Dinosaur palaeoneurology: an evolving science DOI Creative Commons
Amy M. Balanoff

Biology Letters, Год журнала: 2024, Номер 20(12)

Опубликована: Дек. 1, 2024

Our fascination with dinosaur brains and their capabilities essentially began the first discovery. The history of this study is a useful reflection palaeoneurology as whole its relationship to more inclusive evolutionary neuroscience. I argue that imbued high heuristic potential, but one whose realization requires overcoming certain constraints. These constraints include need for stable phylogenetic framework, methods efficient precise endocast construction, fossil researchers who are steeped in neuroscience perspective. progress has already been made these areas sets stage mature palaeoneurology—not only capable being informed by discoveries drives such discoveries. draw from work on size, shape, behavioural correlates developmental role brain outline current advances palaeoneurology. My examples largely taken theropods centre questions related origin birds unique locomotory capabilities. hope, however, exemplify potential other groups, utilizing dinosaur–bird lineage parallel model par mammals studying encephalization.

Язык: Английский

Dynamic evolutionary interplay between ontogenetic skull patterning and whole-head integration DOI
Joni Ollonen, Eraqi R. Khannoon, Simone Macrì

и другие.

Nature Ecology & Evolution, Год журнала: 2024, Номер 8(3), С. 536 - 551

Опубликована: Янв. 10, 2024

Язык: Английский

Процитировано

10

Echolocation and dietary adaptations mediate brain-endocast covariation in bats DOI Creative Commons
Camilo López‐Aguirre,

Banaz Alam,

M. A. Rouf Mian

и другие.

iScience, Год журнала: 2025, Номер 28(4), С. 112159 - 112159

Опубликована: Март 5, 2025

Bats exhibit remarkable ecological diversity, reflected in different species' sensory, cognitive and behavioral ecology. Bat brain volume has been linked to powered flight, laryngeal echolocation, dietary transitions. Given the developmental trajectories functional demands skull share, bat skull-brain complex represents a unique means better understand evolutionary processes trade-offs. We assessed brain-endocast correspondence across bats, considering whether changes reflect adaptations. demonstrate that estimates of from both methods showed similar allometric trajectories, apart those for cerebral cortex. Our results reveal significant effect diet echolocation on cortex olfactory bulbs, respectively. suggest shifts bulbs indicate an trade-off between olfaction echolocation. study offers perspective future comparative neuroanatomical studies involving extinct living species museum collections.

Язык: Английский

Процитировано

0

A brain-wide analysis maps structural evolution to distinct anatomical module DOI Creative Commons
Robert A. Kozol, Andrew J. Conith,

Anders Yuiska

и другие.

eLife, Год журнала: 2023, Номер 12

Опубликована: Июль 27, 2023

The vertebrate brain is highly conserved topologically, but less known about neuroanatomical variation between individual regions. Neuroanatomical at the regional level hypothesized to provide functional expansion, building upon ancestral anatomy needed for basic functions. Classically, animal models used study evolution have lacked tools detailed anatomical analysis that are widely in zebrafish and mice, presenting a barrier studying fine scales. In this study, we sought investigate of using single species fish consisting divergent surface cave morphs, permits genetic testing volume shape across entire brain. We generated high-resolution atlas blind Mexican cavefish Astyanax mexicanus coupled with automated computational directly assess variability region all populations. measured every grossly defined assessed correlations regions fish, cavefish, × F 2 hybrids, whose phenotypes span range cave. find dorsal contracted, while ventral expanded, hybrid data providing support developmental constraint along dorsal-ventral axis. Furthermore, these relationships show similar patterns both shape, suggesting captured by two parameters could be driven mechanisms. Together, demonstrate A. powerful system functionally determining principles will permit how genes influence early patterning events drive brain-wide evolution.

Язык: Английский

Процитировано

9

Evolution of the essential gene MN1 during the macroevolutionary transition toward patterning the vertebrate hindbrain DOI Creative Commons
Elio Escamilla-Vega,

Louk W. G. Seton,

Stella Kyomen

и другие.

Proceedings of the National Academy of Sciences, Год журнала: 2025, Номер 122(22)

Опубликована: Май 27, 2025

The tight link between brain and skull formation is a fundamental aspect of vertebrate evolution embryogenesis. Their developmental synchronization essential for structural functional integration. shape coevolution evident along the phylogeny; however, genetic basis underlying their close evolutionary relationship remains little explored. Here, we reveal function MN1 gene that was previously found to be associated with significant variation in mouse cranial bones. We show evolved from an ancestral deuterostome sequence. In vertebrates, structure, synteny, spatiotemporal expression pattern are remarkably conserved, indicating carries out core function. Using newly generated knock-out model, demonstrate vivo Mn1 integrated into ancient molecular machinery controls Cyp26 genes developing hindbrain, thereby tuning retinoic acid levels patterning central nervous system. This study thus showcases emergence novel sequence its role generating macroevolutionary innovation. data expand our knowledge codevelopment highlight this regulatory loop craniofacial human syndromes.

Язык: Английский

Процитировано

0

A proxy for brain‐to‐endocranial cavity index in non‐neornithean dinosaurs and other extinct archosaurs DOI
Fabien Knoll,

Asato Ishikawa,

Soichiro Kawabe

и другие.

The Journal of Comparative Neurology, Год журнала: 2024, Номер 532(3)

Опубликована: Март 1, 2024

Abstract Although the brain fills nearly entire cranial cavity in birds, it can occupy a small portion of crocodilians. The lack data regarding volumetric correspondence between and hampers thorough assessments degree encephalization non‐neornithean dinosaurs other extinct archosaurs and, consequently, informed inferences their cognitive capacities. Existing suggest that, across extant archosaurs, endocranial doming volume intracranial nonneural components are inversely related. We build upon this information to develop an equation relating these two anatomical features archosaurs. rely on measurements endocast brain‐to‐endocranial (BEC) index relatives dinosaurs, namely, crurotarsans Caiman crocodilus , Crocodylus niloticus porosus ; paleognaths Struthio camelus Apteryx mantelli fowl Macrocephalon maleo Gallus gallus Meleagris gallopavo Phasianus colchicus Anas platyrhynchos . Applying representative endocasts from major clades we found that BEC varies about 0.6 ceratopsians thyreophorans around 0.7 ornithopods, pachycephalosaurians, sauropods, theropods. We, therefore, warn against use catch‐all value, like 0.5, instead encourage refinement adoption

Язык: Английский

Процитировано

2

Covariation of brain and skull shapes as a model to understand the role of crosstalk in development and evolution DOI Creative Commons
Andrew J. Conith,

Sylvie A. Hope,

R. Craig Albertson

и другие.

Evolution & Development, Год журнала: 2022, Номер 25(1), С. 85 - 102

Опубликована: Ноя. 14, 2022

Abstract Covariation among discrete phenotypes can arise due to selection for shared functions, and/or genetic and developmental underpinnings. The consequences of such phenotypic integration are far‐reaching act either facilitate or limit morphological variation. vertebrate brain is known as an “organizer” craniofacial development, secreting morphogens that affect the shape growing neurocranium, consistent with roles pleiotropy in brain–neurocranium covariation. Here, we test this hypothesis cichlid fishes by first examining degree between neurocranium using three‐dimensional geometric morphometrics F 5 hybrid population, then genetically mapping trait covariation quantitative loci (QTL) analysis. We observe associations a pattern holds even when assess constituent parts neurocranium: rostrum braincase. also recover robust signals both hard‐ soft‐tissue traits identify genomic region where QTL braincase overlap, implicating role patterning Fine overlapping identifies candidate gene, notch1a , which be involved skeletal neural tissues during development. Taken together, these data offer covariation, well potential mechanism behavioral shifts may simultaneously drive rapid change neuroanatomy morphology.

Язык: Английский

Процитировано

9

The professional interactions between speech language therapist and dentist DOI Creative Commons

Martina Costanzo,

Francesco Puleio, Roberto Lo Giudice

и другие.

Exploration of Medicine, Год журнала: 2024, Номер unknown, С. 434 - 443

Опубликована: Июнь 25, 2024

Aim: This study investigates the collaborative efforts between speech language therapists and dentists to address challenges faced by patients with concurrent dental issues. It underscores importance of understanding complex interactions within craniofacial system its implications for both oral health communication abilities. Methods: A questionnaire-based research was conducted involving dentists, using Google Forms as medium data collection. disseminated through professional networks, where practitioners provided information on their demographics, practices collaboration, perceived advantages such interdisciplinary work. All ethical standards were adhered to, ensuring confidentiality informed consent participants. Results: The findings indicate that often see first patient visits beyond recommended ages primarily existing conditions, deviating from preventive norms. About half communicate monthly therapists, revealing gaps in early care collaboration. Speech focus disorders orofacial myofunctional (SMOF), 37% collaborating frequently dentists. interaction highlights potential enhanced outcomes cooperation. Despite these challenges, groups acknowledged benefits efforts. Conclusions: partnership represents a vital area healthcare, aimed at tackling issues multidisciplinary approach. Although obstacles collaboration identified, positive observed partnerships emphasize developing unified framework improve integrated healthcare delivery future.

Язык: Английский

Процитировано

1

Covariation of Skull and Brain Morphology in Domestic Dogs DOI
Sophie A. Barton, Marc Kent, Erin E. Hecht

и другие.

The Journal of Comparative Neurology, Год журнала: 2024, Номер 532(9)

Опубликована: Сен. 1, 2024

ABSTRACT Despite their distinct embryonic origins, the skull and brain are highly integrated. Understanding covariation between can shed light on anatomical, cognitive, behavioral traits in extant extinct species. Domestic dogs offer a unique opportunity to investigate skull–brain due diverse morphologies neural anatomy. To assess this question, we examined T 2‐weighted MRI studies of 62 from 33 breeds, plus an additional 17 mixed or unknown breeds. Scans were opportunistically collected veterinary teaching hospital that referred for neurological examination but did not have grossly observable structural abnormalities. As neurocrania become broader shorter, there is significant decrease gray matter volume right olfactory bulb, frontal cortex, marginal gyrus, cerebellum. On other hand, as narrower longer, temporal amygdala, hypothalamus, hippocampus, periaqueductal gray, cerebellum, brainstem. Selective breeding specific shapes may impact canine anatomy function.

Язык: Английский

Процитировано

1

The evolution and genetic basis of a functionally critical skull bone, the parasphenoid, among Lake Malawi cichlids DOI Creative Commons
Andrew J. Conith, Stefano Pascarella,

Sylvie A. Hope

и другие.

Evolutionary Journal of the Linnean Society, Год журнала: 2024, Номер 3(1)

Опубликована: Янв. 1, 2024

Abstract Adaptive radiation, whereby a clade pairs rapid speciation with phenotypic evolution, can result in an uneven distribution of biodiversity across the Metazoan tree. The cichlid fishes East Africa have undergone multiple adaptive radiations within major rift lakes. Cichlid are marked by divergence distinct habitat gradients producing many morphological and behavioural adaptations. Here, we characterize shape parasphenoid, bone neurocranium that dissipates forces generated during feeding. We examine Tropheops, group has transitioned between deep shallow habitats times, to habitat-specific differences parasphenoid shape. find depth length Tropheops residing each habitat, variation may impact ability cranium resist force. next use hybrid cross two species differ shape, Labeotropheus genetic basis these differences. perform mapping identify genomic regions responsible for These implicated other functional traits including oral jaws neurocranium, indicating landscape evolution be limited few loci broad effects. Repurposing same gene(s) via regulatory sufficient selection drive transitions important incipient stages radiations.

Язык: Английский

Процитировано

0

Dinosaur palaeoneurology: an evolving science DOI Creative Commons
Amy M. Balanoff

Biology Letters, Год журнала: 2024, Номер 20(12)

Опубликована: Дек. 1, 2024

Our fascination with dinosaur brains and their capabilities essentially began the first discovery. The history of this study is a useful reflection palaeoneurology as whole its relationship to more inclusive evolutionary neuroscience. I argue that imbued high heuristic potential, but one whose realization requires overcoming certain constraints. These constraints include need for stable phylogenetic framework, methods efficient precise endocast construction, fossil researchers who are steeped in neuroscience perspective. progress has already been made these areas sets stage mature palaeoneurology—not only capable being informed by discoveries drives such discoveries. draw from work on size, shape, behavioural correlates developmental role brain outline current advances palaeoneurology. My examples largely taken theropods centre questions related origin birds unique locomotory capabilities. hope, however, exemplify potential other groups, utilizing dinosaur–bird lineage parallel model par mammals studying encephalization.

Язык: Английский

Процитировано

0