Superior temporal sulcus

Superior temporal sulcus The superior temporal sulcus is a prominent groove within the temporal lobe that separates the superior temporal gyrus from the middle temporal gyrus. It has been studied in anatomical surveys by Paul Broca, Carl Wernicke, Korbinian Brodmann, and mapped in neuroimaging studies at institutions such as Harvard Medical School, Massachusetts Institute of Technology, University College London, and the Max Planck Society. Research frameworks from laboratories led by Michael Gazzaniga, Oliver Sacks, Vilayanur S. Ramachandran, and Nancy Kanwisher have shaped modern understanding of its role in social perception, language, and auditory processing.

Anatomy

The sulcus lies on the lateral surface of the temporal lobe between the superior temporal gyrus and the middle temporal gyrus, coursing posteriorly toward the region classically associated with Wernicke's area and anteriorly approaching the vicinity of the insula and the Sylvian fissure. Comparative neuroanatomy reports from the Smithsonian Institution, the Natural History Museum, London, and the American Museum of Natural History document homologous sulcal patterns in primates studied by teams including Jane Goodall, Frans de Waal, and Dario Maestripieri. Cytoarchitectonic subdivisions align with maps by Brodmann and modern atlases from the Allen Institute for Brain Science, while MRI parcellations reference work at the Human Connectome Project and the National Institutes of Health.

Development and Morphology

Prenatal folding of the sulcus is described in fetal atlases assembled by researchers at King's College London, University of Oxford, Stanford University, and the Karolinska Institute, with developmental timelines compared across cohorts from the World Health Organization studies and datasets from the European Union consortium projects. Morphological variability has been reported in population surveys by teams affiliated with Columbia University, Yale University, Johns Hopkins University, and University of California, Los Angeles, and linked to genetic loci identified in cohorts collaborating with the Wellcome Trust and the National Human Genome Research Institute. Evolutionary morphology discussions reference fossil analyses curated at the Natural History Museum, London and theoretical perspectives from Charles Darwin and Stephen Jay Gould.

Functional Roles

Functional neuroimaging and lesion studies implicate the sulcus region in processing complex auditory patterns, speech perception, biological motion, and theory of mind; major contributors include labs at Massachusetts General Hospital, UCSF, McGill University, and Rutgers University. Work by investigators such as Alison Gopnik, Simon Baron-Cohen, Tania Singer, and Uta Frith ties sulcal responses to social cognition, while researchers including Stanislas Dehaene, Noam Chomsky, Steven Pinker, and Elizabeth Bates connect it to language comprehension and semantic integration. Studies published in journals like Nature Neuroscience, Science, The Lancet, and Neuron report task-evoked activation in paradigms developed at the Salk Institute, Broad Institute, and European Molecular Biology Laboratory.

Clinical Significance

Lesions, ischemia, and developmental anomalies near the sulcus are implicated in aphasia, autism spectrum conditions, schizophrenia, and prosopagnosia; clinical case series are reported from Mayo Clinic, Cleveland Clinic, Guy's and St Thomas' NHS Foundation Trust, and the Beth Israel Deaconess Medical Center. Therapeutic and diagnostic work involving neurosurgical approaches by teams at Johns Hopkins Hospital, Mount Sinai Hospital (New York), Charité – Universitätsmedizin Berlin, and Karolinska University Hospital informs outcome data used by regulatory bodies such as the Food and Drug Administration and the European Medicines Agency. Neurodevelopmental risk studies reference cohorts curated by UNICEF and clinical trials registered with the National Institutes of Health.

Connectivity and Networks

Anatomical tractography and tracer studies map connections between the sulcal cortex and regions including the auditory cortex, inferior frontal gyrus, posterior parietal cortex, and the amygdala, with connectivity matrices developed by the Human Connectome Project, Blue Brain Project, and groups at Princeton University and ETH Zurich. Functional network analyses situate the sulcus within the default mode network, the dorsal attention network, and social brain networks characterized by consortia such as the Allen Institute for Brain Science and the Consortium for Neuropsychiatric Phenomics. Cross-disciplinary collaborations involving the European Research Council, National Science Foundation, and the Gates Foundation support multimodal mapping efforts integrating diffusion MRI, electrocorticography, and single-unit recordings obtained in studies by Kamil Ugurbil, David Van Essen, Eve Marder, and Nicholas Spitzer.

Category:Neuroanatomy