit asymmetry: Digital analysis

Lepich¹,

Dąbek²,

Witkowska³

et al. 2017

Adv Clin Exp Med

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“…These results were explained on the basis of the functional features of the two human cerebral hemispheres, which, despite being anatomically approximately symmetrical, are functionally specialized and lateralized with regards to a number of different cognitive processes. According to the most common interpretation of this phenomenon, hemispheric specialization can be reduced to two patterns-one linguistic, the other visual-spatial (Hugdahl, 2000;2005;Jancke and Steinmetz, 2004). In particular, in righthanded individuals, the left hemisphere is thought to be specialized in processing verbal stimuli, whereas the right hemisphere essentially deals with non-verbal stimuli.…”

Section: Discussionmentioning

confidence: 99%

Is Color Perception of Packages Affected by Their In-aisle Position?

Porcheddu¹,

Pugliatti²,

Pinna³

2012

American Journal of Economics and Business Administration

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The retail environment is characterized by numerous competing stimuli vying for the consumer's attention. Products packages feature both verbal and nonverbal elements. Nonverbal stimuli, like package colors, seem to be particularly relevant for perception. Knowing whether there is preferential positioning of colored items on the shelves is fundamental for retailers. In addition, some colors may be better perceived than others. The purpose of this study was to investigate whether the color perception of packages in a supermarket is affected by their in-aisle position and by their color type. In a lab setting, 120 right-handed subjects were asked to look at 3 series of images on a screen. Images showed a virtual supermarket aisle. The aisle had two identical opposite gondolas, each containing the same number of items of same size and shape. In each image, apart from one single colored item, all other items were gray. In each series, the colored item was always of the same primary color (blue, red or green) and it was displayed an equal number of times on the right and on the left. For each image, subjects were asked to locate the colored item as quickly as possible. Accuracy and response time of answers were recorded. Colored items were perceived more accurately and rapidly when they were displayed on the left gondola to the observer. This phenomenon was specifically color-dependent, as red and blue items were better perceived than green ones. Our results support the hypothesis of an asymmetric perception of colored items in the aisle. Retailers should consider that the consumer's perception of colored package is more accurate and fast when the items are positioned on the left gondola. They should also consider that some colors may be more effective than others in catching customers' attention.

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“…One frequently used method to study language asymmetry is dichotic listening. Because of its ability to distinguish which hemisphere processes-specific sounds, the use of dichotic listening has become widespread in studies of brain asymmetry [2], [4].…”

Section: Dichotic Listeningmentioning

confidence: 99%

“…Dichotic listening means presenting two auditory stimuli simultaneously, one in each ear, and the standard experiment requires that the subject report which of the two stimuli was perceived best [2].…”

Section: Introductionmentioning

confidence: 99%

Entropy in Dichotic Listening EEEG Recordings

Vahaplar

Çelikoğlu

Özgören

2011

MCA

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The dichotic listening (DL) paradigm has an important role in brain asymmetry studies at the behavioral level. In dichotic listening, the subjects are alerted by diotic or dichotic stimuli which are meaningless, consonant vowel syllables on both ears. The subjects then presented the syllable they heard through a 6 button keypad. During this procedure, the EEG signals of the subjects were recorded by a 64 channel cap. Entropy is a measure of complexity or disorder in a signal. In other words, it is a measure of uncertainty of information in a statistical description of a system. The Shannon entropy gives a useful criterion for analyzing and comparing probability distribution, it provides a measure of the information of any distribution. In this study, the EEG recordings are examined by their entropy values. Different entropy measures are compared for different time intervals. EEG data and dichotic listening paradigm are evaluated in terms of entropy changes. The effects of ear advantage and auditory stimuli are investigated on entropy.

show abstract

Symmetry and asymmetry in the human brain

Cited by 84 publications

References 15 publications

Female and male orbit asymmetry: Digital analysis

Female and male orbit asymmetry: Digital analysis

Is Color Perception of Packages Affected by Their In-aisle Position?

Entropy in Dichotic Listening EEEG Recordings

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