Unconstrained Problems | List of Frontiers open access articles

Original Research

Published on 05 Mar 2026

The relationship between teacher identity and learning engagement in sports training students: the mediating role of learning motivation

in Educational Psychology

Hanzhen Ou
Ke Yang

Frontiers in Psychology

doi 10.3389/fpsyg.2026.1677374

Opinion

Published on 05 Mar 2026

Governing access to medicines in Central America: community pharmacy, patient safety, and lessons from Spain

in Person-Centered Health and Care Systems

Esteban Zavaleta-Monestel
Luis Carlos Monge-Bogantes
Jeaustin Mora-Jiménez
Sebastián Arguedas-Chacón

Frontiers in Health Services

doi 10.3389/frhs.2026.1781501

Opinion

Published on 05 Mar 2026

Homage to James Feeney, a pioneer of biological NMR – Part I

in Structural Biology

Andrew Lane

Frontiers in Molecular Biosciences

doi 10.3389/fmolb.2026.1758506

160 views

Original Research

Published on 05 Mar 2026

Mid to late Holocene storminess and fire history on the Baltic coast of Latvia

in Population, Community, and Ecosystem Dynamics

Normunds Stivrins
Aija Cerina
Mara Kitenberga
Edyta Kalińska
Alekss Maksims
Angelica Feurdean
Siim Veski

Frontiers in Ecology and Evolution

doi 10.3389/fevo.2026.1727897

100 views

Original Research

Published on 05 Mar 2026

Crop rotation-driven changes in secondary metabolites of potato rhizosphere soil exert stronger regulation on soil microbial community

in Terrestrial Microbiology

Jinjin Li
Qingcheng Li
Mantang Wang
Shuqing Xu
Danju Zhang

Frontiers in Microbiology

doi 10.3389/fmicb.2026.1768797

109 views

Original Research

Published on 05 Mar 2026

Crosstalk of cancer stemness-neutrophils in outcome of intracranial germ cell tumors

in Cancer Immunity and Immunotherapy

Botao Zhang
Qiang Ji
Yi Lin
Wenbin Li

Frontiers in Immunology

doi 10.3389/fimmu.2026.1571513

Brief Research Report

Published on 05 Mar 2026

Changes in lower-limb neuromuscular performance from pre-season to the end of the early competitive period in elite male professional soccer players

in Elite Sports and Performance Enhancement

Rodrigo Ferrari
William Borges da Silva
Leandro de Oliveira Carpes
Cíntia Lazzari
Anderson Donelli Silveira

Frontiers in Sports and Active Living

doi 10.3389/fspor.2026.1722539

Original Research

Published on 05 Mar 2026

A cross-sectional analysis of AI readiness and attitudes among nurses in resource-limited Chinese county hospitals

in Human Factors and Digital Health

Ming Yu
Rong Yu
Mengjia Zhou
Xiaoli Fan
Ronghui Geng
Jing Ji
Suping Cai
Lili JIang
Lingling Jiang

Frontiers in Digital Health

doi 10.3389/fdgth.2026.1778627

Original Research

Published on 05 Mar 2026

EEG response and productivity outcome under changing indoor environment

in Health Economics

Shuyao Zhang
Tianyi Ma
Sophia Zuoqiu

Frontiers in Public Health

doi 10.3389/fpubh.2026.1767357

142 views

Original Research

Published on 05 Mar 2026

Expression of immune-related genes and possible regulatory mechanisms in ulcerative colitis

in Molecular Diagnostics and Therapeutics

Fanfan Qu
Baoqing Xu
Yi Zhou
Yang He
Yanda Wang
Jiaxin Li
Jiayin Li
Aihua Shen

Frontiers in Molecular Biosciences

doi 10.3389/fmolb.2026.1621643

898 views

Original Research

Published on 05 Mar 2026

Medial to lateral diagonal injury of the elbow without elbow dislocation in children

in Pediatric Orthopedics

Limin Hou
Jie Li
Wei Zhang
He Hu
Peng Yue
Peng Wang
Fei Jiang

Frontiers in Pediatrics

doi 10.3389/fped.2026.1762246

Review

Published on 05 Mar 2026

Non-medical use of exogenous testosterone and anabolic–androgenic substances in young men: health, psychological, and fertility consequences

in Developmental Endocrinology

Krzysztof Kowalik
Patryk Harasny
Laura Kaliczyńska
Konrad Reweda-Kwiatkowski
Dariusz Starzyński
Michał Pawlak
Arkadiusz Waloryszak
Magdalena Ptak
Andrzej Modrzejewski
Dagmara Lisman

Frontiers in Endocrinology

doi 10.3389/fendo.2026.1781416

107 views

Original Research

Published on 05 Mar 2026

Presbyvestibulopathy: an uncommon cause of dizziness in the elderly

in Neuro-Otology

Tzu-Pu Chang
Yu-Hung Kuo
Anand K. Bery

Frontiers in Neurology

doi 10.3389/fneur.2026.1744462

Original Research

Published on 05 Mar 2026

Association between fundus tessellated density and subfoveal choroidal thickness in children with different refractive statuses

in Ophthalmology

Cong Zhang
Yue Yan
Lingli Zhang
Jie Wang
Xingye Wang
Xiyuan Zhou

Frontiers in Medicine

doi 10.3389/fmed.2026.1713592

Case Report

Published on 05 Mar 2026

Gabapentin may promote language development in a pediatric patient with autism spectrum disorder: a case report

in Autism and Other Neurodevelopmental Disorders

Tobias Kremsmayer
Robert Blakey
Hugo Hidrogo
Nikolas Mata-Machado

Frontiers in Child and Adolescent Psychiatry

doi 10.3389/frcha.2026.1685978

Original Research

Published on 05 Mar 2026

Spatial transcriptomic profiling identifies lacrimal-gland-epithelial cell-driven mechanisms underlying autoimmunity in Sjögren’s disease

in Antigen Presenting Cell Biology

Shivali Gupta
Athanasios Ploumakis
Nikolaos Kalavros
Sharmila Masli

Frontiers in Immunology

doi 10.3389/fimmu.2026.1759347

144 views

Articles

The relationship between teacher identity and learning engagement in sports training students: the mediating role of learning motivation

Governing access to medicines in Central America: community pharmacy, patient safety, and lessons from Spain

Homage to James Feeney, a pioneer of biological NMR – Part I

Mid to late Holocene storminess and fire history on the Baltic coast of Latvia

Crop rotation-driven changes in secondary metabolites of potato rhizosphere soil exert stronger regulation on soil microbial community

Crosstalk of cancer stemness-neutrophils in outcome of intracranial germ cell tumors

Changes in lower-limb neuromuscular performance from pre-season to the end of the early competitive period in elite male professional soccer players

A cross-sectional analysis of AI readiness and attitudes among nurses in resource-limited Chinese county hospitals

EEG response and productivity outcome under changing indoor environment

Expression of immune-related genes and possible regulatory mechanisms in ulcerative colitis

Medial to lateral diagonal injury of the elbow without elbow dislocation in children

Non-medical use of exogenous testosterone and anabolic–androgenic substances in young men: health, psychological, and fertility consequences

Presbyvestibulopathy: an uncommon cause of dizziness in the elderly

Association between fundus tessellated density and subfoveal choroidal thickness in children with different refractive statuses

Gabapentin may promote language development in a pediatric patient with autism spectrum disorder: a case report

Spatial transcriptomic profiling identifies lacrimal-gland-epithelial cell-driven mechanisms underlying autoimmunity in Sjögren’s disease