863 results found
    1. Neuroscience

    Fatigue induces long-lasting detrimental changes in motor-skill learning

    Meret Branscheidt et al.
    A series of experiments shows how muscle fatigue impairs motor-skill learning on subsequent practice days beyond its effects on task execution.
    1. Neuroscience

    Accelerated redevelopment of vocal skills is preceded by lasting reorganization of the song motor circuitry

    Michiel Vellema et al.
    The ability to quickly re-acquire a previously lost motor skill is associated with lasting synaptic changes in the brain circuit that controls that motor skill.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Altered bone growth dynamics prefigure craniosynostosis in a zebrafish model of Saethre-Chotzen syndrome

    Camilla S Teng et al.
    Sequential live imaging of abnormal skull bone fusion in zebrafish reveals a deeply conserved role of two transcription factors, Twist1 and Tcf12, in regulating stem cell activity during growth of the skull.
    1. Evolutionary Biology

    Preliminary paleohistological observations of the StW 573 (‘Little Foot’) skull

    Amélie Beaudet et al.
    Virtual investigation of the 3.67-million-year-old skull of 'Little Foot' using synchrotron radiation reveals histological details of Australopithecus dental and bone tissues.
    1. Developmental Biology
    2. Evolutionary Biology

    Resolving homology in the face of shifting germ layer origins: Lessons from a major skull vault boundary

    Camilla S Teng et al.
    Homology of vertebrate skull structures should be based on evolutionary continuity and an appreciation of germ layer origins and inductive signaling in the embryonic head.
    1. Neuroscience

    Corticostriatal dynamics encode the refinement of specific behavioral variability during skill learning

    Fernando J Santos et al.
    Recordings from the mouse brain as animals learn a lever pressing task reveal how the motor system optimizes skill learning by reducing variability in those aspects of task performance that are essential for achieving a goal.
    1. Neuroscience

    A neural circuit mechanism for regulating vocal variability during song learning in zebra finches

    Jonathan Garst-Orozco et al.
    By demonstrating song learning-related synaptic strengthening and pruning in the vocal control circuits of songbirds, and showing how such changes can reduce the sensitivity of the circuit to ‘noisy’ inputs, a simple neural circuit mechanism for regulating motor variability during motor skill learning is identified.
    1. Neuroscience

    Skill learning strengthens cortical representations of motor sequences

    Tobias Wiestler, Jörn Diedrichsen
    Detailed analysis of fMRI data shows that sequences of movements are associated with individual patterns of neural activity that become more distinct with training.
    1. Evolutionary Biology

    Neurocranial anatomy of an enigmatic Early Devonian fish sheds light on early osteichthyan evolution

    Alice M Clement et al.
    Stunning new scan data of an enigmatic fish from the Early Devonian of Australia, Ligulalepis, is identified as a stem osteichthyan, specifically, as the sister taxon to the 'psarolepids' plus crown osteichthyans.
    1. Neuroscience

    Distinct recruitment of dorsomedial and dorsolateral striatum erodes with extended training

    Youna Vandaele et al.
    Dorsomedial and dorsolateral striatal neural activity differ during early learning of action sequences but do not change with performance improvement across sessions, and become similar after extended training.

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