Search Results - (Author, Cooperation:G. E. Robinson)
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1Latest Papers from Table of Contents or Articles in PressZ. S. Liang ; T. Nguyen ; H. R. Mattila ; S. L. Rodriguez-Zas ; T. D. Seeley ; G. E. Robinson
American Association for the Advancement of Science (AAAS)
Published 2012Staff ViewPublication Date: 2012-03-10Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; *Appetitive Behavior ; Bees/*genetics/*physiology ; Behavior, Animal ; Brain/metabolism ; Catecholamines/metabolism ; Dopamine Antagonists/pharmacology ; *Exploratory Behavior ; Female ; Gene Expression Profiling ; Gene Expression Regulation ; Genes, Insect ; Glutamic Acid/metabolism ; Male ; Membrane Transport Proteins/genetics/metabolism ; Nesting Behavior ; Octopamine/pharmacology ; Oligonucleotide Array Sequence Analysis ; Receptors, Neurotransmitter/genetics ; Signal Transduction/genetics ; Sodium Glutamate/pharmacokinetics ; Transcriptome ; gamma-Aminobutyric Acid/metabolismPublished by: -
2Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2015-12-15Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Arvicolinae/*psychology ; Brain/*metabolism ; Female ; Male ; Receptors, Vasopressin/*metabolism ; Sexual Behavior/*physiology ; Sexual Behavior, Animal/*physiology ; *Social Behavior ; Spatial Memory/*physiologyPublished by: -
3Latest Papers from Table of Contents or Articles in PressK. M. Kapheim ; H. Pan ; C. Li ; S. L. Salzberg ; D. Puiu ; T. Magoc ; H. M. Robertson ; M. E. Hudson ; A. Venkat ; B. J. Fischman ; A. Hernandez ; M. Yandell ; D. Ence ; C. Holt ; G. D. Yocum ; W. P. Kemp ; J. Bosch ; R. M. Waterhouse ; E. M. Zdobnov ; E. Stolle ; F. B. Kraus ; S. Helbing ; R. F. Moritz ; K. M. Glastad ; B. G. Hunt ; M. A. Goodisman ; F. Hauser ; C. J. Grimmelikhuijzen ; D. G. Pinheiro ; F. M. Nunes ; M. P. Soares ; E. D. Tanaka ; Z. L. Simoes ; K. Hartfelder ; J. D. Evans ; S. M. Barribeau ; R. M. Johnson ; J. H. Massey ; B. R. Southey ; M. Hasselmann ; D. Hamacher ; M. Biewer ; C. F. Kent ; A. Zayed ; C. Blatti, 3rd ; S. Sinha ; J. S. Johnston ; S. J. Hanrahan ; S. D. Kocher ; J. Wang ; G. E. Robinson ; G. Zhang
American Association for the Advancement of Science (AAAS)
Published 2015Staff ViewPublication Date: 2015-05-16Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Amino-Acid N-Acetyltransferase ; Animals ; Bees/classification/*genetics ; DNA Transposable Elements ; *Evolution, Molecular ; Gene Expression Regulation ; Gene Regulatory Networks ; *Genetic Drift ; Genome, Insect/genetics ; Phylogeny ; Selection, Genetic ; *Social Behavior ; Transcription Factors/chemistry/genetics ; *TranscriptomePublished by: -
4Latest Papers from Table of Contents or Articles in PressJ. E. Strassmann ; R. E. Page, Jr. ; G. E. Robinson ; T. D. Seeley
Nature Publishing Group (NPG)
Published 2011Staff ViewPublication Date: 2011-03-25Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Altruism ; Animals ; Biological Evolution ; Cooperative Behavior ; Female ; Game Theory ; Genetic Fitness ; Genetics, Population ; Genomic Imprinting ; *Heredity ; Humans ; Male ; *Models, Biological ; Reproducibility of Results ; *Selection, Genetic ; Sex RatioPublished by: -
5Latest Papers from Table of Contents or Articles in PressA. M. Bell ; G. E. Robinson
American Association for the Advancement of Science (AAAS)
Published 2011Staff ViewPublication Date: 2011-06-04Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: *Adaptation, Biological ; Animals ; Bees/genetics/physiology ; Beetles/genetics/physiology ; *Behavior, Animal ; *Biological Evolution ; Female ; Gene Expression Profiling ; *Gene Expression Regulation ; Genetic Variation ; *Genome ; Male ; Phenotype ; Smegmamorpha/genetics/physiologyPublished by: -
6Latest Papers from Table of Contents or Articles in PressG. E. Robinson ; K. J. Hackett ; M. Purcell-Miramontes ; S. J. Brown ; J. D. Evans ; M. R. Goldsmith ; D. Lawson ; J. Okamuro ; H. M. Robertson ; D. J. Schneider
American Association for the Advancement of Science (AAAS)
Published 2011Staff ViewPublication Date: 2011-03-19Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Arthropods/genetics ; Genome ; *Genome, Insect ; Insects/*genetics ; *Sequence Analysis, DNAPublished by: -
7Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2011-05-27Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Bees/*drug effects/genetics/*growth & development/physiology ; Body Size/drug effects ; Drosophila melanogaster/drug effects/enzymology/growth & development/physiology ; Fat Body/drug effects/metabolism ; Fatty Acids/chemistry/*pharmacology ; Female ; Fertility/drug effects ; Glycoproteins/isolation & purification/pharmacology ; Insect Proteins/isolation & purification/pharmacology ; Juvenile Hormones/metabolism ; Larva/drug effects/growth & development ; Longevity/drug effects ; Ovary/drug effects/growth & development ; Phenotype ; Protein Stability ; Receptor, Epidermal Growth Factor/metabolism ; Ribosomal Protein S6 Kinases, 70-kDa/metabolism ; Signal Transduction/drug effects ; *Social DominancePublished by: -
8Articles: DFG German National LicensesCampbell, S. J. ; Mackie, I. J. ; Robinson, G. E. ; Machin, S. J.
Oxford, UK : Blackwell Publishing Ltd
Published 1993Staff ViewISSN: 1471-0528Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Objective To study the fibrinolytic pathways and their relationship with the contact system in women using combined oral contraceptives (COCs).Design Serial plasma samples were collected from 18 women before treatment with COCs containing 30 μg oestrogen during treatment cycles 3 and 6, and 2 weeks after stopping treatment. Fibrinolysis was measured before and after dextran sulphate mediated contact activation using fibrin plates.Results Fibrinolysis increased significantly during cycles 3 and 6 (from 77% to 100% and 113%, respectively, P〈0.01) and showed a further increase after dextran sulphate activation (from 134% to 158% and 167%, respectively, P〈0.01). Tissue-plasminogen activator, urokinase-plasminogen activator and plasminogen activator inhibitor did not change significantly. There were significant elevations of Factor XII (from 0.92 μ/ml to 1.43 u/ml, P〈0.01) and prekallikrein (0.94 u/ml to 1.10 u/ml, P〈0.05) in cycle 3, which both remained high at cycle 6 (P〈0.01) and decreased after stopping the COC. Alpha-2-macroglobulin and C1-esterase inhibitor showed no significant change, but alpha-1-antitrypsin increased from 0.85 u/ml to 1.11 u/ml by cycle 3 (P〈0.01), and returned to near normal levels after stopping the COC.Conclusions The increase in fibrinolysis may be due to increased levels of Factor XII and prekallikrein without a corresponding increase in their natural inhibitors (C1-esterase inhibitor and alpha-2-macroglobulin). A parallel increase in the intrinsic pathway of coagulation may be limited by elevated alpha-1-antitrypsin at the level of activated Factor XI. The increase in fibrinolysis caused by oral contraceptives may balance any potential thrombotic risk due to increased fibrinogen or vitamin K dependent coagulation factors.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesBen-Shahar, Y. ; Thompson, C. K. ; Hartz, S. M. ; Smith, B. H. ; Robinson, G. E.
Springer
Published 2000Staff ViewISSN: 1435-9456Keywords: Key words Proboscis extension reflex ; Associative learning ; Social insectsSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract We studied the association between honey bee (Apis mellifera) division of labor and performance on an olfactory reversal-learning test. Manipulations of colony age structure and flight experience were used to test whether differences in performance are associated with age, current behavioral state, or flight experience. Nurse bees showed significantly faster rates of extinction to a learned odor than did foragers. This difference was associated primarily with differences in behavioral state, rather than age; it was seen when comparing nurses and foragers from typical colonies and normal-age nurses and precocious foragers from single-cohort colonies. Differences in extinction rate were not related to differences in flight experience; there was no difference between foragers and foraging-age bees denied flight experience. These results suggest that changes in learning and memory occur in association with division of labor. We speculate on the possible functional significance of the difference in extinction rate between nurses and foragers.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1420-9071Keywords: Social behavior ; honeybee ; division of labor ; behavior geneticsSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Summary Recent studies have demonstrated a genotypic component to the division of labor among worker honeybees. However, these studies used artificially-selected strains of bees or colonies derived from queens that were instrumentally inseminated with the semen from very few males. We present evidence for genotypic variability among groups of workers performing tasks in colonies with naturally-mated queens. These results demonstrate that genetic structure is a level of social organization in honeybees.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 1432-1351Keywords: Key wordsApis mellifera ; Division of labor ; Juvenile hormone ; Behavioral development ; Primer pheromoneSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Abstract Previous studies suggest that older honey bee workers possess an inhibitory signal that regulates behavioral development in younger bees. To study how this inhibitor is transmitted, bees were reared for 7 days in double-screen cages, single-screen cages, or unrestricted in a typical colony (control bees). Double-screen cages prevented physical contact with colony members while single-screen cages allowed only antennation and food exchange. Bees reared in double-screen cages showed accelerated endocrine and behavioral development; they had significantly higher rates of juvenile hormone biosynthesis and juvenile hormone titers than did control bees and also were more likely to become precocious foragers. Relative to the other two groups, bees reared in single-screen cages showed intermediate juvenile hormone biosynthesis rates and titers, and intermediate rates of behavioral development. These results indicate that physical contact is required for total inhibition. We also began to test the hypothesis that worker mandibular glands are the sources of an inhibitory signal. Old bees with mandibular glands removed were significantly less inhibitory towards young bees than were sham-operated and unoperated bees. These results suggest that an inhibitor is produced by the worker mandibular glands.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1432-1351Keywords: Key wordsApis mellifera ; Behavioral development ; Dopamine ; Octopamine ; SerotoninSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Abstract Brain levels of dopamine, serotonin, and octopamine were measured in relation to both age-related division of labor and inter-individual differences in task specialization independent of age in honey bee colonies. The only differences among similarly aged bees performing different tasks were significantly lower levels of dopamine in food storers than comb builders and significantly lower levels of octopamine in soldiers than foragers, but soldiers also were slightly younger than foragers. Differences associated with age-related division of labor were stronger. Older bees, notably foragers, had significantly higher levels of all three amines than did younger bees working in the hive. Using social manipulations to unlink chronological age and behavioral status, octopamine was found to exhibit the most robust association between behavior and amine level, independent of age. Octopamine levels were significantly lower in normal-age nurses versus precocious foragers and overage nurses versus normal-age foragers, but not different in reverted nurses versus reversion colony foragers. Dopamine levels were significantly lower in normal-age nurses versus precocious foragers, but higher in reverted nurses versus reversion colony foragers. Serotonin levels did not differ in any of these comparisons. These correlative results suggest that octopamine is involved in the regulation of age-related division of labor in honey bees.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1432-1351Keywords: Key wordsApis mellifera ; Behavioural development ; Division of labor ; Dopamine ; Serotonin ; OctopamineSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Abstract Levels of the biogenic amines dopamine, serotonin, and octopamine were measured in different brain regions of adult worker honey bees as a function of age-related division of labor, using social manipulations to unlink age and behavioral state. In the antennal lobes, foragers had higher levels of all three amines than nurses, regardless of age. Differences were larger for octopamine than serotonin or dopamine. In the mushroom bodies, older bees had higher levels of all three amines than younger bees, regardless of behavioral state. These correlative results suggest that increases in octopamine in the antennal lobes may be particularly important in the control of age-related division of labor in honey bees.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 1432-1351Keywords: Key words Dominance ; Reproduction ; Biogenic amines ; Bumble bees ; Social insectsSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Abstract To begin to explore the role of biogenic amines in reproductive division of labor in social insects, brain levels of dopamine, serotonin, and octopamine were measured in bumble bee (Bombus terrestris) workers and queens that differ in behavioral and reproductive state. Levels of all three amines were similar for mated and virgin queens. Young workers that developed with or without a queen had similar amine levels, but in queenright colonies differences in biogenic amine levels were associated with differences in behavior and reproductive physiology. Dominant workers had significantly higher octopamine levels compared with workers of lower dominance status but of similar size, age, and ovary state. High dopamine levels were associated with the last stages of oocyte development irrespective of worker social status and behavior. These results suggest that biogenic amines are involved in behavioral and physiological aspects of regulation of reproduction in bumble bees.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 1420-9098Source: Springer Online Journal Archives 1860-2000Topics: BiologyDescription / Table of Contents: Zusammenfassung Dass Einsetzen fremder Bienenköniginnen (Apis mellifera) in Beobachtungskolonien mit individuell markierten Arbeiterinnen ergab drei voneinander verschiedene, gleichzeitig auftretende Wirkungen. 1) Vollkommene Passivität; 2) nicht aggressives; und 3) aggressives Knäueverhalten. Knäueln dauerte 9,2 Std. (N=12) und wurde von etwa 15–20% der Populationen in den Kolonien ausgeführt. Die Beteiligung am Knäueln war altersabhängig, 91,2% der Arbeiterinnen mit Knäuelverhalten waren 12 Tage alt oder älter. Lediglich ein kleiner Anteil (0,5–2%) der Arbeiterinnen in den Kolonien verhielten sich aggresiv, während die restlichen nicht-aggressives Knäuelverhalten zeigten. Aggressive Arbeiterinnen verbrachten signifikant mehr zeit beim Knäulen als nicht-aggressive Arbeiterinnen, jedoch war kein Unterschied im Alter der zwei Untergruppen sichtbar. Fremde Königinnen wurden nicht unmittelbar nach dem Einsetzen getötet und wurden während der Dauer des Knäuelverhaltens nicht fortwährend angegriffen. Knäuelnde Arbeiterrinen begannen sich allmählich an einige fremde Königinnen 3–5 Std. nach dem Einsetzen zu gewöhnen. Die Stärke der Arbeiter-Aggressivität sank ständig, während die Aktivität der Königen zunahm. Des Beobachtungen des Königinnenverhaltens während dem Knäulen stützen nicht die “Stress Pheromon Hypothese” (Yadava undSmith, 1971).Notes: Summary Introductions of foreign queen honey bees (Apis mellifera) to observation colonies containing individually marked workers resulted in three distinct, simultaneously occurring responses: 1) complete passivity; 2) nonaggressive balling behavior; and 3) aggressive balling behavior. Balling persisted for 9.2 h (N=12) and involved approximately 15–20% of the colonies' populations. Participation in a ball was age-dependent, with 91.2% of the balling workers 12 days old or older. Only a small fraction (0.5–2%) of the colonies' workers behaved aggressively, while the remainder displayed nonaggressive balling behavior. Aggressive workers spent significantly more time in a ball than did nonaggressive workers, but there was no difference in age between the two subgroups. Foreign queens were not killed immediately upon introduction and were not continuously attacked throughout the balling period. Balling workers gradually became conditioned to some foreign queens beginning 3–5 h after introduction; the incidence of worker aggression steaily decreased while queen activity increased. Observations of queen behavior during balling do not support the “stress pheromone hypothesis” (Yadava andSmith, 1971).Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1432-0762Keywords: Key words Apis mellifera ; Norm of reaction ; Genetic variability ; Social insectsSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract There is a genetic component to plasticity in age polyethism in honey bee colonies, such that workers of some genotypes become precocious foragers more readily than do workers of other genotypes, in colonies lacking older bees. Using colonies composed of workers from two identifiable genotype groups, we determined that intracolony differences in the likelihood of becoming a precocious forager are a consequence of differences in rates of behavioral development that are also evident under conditions leading to normal development. An alternative hypothesis, that differences in the likelihood of becoming a precocious forager are due to differences in general sensitivity to altered colony conditions, was not supported. In three out of three trials, workers from the genotype group that was more likely to exhibit precocious foraging in single cohort colonies also foraged at relatively younger ages in colonies in which workers exhibited normal behavioral development. In contrast, in three out of three trials, workers from the genotype group that was more likely to exhibit precocious foraging in single-cohort colonies did not show disproportionately more overaged nursing in colonies in which workers exhibited delayed development. These results indicate that genotypic differences in plasticity in age-related division of labor are based on genotypic differences in rates of behavioral development.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 1432-0762Keywords: Key words Age demography ; Behavioral development ; Behavioral plasticity ; Juvenile hormone ; Temporal polyethismSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract The age at which worker honey bees begin foraging varies under different colony conditions. Previous studies have shown that juvenile hormone (JH) mediates this behavioral plasticity, and that worker-worker interactions influence both JH titers and age at first foraging. These results also indicated that the age at first foraging is delayed in the presence of foragers, suggesting that colony age demography directly influences temporal division of labor. We tested this hypothesis by determining whether behavioral or physiological development can be accelerated, delayed, or reversed by altering colony age structure. In three out of three trials, earlier onset of foraging was induced in colonies depleted of foragers compared to colonies depleted of an equal number of bees across all age classes. In two out of three trials, delayed onset of foraging was induced in colonies in which foragers were confined compared to colonies with free-flying foragers. Finally, in three out of three trials, both endocrine and exocrine changes associated with reversion from foraging to brood care were induced in colonies composed of all old bees and devoid of brood; JH titers decreased and hypopharyngeal glands regenerated. These results demonstrate that plasticity in age-related division of labor in honey bee colonies is at least partially controlled by social factors. The implications of these results are discussed for the recently developed ‘‘activator-inhibitor” model for honey bee behavioral development.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesStaff View
ISSN: 1432-0762Keywords: Key words Bumblebees ; Bombus terrestris ; Caste determination ; Queen-worker conflict ; Juvenile hormoneSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Endocrine analyses were used to investigate the well-known association between queen production and the onset of worker reproduction (termed the competition phase, CPh) in Bombus terrestris. Larvae that reached the age of 5 days before the CPh had a worker-like profile: low juvenile hormone (JH) biosynthesis rates and low JH hemolymph titers. In contrast, larvae that reached the age of 5 days during the CPh had a queen-like profile: high JH biosynthesis rates and high hemolymph JH levels. Larval fate could be manipulated by transplanting egg cells into host colonies with different social structures. There was a steep rise in JH production in larvae transplanted into colonies near or during the CPh. This indicates that during colony development, larvae switch from the ”worker developmental pathway” to the ”queen developmental pathway,” and that the switch is socially regulated. In small rearing groups, larvae reared with queens before the CPh developed into workers, whereas those reared with queens after the CPh developed into queens. Variation in worker type (naive or experienced) did not affect caste determination. Therefore, we hypothesize that queens produce a pheromone that directly inhibits queen differentiation by larvae. We also present two alternative scenarios that explain the timing of gyne production in B. terrestris, one based on ecological constraints and the other based on queen-worker competition.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 1432-136XKeywords: Corpora allata ; Seasonal variation ; Juvenile hormone ; Social insects ; Honey bee, Apis melliferaSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Abstract Honey bee colonies can respond to changing environmental conditions by showing plasticity in age related division of labor, and these responses are associated with changes in juvenile hormone. The shift from nest taks to foraging has been especially well characterized; foraging is associated with high juvenile hormone titers and high rates of juvenile hormone biosynthesis, and can be induced prematurely in young bees by juvenile hormone treatment or by a shortage of foragers. However, very few studies have been conducted that study plasticity in division of labor under naturally occurring changes in the environment. To gain further insight into how the environment and juvenile hormone influence foraging behavior, we measured juvenile hormone titers and rates of biosynthesis in workers during times of the year when colony activity in temperate climates is reduced: late fall, winter, and early spring. Juvenile hormone titers and rates of biosynthesis decreased in foragers in the fall as foraging diminished and bees became less active. This demonstration of a natural drop in juvenile hormone confirms and extends previous findings when bees were experimentally induced to revert from foraging to within-hive tasks. In addition, endocrine changes in foragers in the fall are part of a larger seasonally related phenomenon in which juvenile hormone levels in younger, pre-foraging bees also decline in the fall and then increase the following spring as colony activity increases. The seasonal decline in juvenile hormone in foragers was mimicked in summer by placing a honey bee colony in a cold room for 8 days. This suggests that seasonal changes in juvenile hormone are not related to photoperiod changes, but rather to changes in temperature and/or colony social structure that in turn influence endocrine and behavioral development. We also found that active foragers in the late winter and early spring had lower juvenile hormone levels than active foragers in late spring. In light of recent findings of a possible link between juvenile hormone and neuroanatomical plasticity in the bee brain, these results suggest that bees can forage with low juvenile hormone, after previous exposure to some threshold level of juvenile hormone leads to changes in brain structure.Type of Medium: Electronic ResourceURL: