scholarly journals Lateralization correlates with individual differences in inhibitory control in zebrafish

2020 ◽  
Vol 16 (8) ◽  
pp. 20200296
Author(s):  
Tyrone Lucon-Xiccato ◽  
Giulia Montalbano ◽  
Marco Dadda ◽  
Cristiano Bertolucci
Keyword(s):  
Inhibitory Control ◽  
Cognitive Differences ◽  
Cerebral Lateralization ◽  
Brain Hemisphere ◽  
Selective Pressures ◽  
Individual Fitness ◽  
Left Brain ◽  
Selection For ◽  
The Right ◽  
Selection Mechanisms

Individual fitness often depends on the ability to inhibit behaviours not adapted to a given situation. However, inhibitory control can vary greatly between individuals of the same species. We investigated a mechanism that might maintain this variability in zebrafish ( Danio rerio ). We demonstrate that inhibitory control correlates with cerebral lateralization, the tendency to process information with one brain hemisphere or the other. Individuals that preferentially observed a social stimulus with the right eye and thus processed social information with the left brain hemisphere, inhibited foraging behaviour more efficiently. Therefore, selective pressures that maintain lateralization variability in populations might provide indirect selection for variability in inhibitory control. Our study suggests that individual cognitive differences may result from complex multi-trait selection mechanisms.

Orientation and lateralized cue use in pigeons navigating a large indoor environment

2002 ◽  
Vol 205 (12) ◽  
pp. 1795-1805 ◽  
Author(s):  
Helmut Prior ◽  
Frank Lingenauber ◽  
Jörg Nitschke ◽  
Onur Güntürkün
Keyword(s):  
Reference Frame ◽  
Brain Lateralization ◽  
Spatial Cues ◽  
Brain Hemisphere ◽  
Brain Hemispheres ◽  
Left Brain ◽  
Right Brain ◽  
Starting Location ◽  
The Right ◽  
Global Reference Frame

SUMMARY The pigeon's use of different visuo-spatial cues was studied under controlled laboratory conditions that simulated analogous aspects of a homing situation. The birds first learned the route to a goal that was not visible from the starting location, but became visible as it was approached. Birds could orientate within a mainly geometric global reference frame, using prominent landmarks within their range, or by `piloting' along local cues. After learning the route, the birds were tested from familiar and unfamiliar release points, and several aspects of the available cues were varied systematically. The study explored the contribution of the left and right brain hemispheres by performing tests with the right or left eye occluded. The results show that pigeons can establish accurate bearings towards a non-visible goal by using a global reference frame only. Furthermore, there was a peak of searching activity at the location predicted by the global reference frame. Search at this location and directedness of the bearings were equally high with both right and left eye, suggesting that both brain hemispheres have the same competence level for these components of the task. A lateralization effect occurred when prominent landmarks were removed or translated. While the right brain hemisphere completely ignored such changes,the left brain hemisphere was distracted by removal of landmarks. After translation of landmarks, the left but not the right brain hemisphere allocated part of the searching activity to the site predicted by the new landmark position. The results show that a mainly geometric global visual reference frame is sufficient to determine exact bearings from familiar and unfamiliar release points. Overall, the results suggest a model of brain lateralization with a well-developed global spatial reference system in either hemisphere and an extra capacity for the processing of object features in the left brain.

Bridging the Gap Between Solution-Focused Brief Therapy and Interpersonal Neurobiology: A Combined Approach for Counseling Families

2020 ◽  
Vol 39 (3) ◽  
pp. 1-14
Author(s):  
Emily Corbin ◽  
Aaron M. Norton
Keyword(s):  
Positive Emotions ◽  
Brief Therapy ◽  
Therapeutic Process ◽  
Interpersonal Neurobiology ◽  
Brain Hemisphere ◽  
Left Brain ◽  
Solution Focused Brief Therapy ◽  
The Right ◽  
Solution Focused ◽  
The Brain

This article proposes a comprehensive counseling approach by integrating techniques from solution-focused brief therapy and interpersonal neurobiology. This approach allows counselors to intentionally utilize both hemispheres of the brain during the therapeutic process—anchoring the techniques of solution-focused brief therapy in the left-brain hemisphere while connecting to the client through the right-brain hemisphere. This combined method incorporates five key principles: the therapeutic relationship, co-construction of reality, use of questions, a focus on solutions, and emphasis on positive emotions.

scholarly journals Development of lateralization of the magnetic compass in a migratory bird

2012 ◽  
Vol 279 (1745) ◽  
pp. 4230-4235 ◽  
Author(s):  
Dennis Gehring ◽  
Wolfgang Wiltschko ◽  
Onur Güntürkün ◽  
Susanne Denzau ◽  
Roswitha Wiltschko
Keyword(s):  
Geomagnetic Field ◽  
Migratory Bird ◽  
Magnetic Compass ◽  
The Other ◽  
Maturation Process ◽  
Erithacus Rubecula ◽  
European Robin ◽  
Brain Hemisphere ◽  
Left Brain ◽  
The Right

The magnetic compass of a migratory bird, the European robin ( Erithacus rubecula ), was shown to be lateralized in favour of the right eye/left brain hemisphere. However, this seems to be a property of the avian magnetic compass that is not present from the beginning, but develops only as the birds grow older. During first migration in autumn, juvenile robins can orient by their magnetic compass with their right as well as with their left eye. In the following spring, however, the magnetic compass is already lateralized, but this lateralization is still flexible: it could be removed by covering the right eye for 6 h. During the following autumn migration, the lateralization becomes more strongly fixed, with a 6 h occlusion of the right eye no longer having an effect. This change from a bilateral to a lateralized magnetic compass appears to be a maturation process, the first such case known so far in birds. Because both eyes mediate identical information about the geomagnetic field, brain asymmetry for the magnetic compass could increase efficiency by setting the other hemisphere free for other processes.

scholarly journals Lateralization of magnetic compass orientation in pigeons

2010 ◽  
Vol 7 (suppl_2) ◽  
Author(s):  
Christiane Wilzeck ◽  
Wolfgang Wiltschko ◽  
Onur Güntürkün ◽  
Roswitha Wiltschko ◽  
Helmut Prior
Keyword(s):  
Operant Chamber ◽  
Magnetic Compass ◽  
Compass Orientation ◽  
Brain Hemisphere ◽  
Brain Hemispheres ◽  
Left Brain ◽  
Right Brain ◽  
Magnetic Compass Orientation ◽  
Operant Task ◽  
The Right

The aim of our study was to test for lateralization of magnetic compass orientation in pigeons. Having shown that pigeons are capable of learning magnetic compass directions in an operant task, we wanted to know whether the brain hemispheres contribute differently and how the lateralization pattern relates to findings in other avian species. Birds that had learnt to locate food in an operant chamber by means of magnetic directions were tested for lateralization of magnetic compass orientation by temporarily covering one eye. Successful orientation occurred under all conditions of viewing. Thus, pigeons can perceive and process magnetic compass directions with the right eye and left brain hemisphere as well as the left eye and right brain hemisphere. However, while the right brain hemisphere tended to confuse the learned direction with its opposite (axial response), the left brain hemisphere specifically preferred the correct direction. Our findings demonstrate bilateral processing of magnetic information, but also suggest qualitative differences in how the left and the right brain deal with magnetic cues.

Clinical picture of decompensated aphasias due to posterior localization of the lesion of the left brain hemisphere

2019 ◽  
Vol 17 (7) ◽  
pp. 138-142
Author(s):  
M. M. Shcherbakova ◽  
◽  
S. V. Kotov ◽  
Keyword(s):  
Clinical Picture ◽  
Brain Hemisphere ◽  
Left Brain

scholarly journals Effects of tDCS during inhibitory control training on performance and PTSD, aggression and anxiety symptoms: a randomized-controlled trial in a military sample

2021 ◽  
pp. 1-11
Author(s):  
Fenne M. Smits ◽  
Elbert Geuze ◽  
Dennis J. L. G. Schutter ◽  
Jack van Honk ◽  
Thomas E. Gladwin
Keyword(s):  
Randomized Controlled Trial ◽  
Inhibitory Control ◽  
Response Inhibition ◽  
Clinical Sample ◽  
Controlled Trial ◽  
Anodal Tdcs ◽  
Randomized Controlled ◽  
Impulsive Aggression ◽  
The Right ◽  
Inhibition Training

Abstract Background Post-traumatic stress disorder (PTSD), anxiety, and impulsive aggression are linked to transdiagnostic neurocognitive deficits. This includes impaired inhibitory control over inappropriate responses. Prior studies showed that inhibitory control can be improved by modulating the right inferior frontal gyrus (IFG) with transcranial direct current stimulation (tDCS) in combination with inhibitory control training. However, its clinical potential remains unclear. We therefore aimed to replicate a tDCS-enhanced inhibitory control training in a clinical sample and test whether this reduces stress-related mental health symptoms. Methods In a preregistered double-blind randomized-controlled trial, 100 active-duty military personnel and post-active veterans with PTSD, anxiety, or impulsive aggression symptoms underwent a 5-session intervention where a stop-signal response inhibition training was combined with anodal tDCS over the right IFG for 20 min at 1.25 mA. Inhibitory control was evaluated with the emotional go/no-go task and implicit association test. Stress-related symptoms were assessed by self-report at baseline, post-intervention, and after 3-months and 1-year follow-ups. Results Active relative to sham tDCS neither influenced performance during inhibitory control training nor on assessment tasks, and did also not significantly influence self-reported symptoms of PTSD, anxiety, impulsive aggression, or depression at post-assessment or follow-up. Conclusions Our results do not support the idea that anodal tDCS over the right IFG at 1.25 mA enhances response inhibition training in a clinical sample, or that this tDCS-training combination can reduce stress-related symptoms. Applying different tDCS parameters or combining tDCS with more challenging tasks might provide better conditions to modulate cognitive functioning and stress-related symptoms.

scholarly journals Null Effect of Transcranial Static Magnetic Field Stimulation over the Dorsolateral Prefrontal Cortex on Behavioral Performance in a Go/NoGo Task

2021 ◽  
Vol 11 (4) ◽  
pp. 483
Author(s):  
Tatsunori Watanabe ◽  
Nami Kubo ◽  
Xiaoxiao Chen ◽  
Keisuke Yunoki ◽  
Takuya Matsumoto ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Prefrontal Cortex ◽  
Inhibitory Control ◽  
Static Magnetic Field ◽  
Dorsolateral Prefrontal Cortex ◽  
Cortical Excitability ◽  
Control Function ◽  
Field Stimulation ◽  
Dorsolateral Prefrontal ◽  
The Right

The purpose of this pilot study was to investigate whether transcranial static magnetic field stimulation (tSMS), which can modulate cortical excitability, would influence inhibitory control function when applied over the dorsolateral prefrontal cortex (DLPFC). Young healthy adults (n = 8, mean age ± SD = 24.4 ± 4.1, six females) received the following stimulations for 30 min on different days: (1) tSMS over the left DLPFC, (2) tSMS over the right DLPFC, and (3) sham stimulation over either the left or right DLPFC. The participants performed a Go/NoGo task before, immediately after, and 10 min after the stimulation. They were instructed to extend the right wrist in response to target stimuli. We recorded the electromyogram from the right wrist extensor muscles and analyzed erroneous responses (false alarm and missed target detection) and reaction times. As a result, 50% of the participants made erroneous responses, and there were five erroneous responses in total (0.003%). A series of statistical analyses revealed that tSMS did not affect the reaction time. These preliminary findings suggest the possibility that tSMS over the DLPFC is incapable of modulating inhibitory control and/or that the cognitive load imposed in this study was insufficient to detect the effect.

Neuropsychological Assessment of a Case of Early Right Hemiplegia: Qualitative and Quantitative Analysis

1984 ◽  
Vol 59 (3) ◽  
pp. 1007-1010 ◽  
Author(s):  
Daniela Brizzolara ◽  
Anna Maria Chilosi ◽  
Gianni Luigi De Nobili ◽  
Giovanni Ferretti
Keyword(s):  
Quantitative Analysis ◽  
Neuropsychological Assessment ◽  
Normal Development ◽  
Right Hemisphere ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Perceptual Skills ◽  
Left Brain ◽  
Linguistic Functions ◽  
The Right

Evidence for normal development of linguistic but poor visuo-perceptual skills has been obtained with the neuropsychological assessment of a case of early left-brain injury. Data suggest the transfer of linguistic functions from the left to the right hemisphere at the expense of visuo-perceptual capacities for which the right hemisphere is potentially specialized.

Teaching Drawing as a Code or Diagram—Mirror or Map—, and Its Correlation with the Right or Left Brain Hemispheres

2017 ◽  
pp. 555-563
Author(s):  
Aurelio Vallespín Muniesa ◽  
Noelia Cervero Sánchez ◽  
Victoria González Gómez
Keyword(s):  
Brain Hemispheres ◽  
Left Brain ◽  
The Right

scholarly journals Penis size and sperm quality, are all bats grey in the dark?

2018 ◽  
Vol 65 (6) ◽  
pp. 697-703 ◽  
Author(s):  
Nicolas Jean Fasel ◽  
Marta Kołodziej-Sobocińska ◽  
Ewa Komar ◽  
Marcin Zegarek ◽  
Ireneusz Ruczyński
Keyword(s):  
Sperm Quality ◽  
Copulatory Behavior ◽  
Scaling Relations ◽  
Head Width ◽  
Sperm Velocity ◽  
Selective Pressures ◽  
Penis Size ◽  
Penis Length ◽  
Selection For ◽  
Myotis Nattereri

Abstract Penises play a key role in sperm transport and in stimulating female genitals. This should impact post-copulatory competition, and expose penis characteristics to sexual selective pressures. Studies of male genitalia have repeatedly reported negative static allometries, which mean that, within species, large males have disproportionally small genitals when compared with smaller individuals. Males of some sperm-storing bat species may stand as an exception to such a pattern by arousing from hibernation to copulate with torpid females. The selection for large penises might take place, if a long organ provides advantages during post-copulatory competition and/or if females have evolved mechanisms allowing the choice of sire, relying on characters other than pre-copulatory traits (e.g., penis size). In this study, we measured dimensions of the erected penis in 4 sperm-storing bat species. Furthermore, we collected sperm and evaluated the link between penis dimensions and sperm velocity. Our results revealed steep allometric slopes of the erected penis length in Barbastella barbastellus and an inverse allometry of penis head width in Myotis nattereri. More detailed studies of copulatory behavior are urgently needed to explain the range of observed scaling relations. Furthermore, penis head width correlates with sperm velocity in Plecotus auritus. For this last species, we propose that penis shape might act as a marker of male fertility.

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